// Type definitions for webpack 4.41
// Project: https://github.com/webpack/webpack
// Definitions by: Qubo <https://github.com/tkqubo>
//                 Benjamin Lim <https://github.com/bumbleblym>
//                 Boris Cherny <https://github.com/bcherny>
//                 Tommy Troy Lin <https://github.com/tommytroylin>
//                 Mohsen Azimi <https://github.com/mohsen1>
//                 Jonathan Creamer <https://github.com/jcreamer898>
//                 Alan Agius <https://github.com/alan-agius4>
//                 Dennis George <https://github.com/dennispg>
//                 Christophe Hurpeau <https://github.com/christophehurpeau>
//                 ZSkycat <https://github.com/ZSkycat>
//                 John Reilly <https://github.com/johnnyreilly>
//                 Ryan Waskiewicz <https://github.com/rwaskiewicz>
//                 Kyle Uehlein <https://github.com/kuehlein>
//                 Grgur Grisogono <https://github.com/grgur>
//                 Rubens Pinheiro Gonçalves Cavalcante <https://github.com/rubenspgcavalcante>
//                 Anders Kaseorg <https://github.com/andersk>
//                 Felix Haus <https://github.com/ofhouse>
//                 Daniel Chin <https://github.com/danielthank>
//                 Daiki Ihara <https://github.com/sasurau4>
//                 Dion Shi <https://github.com/dionshihk>
//                 Piotr Błażejewicz <https://github.com/peterblazejewicz>
//                 Michał Grzegorzewski <https://github.com/spamshaker>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.3

/// <reference types="node" />

import { Hash as CryptoHash } from 'crypto';
import {
  Tapable,
  HookMap,
  SyncBailHook,
  SyncHook,
  SyncLoopHook,
  SyncWaterfallHook,
  AsyncParallelBailHook,
  AsyncParallelHook,
  AsyncSeriesBailHook,
  AsyncSeriesHook,
  AsyncSeriesWaterfallHook,
} from 'tapable';
import * as UglifyJS from 'uglify-js';
import * as anymatch from 'anymatch';
import { RawSourceMap } from 'source-map';
import { Source, ConcatSource } from 'webpack-sources';

export = webpack;

declare function webpack(
    options:
        | webpack.Configuration
        | webpack.ConfigurationFactory,
    handler: webpack.Compiler.Handler,
): webpack.Compiler.Watching | webpack.Compiler;
declare function webpack(options?: webpack.Configuration): webpack.Compiler;

declare function webpack(
    options:
        | webpack.Configuration[]
        | webpack.MultiConfigurationFactory,
    handler: webpack.MultiCompiler.Handler
): webpack.MultiWatching | webpack.MultiCompiler;
declare function webpack(options: webpack.Configuration[]): webpack.MultiCompiler;

declare namespace webpack {
    /** Webpack package version. */
    const version: string | undefined;

    interface Configuration {
        /** Enable production optimizations or development hints. */
        mode?: "development" | "production" | "none";
        /** Name of the configuration. Used when loading multiple configurations. */
        name?: string;
        /**
         * The base directory (absolute path!) for resolving the `entry` option.
         * If `output.pathinfo` is set, the included pathinfo is shortened to this directory.
         */
        context?: string;
        entry?: string | string[] | Entry | EntryFunc;
        /** Choose a style of source mapping to enhance the debugging process. These values can affect build and rebuild speed dramatically. */
        devtool?: Options.Devtool;
        /** Options affecting the output. */
        output?: Output;
        /** Options affecting the normal modules (NormalModuleFactory) */
        module?: Module;
        /** Options affecting the resolving of modules. */
        resolve?: Resolve;
        /** Like resolve but for loaders. */
        resolveLoader?: ResolveLoader;
        /**
         * Specify dependencies that shouldn’t be resolved by webpack, but should become dependencies of the resulting bundle.
         * The kind of the dependency depends on output.libraryTarget.
         */
        externals?: ExternalsElement | ExternalsElement[];
        /**
         * - "web" Compile for usage in a browser-like environment (default).
         * - "webworker" Compile as WebWorker.
         * - "node" Compile for usage in a node.js-like environment (use require to load chunks).
         * - "async-node" Compile for usage in a node.js-like environment (use fs and vm to load chunks async).
         * - "node-webkit" Compile for usage in webkit, uses jsonp chunk loading but also supports builtin node.js modules plus require(“nw.gui”) (experimental)
         * - "atom" Compile for usage in electron (formerly known as atom-shell), supports require for modules necessary to run Electron.
         * - "electron-renderer" Compile for Electron for renderer process, providing a target using JsonpTemplatePlugin, FunctionModulePlugin for browser
         *   environments and NodeTargetPlugin and ExternalsPlugin for CommonJS and Electron built-in modules.
         * - "electron-preload" Compile for Electron for renderer process, providing a target using NodeTemplatePlugin with asyncChunkLoading set to true,
         *   FunctionModulePlugin for browser environments and NodeTargetPlugin and ExternalsPlugin for CommonJS and Electron built-in modules.
         * - "electron-main" Compile for Electron for main process.
         * - "atom" Alias for electron-main.
         * - "electron" Alias for electron-main.
         */
        target?: 'web' | 'webworker' | 'node' | 'async-node' | 'node-webkit' | 'atom' | 'electron' | 'electron-renderer' | 'electron-preload' | 'electron-main' | ((compiler?: any) => void);
        /** Report the first error as a hard error instead of tolerating it. */
        bail?: boolean;
        /** Capture timing information for each module. */
        profile?: boolean;
        /** Cache generated modules and chunks to improve performance for multiple incremental builds. */
        cache?: boolean | object;
        /** Enter watch mode, which rebuilds on file change. */
        watch?: boolean;
        watchOptions?: Options.WatchOptions;
        /** Include polyfills or mocks for various node stuff */
        node?: Node | false;
        /** Set the value of require.amd and define.amd. */
        amd?: { [moduleName: string]: boolean };
        /** Used for recordsInputPath and recordsOutputPath */
        recordsPath?: string;
        /** Load compiler state from a json file. */
        recordsInputPath?: string;
        /** Store compiler state to a json file. */
        recordsOutputPath?: string;
        /** Add additional plugins to the compiler. */
        plugins?: Plugin[];
        /** Stats options for logging  */
        stats?: Options.Stats;
        /** Performance options */
        performance?: Options.Performance | false;
        /** Limit the number of parallel processed modules. Can be used to fine tune performance or to get more reliable profiling results */
        parallelism?: number;
        /** Optimization options */
        optimization?: Options.Optimization;
    }

    interface CliConfigOptions {
        config?: string;
        mode?: Configuration["mode"];
        env?: string;
        'config-register'?: string;
        configRegister?: string;
        'config-name'?: string;
        configName?: string;
    }

    type ConfigurationFactory = ((
        env: string | Record<string, boolean | number | string> | undefined,
        args: CliConfigOptions,
    ) => Configuration | Promise<Configuration>);

    type MultiConfigurationFactory = ((
        env: string | Record<string, boolean | number | string> | undefined,
        args: CliConfigOptions,
    ) => Configuration[] | Promise<Configuration[]>);

    interface Entry {
        [name: string]: string | string[];
    }

    type EntryFunc = () => (string | string[] | Entry | Promise<string | string[] | Entry>);

    interface DevtoolModuleFilenameTemplateInfo {
        identifier: string;
        shortIdentifier: string;
        resource: any;
        resourcePath: string;
        absoluteResourcePath: string;
        allLoaders: any[];
        query: string;
        moduleId: string;
        hash: string;
    }

    interface Output {
        /** When used in tandem with output.library and output.libraryTarget, this option allows users to insert comments within the export wrapper. */
        auxiliaryComment?: string | AuxiliaryCommentObject;
        /** The filename of the entry chunk as relative path inside the output.path directory. */
        filename?: string | ((chunkData: ChunkData) => string);
        /** The filename of non-entry chunks as relative path inside the output.path directory. */
        chunkFilename?: string;
        /** Number of milliseconds before chunk request expires, defaults to 120,000. */
        chunkLoadTimeout?: number;
        /** This option enables cross-origin loading of chunks. */
        crossOriginLoading?: string | boolean;
        /** The JSONP function used by webpack for asnyc loading of chunks. */
        jsonpFunction?: string;
        /** Allows customization of the script type webpack injects script tags into the DOM to download async chunks. */
        jsonpScriptType?: 'text/javascript' | 'module';
        /** Filename template string of function for the sources array in a generated SourceMap. */
        devtoolModuleFilenameTemplate?: string | ((info: DevtoolModuleFilenameTemplateInfo) => string);
        /** Similar to output.devtoolModuleFilenameTemplate, but used in the case of duplicate module identifiers. */
        devtoolFallbackModuleFilenameTemplate?: string | ((info: DevtoolModuleFilenameTemplateInfo) => string);
        /**
         * Enable line to line mapped mode for all/specified modules.
         * Line to line mapped mode uses a simple SourceMap where each line of the generated source is mapped to the same line of the original source.
         * It’s a performance optimization. Only use it if your performance need to be better and you are sure that input lines match which generated lines.
         * true enables it for all modules (not recommended)
         */
        devtoolLineToLine?: boolean;
        /** This option determines the modules namespace used with the output.devtoolModuleFilenameTemplate. */
        devtoolNamespace?: string;
        /** The filename of the Hot Update Chunks. They are inside the output.path directory. */
        hotUpdateChunkFilename?: string;
        /** The JSONP function used by webpack for async loading of hot update chunks. */
        hotUpdateFunction?: string;
        /** The filename of the Hot Update Main File. It is inside the output.path directory. */
        hotUpdateMainFilename?: string;
        /** If set, export the bundle as library. output.library is the name. */
        library?: string | string[] | {[key: string]: string};
        /**
         * Which format to export the library:
         * - "var" - Export by setting a variable: var Library = xxx (default)
         * - "this" - Export by setting a property of this: this["Library"] = xxx
         * - "commonjs" - Export by setting a property of exports: exports["Library"] = xxx
         * - "commonjs2" - Export by setting module.exports: module.exports = xxx
         * - "amd" - Export to AMD (optionally named)
         * - "umd" - Export to AMD, CommonJS2 or as property in root
         * - "window" - Assign to window
         * - "assign" - Assign to a global variable
         * - "jsonp" - Generate Webpack JSONP module
         * - "system" - Generate a SystemJS module
         */
        libraryTarget?: LibraryTarget;
        /** Configure which module or modules will be exposed via the `libraryTarget` */
        libraryExport?: string | string[];
        /** If output.libraryTarget is set to umd and output.library is set, setting this to true will name the AMD module. */
        umdNamedDefine?: boolean;
        /** The output directory as absolute path. */
        path?: string;
        /** Include comments with information about the modules. */
        pathinfo?: boolean;
        /** The output.path from the view of the Javascript / HTML page. */
        publicPath?: string;
        /** The filename of the SourceMaps for the JavaScript files. They are inside the output.path directory. */
        sourceMapFilename?: string;
        /** Prefixes every line of the source in the bundle with this string. */
        sourcePrefix?: string;
        /** The encoding to use when generating the hash, defaults to 'hex' */
        hashDigest?: 'hex' | 'latin1' | 'base64';
        /** The prefix length of the hash digest to use, defaults to 20. */
        hashDigestLength?: number;
        /** Algorithm used for generation the hash (see node.js crypto package) */
        hashFunction?: string | ((algorithm: string, options?: any) => any);
        /** An optional salt to update the hash via Node.JS' hash.update. */
        hashSalt?: string;
        /** An expression which is used to address the global object/scope in runtime code. */
        globalObject?: string;
        /**
         * Use the future version of asset emitting logic, which allows freeing memory of assets after emitting.
         * It could break plugins which assume that assets are still readable after they were emitted.
         * @deprecated - will be removed in webpack v5.0.0 and this behaviour will become the new default.
         */
        futureEmitAssets?: boolean;
    }

    type LibraryTarget = 'var' | 'assign' | 'this' | 'window' | 'global' | 'commonjs' | 'commonjs2' | 'amd' | 'umd' | 'jsonp' | 'system';

    type AuxiliaryCommentObject = { [P in LibraryTarget]: string };

    interface ChunkData {
        chunk: compilation.Chunk;
    }

    interface Module {
        /** A RegExp or an array of RegExps. Don’t parse files matching. */
        noParse?: RegExp | RegExp[] | ((content: string) => boolean);
        unknownContextRequest?: string;
        unknownContextRecursive?: boolean;
        unknownContextRegExp?: RegExp;
        unknownContextCritical?: boolean;
        exprContextRequest?: string;
        exprContextRegExp?: RegExp;
        exprContextRecursive?: boolean;
        exprContextCritical?: boolean;
        wrappedContextRegExp?: RegExp;
        wrappedContextRecursive?: boolean;
        wrappedContextCritical?: boolean;
        strictExportPresence?: boolean;
        /** An array of rules applied for modules. */
        rules: RuleSetRule[];
    }

    interface Resolve {
        /**
         * A list of directories to resolve modules from.
         *
         * Absolute paths will be searched once.
         *
         * If an entry is relative, will be resolved using node's resolution algorithm
         * relative to the requested file.
         *
         * Defaults to `["node_modules"]`
         */
        modules?: string[];

        /**
         * A list of package description files to search for.
         *
         * Defaults to `["package.json"]`
         */
        descriptionFiles?: string[];

        /**
         * A list of fields in a package description object to use for finding
         * the entry point.
         *
         * Defaults to `["browser", "module", "main"]` or `["module", "main"]`,
         * depending on the value of the `target` `Configuration` value.
         */
        mainFields?: string[] | string[][];

        /**
         * A list of fields in a package description object to try to parse
         * in the same format as the `alias` resolve option.
         *
         * Defaults to `["browser"]` or `[]`, depending on the value of the
         * `target` `Configuration` value.
         *
         * @see alias
         */
        aliasFields?: string[] | string[][];

        /**
         * A list of file names to search for when requiring directories that
         * don't contain a package description file.
         *
         * Defaults to `["index"]`.
         */
        mainFiles?: string[];

        /**
         * A list of file extensions to try when requesting files.
         *
         * An empty string is considered invalid.
         */
        extensions?: string[];

        /**
         * If true, requires that all requested paths must use an extension
         * from `extensions`.
         */
        enforceExtension?: boolean;

        /**
         * Replace the given module requests with other modules or paths.
         *
         * @see aliasFields
         */
        alias?: { [key: string]: string; };

        /**
         * Whether to use a cache for resolving, or the specific object
         * to use for caching. Sharing objects may be useful when running
         * multiple webpack compilers.
         *
         * Defaults to `true`.
         */
        unsafeCache?: {} | boolean;

        /**
         * A function used to decide whether to cache the given resolve request.
         *
         * Defaults to `() => true`.
         */
        cachePredicate?(data: { path: string, request: string }): boolean;

        /**
         * A list of additional resolve plugins which should be applied.
         */
        plugins?: ResolvePlugin[];

        /**
         * Whether to resolve symlinks to their symlinked location.
         *
         * Defaults to `true`
         */
        symlinks?: boolean;

        /**
         * If unsafe cache is enabled, includes request.context in the cache key.
         * This option is taken into account by the enhanced-resolve module.
         * Since webpack 3.1.0 context in resolve caching is ignored when resolve or resolveLoader plugins are provided.
         * This addresses a performance regression.
         */
        cacheWithContext?: boolean;

        /**
         * A list of directories where requests of server-relative URLs
         * (starting with '/') are resolved, defaults to context configuration option.
         * On non-Windows systems these requests are resolved as an absolute path first.
         */
        roots?: string[];
    }

    interface ResolveLoader extends Resolve {
        /**
         * List of strings to append to a loader's name when trying to resolve it.
         */
        moduleExtensions?: string[];

        enforceModuleExtension?: boolean;
    }

    type ExternalsElement = string | RegExp | ExternalsObjectElement | ExternalsFunctionElement;

    interface ExternalsObjectElement {
        [key: string]: boolean | string | string[] | Record<string, string | string[]>;
    }

    interface ExternalsFunctionCallback {
        /**
         * Invoke with no arguments to not externalize
         */
        (): void;
        /**
         * Callback with an Error
         */
        (error: {}): void; /* tslint:disable-line:unified-signatures */
        /**
         * Externalize the dependency
         */
        (error: null, result: string | string[] | ExternalsObjectElement, type?: string): void;
    }
    type ExternalsFunctionElement = (context: any, request: any, callback: ExternalsFunctionCallback) => any;

    interface Node {
        console?: boolean | 'mock';
        process?: boolean | 'mock';
        global?: boolean;
        __filename?: boolean | 'mock';
        __dirname?: boolean | 'mock';
        Buffer?: boolean | 'mock';
        setImmediate?: boolean | 'mock' | 'empty';
        [nodeBuiltin: string]: boolean | 'mock' | 'empty' | undefined;
    }

    interface NewLoader {
        loader: string;
        options?: { [name: string]: any };
    }
    type Loader = string | NewLoader;

    interface ParserOptions {
        [optName: string]: any;
        system?: boolean;
    }

    type RuleSetCondition =
        | RegExp
        | string
        | ((path: string) => boolean)
        | RuleSetConditions
        | {
            /**
             * Logical AND
             */
            and?: RuleSetCondition[];
            /**
             * Exclude all modules matching any of these conditions
             */
            exclude?: RuleSetCondition;
            /**
             * Exclude all modules matching not any of these conditions
             */
            include?: RuleSetCondition;
            /**
             * Logical NOT
             */
            not?: RuleSetCondition[];
            /**
             * Logical OR
             */
            or?: RuleSetCondition[];
            /**
             * Exclude all modules matching any of these conditions
             */
            test?: RuleSetCondition;
        };

    // A hack around circular type referencing
    interface RuleSetConditions extends Array<RuleSetCondition> {}

    interface RuleSetRule {
        /**
         * Enforce this rule as pre or post step
         */
        enforce?: "pre" | "post";
        /**
         * Shortcut for resource.exclude
         */
        exclude?: RuleSetCondition;
        /**
         * Shortcut for resource.include
         */
        include?: RuleSetCondition;
        /**
         * Match the issuer of the module (The module pointing to this module)
         */
        issuer?: RuleSetCondition;
        /**
         * Shortcut for use.loader
         */
        loader?: RuleSetUse;
        /**
         * Shortcut for use.loader
         */
        loaders?: RuleSetUse;
        /**
         * Only execute the first matching rule in this array
         */
        oneOf?: RuleSetRule[];
        /**
         * Shortcut for use.options
         */
        options?: RuleSetQuery;
        /**
         * Options for parsing
         */
        parser?: { [k: string]: any };
        /**
         * Options for the resolver
         */
        resolve?: Resolve;
        /**
         * Flags a module as with or without side effects
         */
        sideEffects?: boolean;
        /**
         * Shortcut for use.query
         */
        query?: RuleSetQuery;
        /**
         * Module type to use for the module
         */
        type?: "javascript/auto" | "javascript/dynamic" | "javascript/esm" | "json" | "webassembly/experimental";
        /**
         * Match the resource path of the module
         */
        resource?: RuleSetCondition;
        /**
         * Match the resource query of the module
         */
        resourceQuery?: RuleSetCondition;
        /**
         * Match the child compiler name
         */
        compiler?: RuleSetCondition;
        /**
         * Match and execute these rules when this rule is matched
         */
        rules?: RuleSetRule[];
        /**
         * Shortcut for resource.test
         */
        test?: RuleSetCondition;
        /**
         * Modifiers applied to the module when rule is matched
         */
        use?: RuleSetUse;
    }

    type RuleSetUse =
        | RuleSetUseItem
        | RuleSetUseItem[]
        | ((data: any) => RuleSetUseItem | RuleSetUseItem[]);

    interface RuleSetLoader {
        /**
         * Loader name
         */
        loader?: string;
        /**
         * Loader options
         */
        options?: RuleSetQuery;
        /**
         * Unique loader identifier
         */
        ident?: string;
        /**
         * Loader query
         */
        query?: RuleSetQuery;
    }

    type RuleSetUseItem =
        | string
        | RuleSetLoader
        | ((data: any) => string | RuleSetLoader);

    type RuleSetQuery =
        | string
        | { [k: string]: any };

    /**
     * @deprecated Use RuleSetCondition instead
     */
    type Condition = RuleSetCondition;

    /**
     * @deprecated Use RuleSetRule instead
     */
    type Rule = RuleSetRule;

    namespace Options {
        type Devtool = 'eval' | 'inline-source-map' | 'cheap-eval-source-map' | 'cheap-source-map' | 'cheap-module-eval-source-map' | 'cheap-module-source-map' | 'eval-source-map'
            | 'source-map' | 'nosources-source-map' | 'hidden-source-map' | 'nosources-source-map' | 'inline-cheap-source-map' | 'inline-cheap-module-source-map' | '@eval'
            | '@inline-source-map' | '@cheap-eval-source-map' | '@cheap-source-map' | '@cheap-module-eval-source-map' | '@cheap-module-source-map' | '@eval-source-map'
            | '@source-map' | '@nosources-source-map' | '@hidden-source-map' | '@nosources-source-map' | '#eval' | '#inline-source-map' | '#cheap-eval-source-map'
            | '#cheap-source-map' | '#cheap-module-eval-source-map' | '#cheap-module-source-map' | '#eval-source-map' | '#source-map' | '#nosources-source-map'
            | '#hidden-source-map' | '#nosources-source-map' | '#@eval' | '#@inline-source-map' | '#@cheap-eval-source-map' | '#@cheap-source-map' | '#@cheap-module-eval-source-map'
            | '#@cheap-module-source-map' | '#@eval-source-map' | '#@source-map' | '#@nosources-source-map' | '#@hidden-source-map' | '#@nosources-source-map' | boolean;

        interface Performance {
            /** This property allows webpack to control what files are used to calculate performance hints. */
            assetFilter?(assetFilename: string): boolean;
            /**
             * Turns hints on/off. In addition, tells webpack to throw either an error or a warning when hints are
             * found. This property is set to "warning" by default.
             */
            hints?: 'warning' | 'error' | false;
            /**
             * An asset is any emitted file from webpack. This option controls when webpack emits a performance hint
             * based on individual asset size. The default value is 250000 (bytes).
             */
            maxAssetSize?: number;
            /**
             * An entrypoint represents all assets that would be utilized during initial load time for a specific entry.
             * This option controls when webpack should emit performance hints based on the maximum entrypoint size.
             * The default value is 250000 (bytes).
             */
            maxEntrypointSize?: number;
        }
        type Stats = Stats.ToStringOptions;
        type WatchOptions = ICompiler.WatchOptions;
        interface CacheGroupsOptions {
            /** Assign modules to a cache group */
            test?: ((...args: any[]) => boolean) | string | RegExp;
            /** Select chunks for determining cache group content (defaults to \"initial\", \"initial\" and \"all\" requires adding these chunks to the HTML) */
            chunks?: "initial" | "async" | "all" | ((chunk: compilation.Chunk) => boolean);
            /** Ignore minimum size, minimum chunks and maximum requests and always create chunks for this cache group */
            enforce?: boolean;
            /** Priority of this cache group */
            priority?: number;
            /** Minimal size for the created chunk */
            minSize?: number;
            /** Maximum size for the created chunk */
            maxSize?: number;
            /** Minimum number of times a module has to be duplicated until it's considered for splitting */
            minChunks?: number;
            /** Maximum number of requests which are accepted for on-demand loading */
            maxAsyncRequests?: number;
            /** Maximum number of initial chunks which are accepted for an entry point */
            maxInitialRequests?: number;
            /** Try to reuse existing chunk (with name) when it has matching modules */
            reuseExistingChunk?: boolean;
            /** Give chunks created a name (chunks with equal name are merged) */
            name?: boolean | string | ((...args: any[]) => any);
        }
        interface SplitChunksOptions {
            /** Select chunks for determining shared modules (defaults to \"async\", \"initial\" and \"all\" requires adding these chunks to the HTML) */
            chunks?: "initial" | "async" | "all" | ((chunk: compilation.Chunk) => boolean);
            /** Minimal size for the created chunk */
            minSize?: number;
            /** Maximum size for the created chunk */
            maxSize?: number;
            /** Minimum number of times a module has to be duplicated until it's considered for splitting */
            minChunks?: number;
            /** Maximum number of requests which are accepted for on-demand loading */
            maxAsyncRequests?: number;
            /** Maximum number of initial chunks which are accepted for an entry point */
            maxInitialRequests?: number;
            /** Give chunks created a name (chunks with equal name are merged) */
            name?: boolean | string | ((...args: any[]) => any);
            /** Assign modules to a cache group (modules from different cache groups are tried to keep in separate chunks) */
            cacheGroups?: false | string | ((...args: any[]) => any) | RegExp | { [key: string]: CacheGroupsOptions | false };
            /** Override the default name separator (~) when generating names automatically (name: true)  */
            automaticNameDelimiter?: string;
        }
        interface RuntimeChunkOptions {
            /** The name or name factory for the runtime chunks. */
            name?: string | ((...args: any[]) => any);
        }
        interface Optimization {
            /**
             *  Modules are removed from chunks when they are already available in all parent chunk groups.
             *  This reduces asset size. Smaller assets also result in faster builds since less code generation has to be performed.
             */
            removeAvailableModules?: boolean;
            /** Empty chunks are removed. This reduces load in filesystem and results in faster builds. */
            removeEmptyChunks?: boolean;
            /** Equal chunks are merged. This results in less code generation and faster builds. */
            mergeDuplicateChunks?: boolean;
            /** Chunks which are subsets of other chunks are determined and flagged in a way that subsets don’t have to be loaded when the bigger chunk has been loaded. */
            flagIncludedChunks?: boolean;
            /** Give more often used ids smaller (shorter) values. */
            occurrenceOrder?: boolean;
            /** Determine exports for each module when possible. This information is used by other optimizations or code generation. I. e. to generate more efficient code for export * from. */
            providedExports?: boolean;
            /**
             *  Determine used exports for each module. This depends on optimization.providedExports. This information is used by other optimizations or code generation.
             *  I. e. exports are not generated for unused exports, export names are mangled to single char identifiers when all usages are compatible.
             *  DCE in minimizers will benefit from this and can remove unused exports.
             */
            usedExports?: boolean;
            /**
             *  Recognise the sideEffects flag in package.json or rules to eliminate modules. This depends on optimization.providedExports and optimization.usedExports.
             *  These dependencies have a cost, but eliminating modules has positive impact on performance because of less code generation. It depends on your codebase.
             *  Try it for possible performance wins.
             */
            sideEffects?: boolean;
            /** Tries to find segments of the module graph which can be safely concatenated into a single module. Depends on optimization.providedExports and optimization.usedExports. */
            concatenateModules?: boolean;
            /** Finds modules which are shared between chunk and splits them into separate chunks to reduce duplication or separate vendor modules from application modules. */
            splitChunks?: SplitChunksOptions | false;
            /** Create a separate chunk for the webpack runtime code and chunk hash maps. This chunk should be inlined into the HTML */
            runtimeChunk?: boolean | "single" | "multiple" | RuntimeChunkOptions;
            /** Avoid emitting assets when errors occur. */
            noEmitOnErrors?: boolean;
            /** Instead of numeric ids, give modules readable names for better debugging. */
            namedModules?: boolean;
            /** Instead of numeric ids, give chunks readable names for better debugging. */
            namedChunks?: boolean;
            /** Tells webpack which algorithm to use when choosing module ids. Default false. */
            moduleIds?: boolean | "natural" | "named" | "hashed" | "size" | "total-size";
            /** Tells webpack which algorithm to use when choosing chunk ids. Default false. */
            chunkIds?: boolean | "natural" | "named" | "size" | "total-size";
            /** Defines the process.env.NODE_ENV constant to a compile-time-constant value. This allows to remove development only code from code. */
            nodeEnv?: string | false;
            /** Use the minimizer (optimization.minimizer, by default uglify-js) to minimize output assets. */
            minimize?: boolean;
            /** Minimizer(s) to use for minimizing the output */
            minimizer?: Array<Plugin | Tapable.Plugin>;
            /** Generate records with relative paths to be able to move the context folder". */
            portableRecords?: boolean;
        }
    }

    /**
     * @see https://webpack.js.org/api/logging/
     * @since 4.39.0
     */
    interface Logger {
        error(message?: any, ...optionalParams: any[]): void;
        warn(message?: any, ...optionalParams: any[]): void;
        info(message?: any, ...optionalParams: any[]): void;
        log(message?: any, ...optionalParams: any[]): void;
        debug(message?: any, ...optionalParams: any[]): void;
        trace(message?: any, ...optionalParams: any[]): void;
        group(...label: any[]): void;
        groupEnd(): void;
        groupCollapsed(...label: any[]): void;
        status(message?: any, ...optionalParams: any[]): void;
        clear(): void;
        profile(label?: string): void;
        profileEnd(label?: string): void;
    }

    namespace debug {
        interface ProfilingPluginOptions {
            /** A relative path to a custom output file (json) */
            outputPath?: string;
        }
        /**
         * Generate Chrome profile file which includes timings of plugins execution. Outputs `events.json` file by
         * default. It is possible to provide custom file path using `outputPath` option.
         *
         * In order to view the profile file:
         * * Run webpack with ProfilingPlugin.
         * * Go to Chrome, open the Profile Tab.
         * * Drag and drop generated file (events.json by default) into the profiler.
         *
         * It will then display timeline stats and calls per plugin!
         */
        class ProfilingPlugin extends Plugin {
            constructor(options?: ProfilingPluginOptions);
        }
    }

    type LibraryExport = string | string[];

    interface AssetInfo {
        /**
         * true, if the asset can be long term cached forever (contains a hash)
         */
        immutable?: boolean;

        /**
         * the value(s) of the full hash used for this asset
         */
        fullhash?: LibraryExport;

        /**
         * the value(s) of the chunk hash used for this asset
         */
        chunkhash?: LibraryExport;

        /**
         * the value(s) of the module hash used for this asset
         */
        modulehash?: LibraryExport;

        /**
         * the value(s) of the content hash used for this asset
         */
        contenthash?: LibraryExport;

        /**
         * size in bytes, only set after asset has been emitted
         */
        size?: number;

        /**
         * true, when asset is only used for development and doesn't count towards user-facing assets
         */
        development?: boolean;

        /**
         * true, when asset ships data for updating an existing application (HMR)
         */
        hotModuleReplacement?: boolean;

        /**
         * object of pointers to other assets, keyed by type of relation (only points from parent to child)
         */
        related?: Record<string, LibraryExport>;
    }

    namespace compilation {
        class Asset {
            /**
             * the filename of the asset
             */
            name: string;

            /**
             * source of the asset
             */
            source: Source;

            /**
             * info about the asset
             */
            info: AssetInfo;
        }

        class DependenciesBlock {
        }

        class Module extends DependenciesBlock {
            constructor(type: string, context?: string);
            type: string;
            context: string | null;
            debugId: number;
            hash: string | undefined;
            renderedHash: string | undefined;
            resolveOptions: any;
            factoryMeta: any;
            warnings: any[];
            errors: any[];
            buildMeta: any;
            buildInfo: any;
            reasons: any[];
            _chunks: SortableSet<Chunk>;
            id: number | string | null;
            index: number | null;
            index2: number | null;
            depth: number | null;
            issuer: Module | null;
            profile: any;
            prefetched: boolean;
            built: boolean;

            used: null | boolean;
            usedExports: false | true | string[] | null;
            optimizationBailout: string | any[];
            _rewriteChunkInReasons: {
                oldChunk: Chunk, newChunks: Chunk[]
            } | undefined;
            useSourceMap: boolean;
            _source: any;

            exportsArgument: string | 'exports';
            moduleArgument: string | 'module';

            disconnect(): void;
            unseal(): void;
            setChunks(chunks: Chunk[]): void;
            addChunk(chunk: Chunk): boolean;
            removeChunk(chunk: Chunk): boolean;
            isInChunk(chunk: Chunk): boolean;
            isEntryModule(): boolean;
            optional: boolean;
            getChunks(): Chunk[];
            getNumberOfChunks: number;
            chunksIterable: SortableSet<Chunk>;
            hasEqualsChunks(module: Module): boolean;
            addReason(module: Module, dependency: any, explanation: any): void;
            removeReason(module: Module, dependency: any): boolean;
            hasReasonForChunk(chunk: Chunk): boolean;
            hasReasons(): boolean;
            rewriteChunkInReasons(oldChunk: Chunk, newChunks: Chunk[]): void;
            _doRewriteChunkInReasons(oldChunk: Chunk, newChunks: Chunk[]): void;
            isUsed(exportName?: string): boolean | string;
            isProvided(exportName: string): boolean | null;
            toString(): string;
            needRebuild(fileTimestamps: any, contextTimestamps: any): boolean;
            updateHash(hash: any): void;
            sortItems(sortChunks?: boolean): void;
            unbuild(): void;
        }

        class Record {
        }

        class Chunk {
            constructor(name?: string);
            id: number | null;
            ids: number[] | null;
            debugId: number;
            name: string;
            preventIntegration: boolean;
            entryModule: Module | undefined;
            _modules: SortableSet<Module>;
            filenameTemplate: string | undefined;
            _groups: SortableSet<ChunkGroup>;
            files: string[];
            rendered: boolean;
            hash: string | undefined;
            contentHash: object;
            renderedHash: string | undefined;
            chunkReason: string | undefined;
            extraAsync: boolean;
            removedModules: any;

            hasRuntime(): boolean;
            canBeInitial(): boolean;
            isOnlyInitial(): boolean;
            hasEntryModule(): boolean;

            addModule(module: Module): boolean;
            removeModule(module: Module): boolean;
            setModules(modules: Module[]): void;
            getNumberOfModules(): number;
            // Internally returns this._modules
            // So it should have the same type as this._modules
            modulesIterable: SortableSet<Module>;

            addGroup(chunkGroup: ChunkGroup): boolean;
            removeGroup(chunkGroup: ChunkGroup): boolean;
            isInGroup(chunkGroup: ChunkGroup): boolean;
            getNumberOfGroups(): number;
            // Internally returns this._groups
            // So it should have the same type as this._groups
            groupsIterable: SortableSet<ChunkGroup>;

            compareTo(otherChunk: Chunk): -1 | 0 | 1;
            containsModule(module: Module): boolean;
            getModules(): Module[];
            getModulesIdent(): any[];
            remove(reason?: string): void;
            moveModule(module: Module, otherChunk: Chunk): void;
            integrate(otherChunk: Chunk, reason: string): boolean;
            split(newChunk: Chunk): void;
            isEmpty(): boolean;
            updateHash(hash: any): void;
            canBeIntegrated(otherChunk: Chunk): boolean;
            addMultiplierAndOverhead(
                size: number,
                options: {
                    chunkOverhead?: number;
                    entryChunkMultiplicator?: number
                },
            ): number;
            modulesSize(): number;
            size(options?: {
                chunkOverhead?: number;
                entryChunkMultiplicator?: number
            }): number;
            integratedSize(otherChunk: Chunk, options: any): number | false;
            sortModules(
                sortByFn: (module1: Module, module2: Module) => -1 | 0 | 1
            ): void;
            sortItems(): void;
            getAllAsyncChunks(): Set<Chunk>;
            getChunkMaps(realHash: boolean): {
                hash: any;
                contentHash: any;
                name: any;
            };
            getChildIdsByOrders(): any;
            getChildIdsByOrdersMap(includeDirectChildren?: boolean): any;
            // tslint:disable-next-line:ban-types
            getChunkModuleMaps(filterFn: Function): { id: any; hash: any };
            hasModuleInGraph(
                filterFn: (module: Module) => boolean,
                filterChunkFn: (chunk: Chunk) => boolean
            ): boolean;
            toString(): string;
        }

        type GroupOptions = string | { name?: string; };

        class ChunkGroup {
            chunks: Chunk[];
            childrenIterable: SortableSet<ChunkGroup>;
            parentsIterable: SortableSet<ChunkGroup>;
            insertChunk(chunk: Chunk, before: Chunk): boolean;
            getNumberOfChildren(): number;
            setModuleIndex(module: Module, index: number): void;
            getModuleIndex(module: Module): number | undefined;
            setModuleIndex2(module: Module, index: number): void;
            getModuleIndex2(module: Module): number | undefined;
            addChild(chunk: ChunkGroup): boolean;
            removeChild(chunk: ChunkGroup): boolean;
            setParents(newParents: Iterable<ChunkGroup>): void;
        }

        class ChunkHash {
            update(data: string | Buffer, inputEncoding?: string): ChunkHash;
        }

        interface SourcePosition {
            line: number;
            column?: number;
        }

        interface RealDependencyLocation {
            start: SourcePosition;
            end?: SourcePosition;
            index?: number;
        }

        interface SynteticDependencyLocation {
            name: string;
            index?: number;
        }

        type DependencyLocation = SynteticDependencyLocation | RealDependencyLocation;

        class Dependency {
            constructor();
            getResourceIdentifier(): any;
            getReference(): any;
            getExports(): any;
            getWarnings(): any;
            getErrors(): any;
            updateHash(hash: any): void;
            disconnect(): void;
            static compare(a: any, b: any): any;
        }

        interface NormalModuleFactoryHooks {
            resolver: SyncWaterfallHook;
            factory: SyncWaterfallHook;
            beforeResolve: AsyncSeriesWaterfallHook;
            afterResolve: AsyncSeriesWaterfallHook;
            createModule: SyncBailHook;
            module: SyncWaterfallHook;
            createParser: HookMap;
            parser: HookMap<normalModuleFactory.Parser>;
            createGenerator: HookMap;
            generator: HookMap;
        }

        class NormalModuleFactory extends Tapable {
            hooks: NormalModuleFactoryHooks;
        }

        namespace normalModuleFactory {
            interface ParserHooks {
                evaluateTypeof: HookMap;
                evaluate: HookMap;
                evaluateIdentifier: HookMap;
                evaluateDefinedIdentifier: HookMap;
                evaluateCallExpressionMember: HookMap;
                statement: SyncBailHook;
                statementIf: SyncBailHook;
                label: HookMap;
                import: SyncBailHook;
                importSpecifier: SyncBailHook;
                export: SyncBailHook;
                exportImport: SyncBailHook;
                exportDeclaration: SyncBailHook;
                exportExpression: SyncBailHook;
                exportSpecifier: SyncBailHook;
                exportImportSpecifier: SyncBailHook;
                varDeclaration: SyncBailHook;
                varDeclarationLet: HookMap;
                varDeclarationConst: HookMap;
                varDeclarationVar: HookMap;
                canRename: HookMap;
                rename: HookMap;
                assigned: HookMap;
                typeof: HookMap;
                importCall: SyncBailHook;
                call: HookMap;
                callAnyMember: HookMap;
                new: HookMap;
                expression: HookMap;
                expressionAnyMember: HookMap;
                expressionConditionalOperator: SyncBailHook;
                expressionLogicalOperator: SyncBailHook;
                program: SyncBailHook;
            }

            class Parser extends Tapable {
                hooks: ParserHooks;
            }
        }

        interface ContextModuleFactoryHooks {
            beforeResolve: AsyncSeriesWaterfallHook;
            afterResolve: AsyncSeriesWaterfallHook;
            contextModuleFiles: SyncWaterfallHook;
            alternatives: AsyncSeriesWaterfallHook;
        }

        class ContextModuleFactory extends Tapable {
            hooks: ContextModuleFactoryHooks;
        }

        class DllModuleFactory extends Tapable {
            hooks: {};
        }

        interface CompilationHooks {
            buildModule: SyncHook<Module>;
            rebuildModule: SyncHook<Module>;
            failedModule: SyncHook<Module, Error>;
            succeedModule: SyncHook<Module>;

            finishModules: SyncHook<Module[]>;
            finishRebuildingModule: SyncHook<Module>;

            unseal: SyncHook;
            seal: SyncHook;

            optimizeDependenciesBasic: SyncBailHook<Module[]>;
            optimizeDependencies: SyncBailHook<Module[]>;
            optimizeDependenciesAdvanced: SyncBailHook<Module[]>;
            afterOptimizeDependencies: SyncHook<Module[]>;

            optimize: SyncHook;

            optimizeModulesBasic: SyncBailHook<Module[]>;
            optimizeModules: SyncBailHook<Module[]>;
            optimizeModulesAdvanced: SyncBailHook<Module[]>;
            afterOptimizeModules: SyncHook<Module[]>;

            optimizeChunksBasic: SyncBailHook<Chunk[], ChunkGroup[]>;
            optimizeChunks: SyncBailHook<Chunk[], ChunkGroup[]>;
            optimizeChunksAdvanced: SyncBailHook<Chunk[], ChunkGroup[]>;
            afterOptimizeChunks: SyncHook<Chunk[], ChunkGroup[]>;

            optimizeTree: AsyncSeriesHook<Chunk[], Module[]>;
            afterOptimizeTree: SyncHook<Chunk[], Module[]>;

            optimizeChunkModulesBasic: SyncBailHook<Chunk[], Module[]>;
            optimizeChunkModules: SyncBailHook<Chunk[], Module[]>;
            optimizeChunkModulesAdvanced: SyncBailHook<Chunk[], Module[]>;
            afterOptimizeChunkModules: SyncHook<Chunk[], Module[]>;
            shouldRecord: SyncBailHook;

            reviveModules: SyncHook<Module[], Record[]>;
            optimizeModuleOrder: SyncHook<Module[]>;
            advancedOptimizeModuleOrder: SyncHook<Module[]>;
            beforeModuleIds: SyncHook<Module[]>;
            moduleIds: SyncHook<Module[]>;
            optimizeModuleIds: SyncHook<Module[]>;
            afterOptimizeModuleIds: SyncHook<Module[]>;

            reviveChunks: SyncHook<Chunk[], Record[]>;
            optimizeChunkOrder: SyncHook<Chunk[]>;
            beforeChunkIds: SyncHook<Chunk[]>;
            optimizeChunkIds: SyncHook<Chunk[]>;
            afterOptimizeChunkIds: SyncHook<Chunk[]>;

            recordModules: SyncHook<Module[], Record[]>;
            recordChunks: SyncHook<Chunk[], Record[]>;

            beforeHash: SyncHook;
            afterHash: SyncHook;

            recordHash: SyncHook<Record[]>;

            record: SyncHook<Compilation, Record[]>;

            beforeModuleAssets: SyncHook;
            shouldGenerateChunkAssets: SyncBailHook;
            beforeChunkAssets: SyncHook;
            additionalChunkAssets: SyncHook<Chunk[]>;

            records: SyncHook<Compilation, Record[]>;

            additionalAssets: AsyncSeriesHook;
            optimizeChunkAssets: AsyncSeriesHook<Chunk[]>;
            afterOptimizeChunkAssets: SyncHook<Chunk[]>;
            optimizeAssets: AsyncSeriesHook<Asset[]>;
            afterOptimizeAssets: SyncHook<Asset[]>;

            needAdditionalSeal: SyncBailHook;
            afterSeal: AsyncSeriesHook;

            chunkHash: SyncHook<Chunk, ChunkHash>;
            moduleAsset: SyncHook<Module, string>;
            chunkAsset: SyncHook<Chunk, string>;

            assetPath: SyncWaterfallHook<string>;

            needAdditionalPass: SyncBailHook;
            childCompiler: SyncHook;

            normalModuleLoader: SyncHook<any, Module>;

            optimizeExtractedChunksBasic: SyncBailHook<Chunk[]>;
            optimizeExtractedChunks: SyncBailHook<Chunk[]>;
            optimizeExtractedChunksAdvanced: SyncBailHook<Chunk[]>;
            afterOptimizeExtractedChunks: SyncHook<Chunk[]>;
        }

        interface CompilationModule {
            module: any;
            issuer: boolean;
            build: boolean;
            dependencies: boolean;
        }

        class MainTemplate extends Tapable {
          hooks: {
            jsonpScript?: SyncWaterfallHook<string, Chunk, string>;
            require: SyncWaterfallHook<string, Chunk, string>;
            requireExtensions: SyncWaterfallHook<string, Chunk, string>;
            requireEnsure: SyncWaterfallHook<string, Chunk, string>;
            localVars: SyncWaterfallHook<string, Chunk, string>;
            afterStartup: SyncWaterfallHook<string, Chunk, string>;
            hash: SyncHook<CryptoHash>;
            hashForChunk: SyncHook<CryptoHash, Chunk>;
          };
          outputOptions: Output;
          requireFn: string;
          renderRequireFunctionForModule(hash: string, chunk: Chunk, varModuleId?: number | string): string;
          renderAddModule(hash: string, chunk: Chunk, varModuleId: number | string | undefined, varModule: string): string;
        }
        class ChunkTemplate extends Tapable {}
        class HotUpdateChunkTemplate extends Tapable {}
        class RuntimeTemplate {}

        interface ModuleTemplateHooks {
            content: SyncWaterfallHook;
            module: SyncWaterfallHook;
            render: SyncWaterfallHook;
            package: SyncWaterfallHook;
            hash: SyncHook;
        }

        class ModuleTemplate extends Tapable {
            hooks: ModuleTemplateHooks;
        }

        class Compilation extends Tapable {
            hooks: CompilationHooks;
            compiler: Compiler;

            resolverFactory: any;
            inputFileSystem: any;
            requestShortener: any;

            outputOptions: any;
            bail: any;
            profile: any;
            performance: any;

            mainTemplate: MainTemplate;
            chunkTemplate: ChunkTemplate;
            hotUpdateChunkTemplate: HotUpdateChunkTemplate;
            runtimeTemplate: RuntimeTemplate;
            moduleTemplates: {
                javascript: ModuleTemplate;
                webassembly: ModuleTemplate;
            };

            isChild(): boolean;
            context: string;
            outputPath: string;

            entries: any[];
            _preparedEntrypoints: any[];
            entrypoints: Map<any, any>;
            chunks: any[];
            chunkGroups: any[];
            namedChunkGroups: Map<any, any>;
            namedChunks: Map<any, any>;
            modules: any[];
            _modules: Map<any, any>;
            cache: any;
            records: any;
            nextFreeModuleIndex: any;
            nextFreeModuleIndex2: any;
            additionalChunkAssets: any[];
            assets: any;
            errors: any[];
            warnings: any[];
            children: any[];
            dependencyFactories: Map<typeof Dependency, Tapable>;
            dependencyTemplates: Map<typeof Dependency, Tapable>;
            childrenCounters: any;
            usedChunkIds: any;
            usedModuleIds: any;
            fileTimestamps: Map<string, number>;
            contextTimestamps: Map<string, number>;
            fileDependencies: SortableSet<string>;
            contextDependencies: SortableSet<string>;
            missingDependencies: SortableSet<string>;
            hash?: string;
            getStats(): Stats;
            addChunkInGroup(groupOptions: GroupOptions): ChunkGroup;
            addChunkInGroup(groupOptions: GroupOptions, module: Module, loc: DependencyLocation, request: string): ChunkGroup;
            addModule(module: CompilationModule, cacheGroup: any): any;
            // tslint:disable-next-line:ban-types
            addEntry(context: any, entry: any, name: any, callback: Function): void;

            getPath(filename: string, data: {
                hash?: any,
                chunk?: any,
                filename?: string,
                basename?: string,
                query?: any,
                contentHashType?: string,
                contentHash?: string,
            }): string;

            getAsset(name: string): Readonly<Asset>;
            updateAsset(
                file: string,
                newSourceOrFunction: Source | ((arg0: Source) => Source),
                assetInfoUpdateOrFunction?: AssetInfo | ((arg0: AssetInfo) => AssetInfo)
            ): void;

            /**
             * @deprecated Compilation.applyPlugins is deprecated. Use new API on `.hooks` instead
             */
            applyPlugins(name: string, ...args: any[]): void;
            getLogger(pluginName: string): Logger;
        }

        interface CompilerHooks {
            shouldEmit: SyncBailHook<Compilation>;
            done: AsyncSeriesHook<Stats>;
            additionalPass: AsyncSeriesHook;
            beforeRun: AsyncSeriesHook<Compiler>;
            run: AsyncSeriesHook<Compiler>;
            emit: AsyncSeriesHook<Compilation>;
            afterEmit: AsyncSeriesHook<Compilation>;
            thisCompilation: SyncHook<Compilation, { normalModuleFactory: NormalModuleFactory }>;
            compilation: SyncHook<Compilation, { normalModuleFactory: NormalModuleFactory }>;
            normalModuleFactory: SyncHook<NormalModuleFactory>;
            contextModuleFactory: SyncHook<ContextModuleFactory>;
            beforeCompile: AsyncSeriesHook<{}>;
            compile: SyncHook<{}>;
            make: AsyncParallelHook<Compilation>;
            afterCompile: AsyncSeriesHook<Compilation>;
            watchRun: AsyncSeriesHook<Compiler>;
            failed: SyncHook<Error>;
            invalid: SyncHook<string, Date>;
            watchClose: SyncHook;
            environment: SyncHook;
            afterEnvironment: SyncHook;
            afterPlugins: SyncHook<Compiler>;
            afterResolvers: SyncHook<Compiler>;
            entryOption: SyncBailHook;
        }

        interface MultiStats {
            stats: Stats[];
            hash: string;
            /** Returns true if there were errors while compiling. */
            hasErrors(): boolean;
            /** Returns true if there were warnings while compiling. */
            hasWarnings(): boolean;
            /** Returns compilation information as a JSON object. */
            toJson(options?: Stats.ToJsonOptions): Stats.ToJsonOutput;
            /** Returns a formatted string of the compilation information (similar to CLI output). */
            toString(options?: Stats.ToStringOptions): string;
        }

        interface MultiCompilerHooks {
            done: SyncHook<MultiStats>;
            invalid: SyncHook<string, Date>;
            run: AsyncSeriesHook<Compiler>;
            watchClose: SyncHook;
            watchRun: AsyncSeriesHook<Compiler>;
        }
    }
    // tslint:disable-next-line:interface-name
    interface ICompiler {
        run(handler: ICompiler.Handler | ICompiler.MultiHandler): void;
        watch(watchOptions: ICompiler.WatchOptions, handler: ICompiler.Handler | ICompiler.MultiHandler): Watching;
    }

    namespace ICompiler {
        import MultiStats = compilation.MultiStats;
        type Handler = (err: Error, stats: Stats) => void;
        type MultiHandler = (err: Error, stats: MultiStats) => void;
        interface WatchOptions {
            /**
             * Add a delay before rebuilding once the first file changed. This allows webpack to aggregate any other
             * changes made during this time period into one rebuild.
             * Pass a value in milliseconds. Default: 300.
             */
            aggregateTimeout?: number;
            /**
             * For some systems, watching many file systems can result in a lot of CPU or memory usage.
             * It is possible to exclude a huge folder like node_modules.
             * It is also possible to use anymatch patterns.
             */
            ignored?: anymatch.Matcher;
            /** Turn on polling by passing true, or specifying a poll interval in milliseconds. */
            poll?: boolean | number;
        }
    }

    interface Watching {
        close(callback: () => void): void;
        invalidate(): void;
    }

    interface InputFileSystem {
        purge?(): void;
        readFile(path: string, callback: (err: Error | undefined | null, contents: Buffer) => void): void;
        readFileSync(path: string): Buffer;
        readlink(path: string, callback: (err: Error | undefined | null, linkString: string) => void): void;
        readlinkSync(path: string): string;
        stat(path: string, callback: (err: Error | undefined | null, stats: any) => void): void;
        statSync(path: string): any;
    }

    interface OutputFileSystem {
        join(...paths: string[]): string;
        mkdir(path: string, callback: (err: Error | undefined | null) => void): void;
        mkdirp(path: string, callback: (err: Error | undefined | null) => void): void;
        rmdir(path: string, callback: (err: Error | undefined | null) => void): void;
        unlink(path: string, callback: (err: Error | undefined | null) => void): void;
        writeFile(path: string, data: any, callback: (err: Error | undefined | null) => void): void;
    }

    interface SortableSet<T> extends Set<T> {
        sortWith(sortFn: (a: T, b: T) => number): void;
        sort(): void;
        getFromCache(fn: (set: SortableSet<T>) => T[]): T[];
        getFromUnorderedCache(fn: (set: SortableSet<T>) => string|number|T[]): any;
    }

    class Compiler extends Tapable implements ICompiler {
        constructor();

        hooks: compilation.CompilerHooks;
        _pluginCompat: SyncBailHook<compilation.Compilation>;

        name: string;
        isChild(): boolean;
        context: string;
        outputPath: string;
        options: Configuration;
        inputFileSystem: InputFileSystem;
        outputFileSystem: OutputFileSystem;
        fileTimestamps: Map<string, number>;
        contextTimestamps: Map<string, number>;
        run(handler: Compiler.Handler): void;
        watch(watchOptions: Compiler.WatchOptions, handler: Compiler.Handler): Compiler.Watching;
        getInfrastructureLogger(name: string): Logger;
    }

    namespace Compiler {
        type Handler = ICompiler.Handler;
        type WatchOptions = ICompiler.WatchOptions;

        class Watching implements Watching {
            constructor(compiler: Compiler, watchOptions: Watching.WatchOptions, handler: Watching.Handler);

            close(callback: () => void): void;
            invalidate(): void;
        }

        namespace Watching {
            type WatchOptions = ICompiler.WatchOptions;
            type Handler = ICompiler.Handler;
        }
    }

    abstract class MultiCompiler extends Tapable implements ICompiler {
        compilers: Compiler[];
        hooks: compilation.MultiCompilerHooks;
        run(handler: MultiCompiler.Handler): void;
        watch(watchOptions: MultiCompiler.WatchOptions, handler: MultiCompiler.Handler): MultiWatching;
    }

    namespace MultiCompiler {
        type Handler = ICompiler.MultiHandler;
        type WatchOptions = ICompiler.WatchOptions;
    }

    abstract class MultiWatching implements Watching {
        close(callback: () => void): void;
        invalidate(): void;
    }

    abstract class Plugin implements Tapable.Plugin {
        apply(compiler: Compiler): void;
    }

    // Compatibility with webpack@5's own types
    // See https://github.com/webpack/webpack/issues/11630
    // tslint:disable-next-line no-empty-interface
    interface WebpackPluginInstance extends Plugin {}

    abstract class ResolvePlugin implements Tapable.Plugin {
        apply(resolver: any /* EnhancedResolve.Resolver */): void;
    }

    class Stats {
        compilation: compilation.Compilation;
        hash?: string;
        startTime?: number;
        endTime?: number;

        static filterWarnings(
          warnings: string[],
          warningsFilter?: Array<string | RegExp | ((warning: string) => boolean)>
        ): string[];
        /**
         * Returns the default json options from the stats preset.
         * @param preset The preset to be transformed into json options.
         */
        static presetToOptions(preset?: Stats.Preset): Stats.ToJsonOptionsObject;

        constructor(compilation: compilation.Compilation);

        formatFilePath(filePath: string): string;
        /** Returns true if there were errors while compiling. */
        hasErrors(): boolean;
        /** Returns true if there were warnings while compiling. */
        hasWarnings(): boolean;
        /** Remove a prefixed "!" that can be specified to reverse sort order */
        normalizeFieldKey(field: string): string;
        /** if a field is prefixed by a "!" reverse sort order */
        sortOrderRegular(field: string): boolean;
        /** Returns compilation information as a JSON object. */
        toJson(options?: Stats.ToJsonOptions, forToString?: boolean): Stats.ToJsonOutput;
        /** Returns a formatted string of the compilation information (similar to CLI output). */
        toString(options?: Stats.ToStringOptions): string;
    }

    namespace Stats {
        type Preset
            = boolean
            | 'errors-only'
            | 'errors-warnings'
            | 'minimal'
            | 'none'
            | 'normal'
            | 'verbose';

        interface ToJsonOptionsObject {
            /** fallback value for stats options when an option is not defined (has precedence over local webpack defaults) */
            all?: boolean;
            /** Add asset Information */
            assets?: boolean;
            /** Sort assets by a field */
            assetsSort?: string;
            /** Add built at time information */
            builtAt?: boolean;
            /** Add information about cached (not built) modules */
            cached?: boolean;
            /** Show cached assets (setting this to `false` only shows emitted files) */
            cachedAssets?: boolean;
            /** Add children information */
            children?: boolean;
            /** Add information about the `namedChunkGroups` */
            chunkGroups?: boolean;
            /** Add built modules information to chunk information */
            chunkModules?: boolean;
            /** Add the origins of chunks and chunk merging info */
            chunkOrigins?: boolean;
            /** Add chunk information (setting this to `false` allows for a less verbose output) */
            chunks?: boolean;
            /** Sort the chunks by a field */
            chunksSort?: string;
            /** Context directory for request shortening */
            context?: string;
            /** Display the distance from the entry point for each module */
            depth?: boolean;
            /** Display the entry points with the corresponding bundles */
            entrypoints?: boolean;
            /** Add --env information */
            env?: boolean;
            /** Add errors */
            errors?: boolean;
            /** Add details to errors (like resolving log) */
            errorDetails?: boolean;
            /** Exclude assets from being displayed in stats */
            excludeAssets?: StatsExcludeFilter;
            /** Exclude modules from being displayed in stats */
            excludeModules?: StatsExcludeFilter;
            /** See excludeModules */
            exclude?: StatsExcludeFilter;
            /** Add the hash of the compilation */
            hash?: boolean;
            /** Set the maximum number of modules to be shown */
            maxModules?: number;
            /** Add built modules information */
            modules?: boolean;
            /** Sort the modules by a field */
            modulesSort?: string;
            /** Show dependencies and origin of warnings/errors */
            moduleTrace?: boolean;
            /** Add public path information */
            publicPath?: boolean;
            /** Add information about the reasons why modules are included */
            reasons?: boolean;
            /** Add the source code of modules */
            source?: boolean;
            /** Add timing information */
            timings?: boolean;
            /** Add webpack version information */
            version?: boolean;
            /** Add warnings */
            warnings?: boolean;
            /** Show which exports of a module are used */
            usedExports?: boolean;
            /** Filter warnings to be shown */
            warningsFilter?: string | RegExp | Array<string | RegExp> | ((warning: string) => boolean);
            /** Show performance hint when file size exceeds `performance.maxAssetSize` */
            performance?: boolean;
            /** Show the exports of the modules */
            providedExports?: boolean;
        }

        type ToJsonOptions = Preset | ToJsonOptionsObject;

        interface ChunkGroup {
            assets: string[];
            chunks: Array<number | string>;
            children: Record<string, {
                assets: string[];
                chunks: Array<number | string>;
                name: string;
            }>;
            childAssets: Record<string, string[]>;
            isOverSizeLimit?: boolean;
        }

        type ReasonType
            = 'amd define'
            | 'amd require array'
            | 'amd require context'
            | 'amd require'
            | 'cjs require context'
            | 'cjs require'
            | 'context element'
            | 'delegated exports'
            | 'delegated source'
            | 'dll entry'
            | 'accepted harmony modules'
            | 'harmony accept'
            | 'harmony export expression'
            | 'harmony export header'
            | 'harmony export imported specifier'
            | 'harmony export specifier'
            | 'harmony import specifier'
            | 'harmony side effect evaluation'
            | 'harmony init'
            | 'import() context development'
            | 'import() context production'
            | 'import() eager'
            | 'import() weak'
            | 'import()'
            | 'json exports'
            | 'loader'
            | 'module.hot.accept'
            | 'module.hot.decline'
            | 'multi entry'
            | 'null'
            | 'prefetch'
            | 'require.context'
            | 'require.ensure'
            | 'require.ensure item'
            | 'require.include'
            | 'require.resolve'
            | 'single entry'
            | 'wasm export import'
            | 'wasm import';

        interface Reason {
            moduleId: number | string | null;
            moduleIdentifier: string | null;
            module: string | null;
            moduleName: string | null;
            type: ReasonType;
            explanation?: string;
            userRequest: string;
            loc: string;
        }

        interface FnModules {
            assets?: string[];
            built: boolean;
            cacheable: boolean;
            chunks: Array<number | string>;
            depth?: number;
            errors: number;
            failed: boolean;
            filteredModules?: boolean;
            id: number | string;
            identifier: string;
            index: number;
            index2: number;
            issuer: string | undefined;
            issuerId: number | string | undefined;
            issuerName: string | undefined;
            issuerPath: Array<{
                id: number | string;
                identifier: string;
                name: string;
                profile: any; // TODO
            }>;
            modules: FnModules[];
            name: string;
            optimizationBailout?: string;
            optional: boolean;
            prefetched: boolean;
            profile: any; // TODO
            providedExports?: any; // TODO
            reasons: Reason[];
            size: number;
            source?: string;
            usedExports?: boolean;
            warnings: number;
        }

        interface ToJsonOutput {
            _showErrors: boolean;
            _showWarnings: boolean;
            assets?: Array<{
                chunks: Array<number | string>;
                chunkNames: string[];
                emitted: boolean;
                isOverSizeLimit?: boolean;
                name: string;
                size: number;
            }>;
            assetsByChunkName?: Record<string, string | string[]>;
            builtAt?: number;
            children?: Array<ToJsonOutput & { name?: string }>;
            chunks?: Array<{
                children: number[];
                childrenByOrder: Record<string, number[]>;
                entry: boolean;
                files: string[];
                filteredModules?: number;
                hash?: string;
                id: number | string;
                initial: boolean;
                modules?: FnModules[];
                names: string[];
                origins?: Array<{
                    moduleId?: string | number;
                    module: string;
                    moduleIdentifier: string;
                    moduleName: string;
                    loc: string;
                    request: string;
                    reasons: string[];
                }>;
                parents: number[];
                reason?: string;
                recorded?: boolean;
                rendered: boolean;
                size: number;
                siblings: number[];
            }>;
            entrypoints?: Record<string, ChunkGroup>;
            errors: string[];
            env?: Record<string, any>;
            filteredAssets?: number;
            filteredModules?: boolean;
            hash?: string;
            modules?: FnModules[];
            namedChunkGroups?: Record<string, ChunkGroup>;
            needAdditionalPass?: boolean;
            outputPath?: string;
            publicPath?: string;
            time?: number;
            version?: string;
            warnings: string[];
        }

        type StatsExcludeFilter = string | string[] | RegExp | RegExp[] | ((assetName: string) => boolean) | Array<(assetName: string) => boolean>;

        interface ToStringOptionsObject extends ToJsonOptionsObject {
            /** `webpack --colors` equivalent */
            colors?: boolean | string;
        }

        type ToStringOptions = Preset | ToStringOptionsObject;
    }

    /**
     * Plugins
     */

    class BannerPlugin extends Plugin {
        constructor(options: string | BannerPlugin.Options);
    }

    namespace BannerPlugin {
        type Filter = string | RegExp;

        interface Options {
            banner: string;
            entryOnly?: boolean;
            exclude?: Filter | Filter[];
            include?: Filter | Filter[];
            raw?: boolean;
            test?: Filter | Filter[];
        }
    }

    class ContextReplacementPlugin extends Plugin {
        constructor(resourceRegExp: any, newContentResource?: any, newContentRecursive?: any, newContentRegExp?: any);
    }

    class DefinePlugin extends Plugin {
        constructor(definitions: {[key: string]: DefinePlugin.CodeValueObject});
        static runtimeValue(
            fn: ({ module }: { module: compilation.Module }) => DefinePlugin.CodeValuePrimitive,
            fileDependencies?: true | string[]
        ): DefinePlugin.RuntimeValue;
    }

    namespace DefinePlugin {
        class RuntimeValue {
            constructor(
                fn: ({ module }: { module: compilation.Module }) => CodeValuePrimitive,
                fileDependencies?: string[]
            );
            exec(parser: compilation.normalModuleFactory.Parser): CodeValuePrimitive;
        }
        type CodeValuePrimitive = string | number | boolean | RegExp | RuntimeValue | null | undefined;
        type CodeValueObject = CodeValuePrimitive | {[key: string]: CodeValueObject};
    }

    class DllPlugin extends Plugin {
        constructor(options: DllPlugin.Options | DllPlugin.Options[]);
    }

    namespace DllPlugin {
        interface Options {
            /**
             * The context of requests in the manifest file.
             *
             * Defaults to the webpack context.
             */
            context?: string;

            /**
             * The name of the exposed DLL function (keep consistent with `output.library`).
             */
            name: string;

            /**
             * The absolute path to the manifest json file (output).
             */
            path: string;
        }
    }

    class DllReferencePlugin extends Plugin {
        constructor(options: DllReferencePlugin.Options);
    }

    namespace DllReferencePlugin {
        interface Options {
            /**
             * The mappings from the request to module ID.
             *
             * Defaults to `manifest.content`.
             */
            content?: any;

            /**
             * The context of requests in the manifest (or content property).
             *
             * This is an <b>absolute path</b>.
             */
            context: string;

            /**
             * An object containing `content` and `name`.
             */
            manifest: { content: string, name: string } | string;

            /**
             * The name where the DLL is exposed.
             *
             * Defaults to `manifest.name`.
             *
             * See also `externals`.
             */
            name?: string;

            /**
             * The prefix which is used for accessing the content of the DLL.
             */
            scope?: string;

            /**
             * The type how the DLL is exposed.
             *
             * Defaults to `"var"`.
             *
             * See also `externals`.
             */
            sourceType?: string;
        }
    }

    class EvalSourceMapDevToolPlugin extends Plugin {
        constructor(options?: false | string | EvalSourceMapDevToolPlugin.Options);
    }

    namespace EvalSourceMapDevToolPlugin {
        interface Options {
            append?: false | string;
            columns?: boolean;
            lineToLine?: boolean | {
                exclude?: Condition | Condition[];
                include?: Condition | Condition[];
                test?: Condition | Condition[];
            };
            module?: boolean;
            moduleFilenameTemplate?: string;
            sourceRoot?: string;
        }
    }

    class ExtendedAPIPlugin extends Plugin {
        constructor();
    }

    class ExternalsPlugin extends Plugin {
        constructor(type: string, externals: ExternalsElement);
    }

    class HashedModuleIdsPlugin extends Plugin {
        constructor(options?: {
            hashFunction?: string,
            hashDigest?: string,
            hashDigestLength?: number
        });
    }

    class HotModuleReplacementPlugin extends Plugin {
        constructor(options?: any);
    }

    class IgnorePlugin extends Plugin {
        constructor(requestRegExp: any, contextRegExp?: any);
    }

    class LoaderOptionsPlugin extends Plugin {
        constructor(options: any);
    }

    /** @deprecated use config.optimization.namedModules */
    class NamedModulesPlugin extends Plugin {
        constructor();
    }

    class NamedChunksPlugin extends Plugin {
        constructor(nameResolver?: (chunk: any) => string | null);
    }

    /** @deprecated use config.optimization.noEmitOnErrors */
    class NoEmitOnErrorsPlugin extends Plugin {
        constructor();
    }

    class NormalModuleReplacementPlugin extends Plugin {
        constructor(resourceRegExp: any, newResource: any);
    }

    class PrefetchPlugin extends Plugin {
        // tslint:disable-next-line:unified-signatures
        constructor(context: any, request: any);
        constructor(request: any);
    }

    class ProgressPlugin extends Plugin {
        constructor(options?: ProgressPlugin.Options | ProgressPlugin.Handler);
    }

    namespace ProgressPlugin {
        /**
         * A handler function which will be called when webpack hooks report progress
         */
        type Handler = (percentage: number, msg: string, ...args: string[]) => void;
        interface Options {
            /**
             * Show active modules count and one active module in progress message
             * Default: true
             */
            activeModules?: boolean;
            /**
             * Show entries count in progress message
             * Default: false
             */
            entries?: boolean;
            /**
             * Function that executes for every progress step
             */
            handler?: Handler;
            /**
             * Show modules count in progress message
             * Default: true
             */
            modules?: boolean;
            /**
             * Minimum modules count to start with, only for mode = modules
             * Default: 500
             */
            modulesCount?: number;
            /**
             * Collect profile data for progress steps
             * Default: false
             */
            profile?: boolean | null;
        }
    }

    class EnvironmentPlugin extends Plugin {
        constructor(envs: string[] | { [key: string]: any });
    }

    class ProvidePlugin extends Plugin {
        constructor(definitions: { [key: string]: any });
    }

    class SplitChunksPlugin extends Plugin {
        constructor(options?: Options.SplitChunksOptions);
    }

    class SourceMapDevToolPlugin extends Plugin {
        constructor(options?: null | false | string | SourceMapDevToolPlugin.Options);
    }

    namespace SourceMapDevToolPlugin {
        /** @todo extend EvalSourceMapDevToolPlugin.Options */
        interface Options {
            append?: false | string;
            columns?: boolean;
            exclude?: Condition | Condition[];
            fallbackModuleFilenameTemplate?: string;
            filename?: null | false | string;
            include?: Condition | Condition[];
            lineToLine?: boolean | {
                exclude?: Condition | Condition[];
                include?: Condition | Condition[];
                test?: Condition | Condition[];
            };
            module?: boolean;
            moduleFilenameTemplate?: string;
            noSources?: boolean;
            publicPath?: string;
            sourceRoot?: null | string;
            test?: Condition | Condition[];
        }
    }

    class WatchIgnorePlugin extends Plugin {
        constructor(paths: Array<string | RegExp>);
    }

    class SingleEntryPlugin extends Plugin {
        constructor(context: string, entry: string, name: string);
    }

    namespace optimize {
        /** @deprecated use config.optimization.concatenateModules */
        class ModuleConcatenationPlugin extends Plugin { }
        class AggressiveMergingPlugin extends Plugin {
            constructor(options?: AggressiveMergingPlugin.Options);
        }

        namespace AggressiveMergingPlugin {
            interface Options {
                /**
                 * When options.moveToParents is set, moving to an entry chunk is more expensive.
                 * Defaults to 10, which means moving to an entry chunk is ten times more expensive than moving to a
                 * normal chunk.
                 */
                entryChunkMultiplicator?: number;
                /**
                 * A factor which defines the minimum required size reduction for chunk merging.
                 * Defaults to 1.5 which means that the total size needs to be reduced by 50% for chunk merging.
                 */
                minSizeReduce?: number;
                /**
                 * When set, modules that are not in both merged chunks are moved to all parents of the chunk.
                 * Defaults to false.
                 */
                moveToParents?: boolean;
            }
        }

        class AggressiveSplittingPlugin extends Plugin {
            constructor(options?: AggressiveSplittingPlugin.Options);
        }

        namespace AggressiveSplittingPlugin {
            interface Options {
                /**
                 * Size in byte.
                 * Only chunks bigger than the specified minSize are stored in records.
                 * This ensures the chunks fill up as your application grows,
                 * instead of creating too many chunks for every change.
                 *
                 * Default: 30720
                 */
                minSize: 30000;
                /**
                 * Size in byte.
                 * maximum size prefered for each chunk.
                 *
                 * Default: 51200
                 */
                maxSize: 50000;
                chunkOverhead: 0;
                entryChunkMultiplicator: 1;
            }
        }

        /** @deprecated */
        class DedupePlugin extends Plugin {
            constructor();
        }

        class LimitChunkCountPlugin extends Plugin {
            constructor(options: any);
        }

        class MinChunkSizePlugin extends Plugin {
            constructor(options: any);
        }

        class OccurrenceOrderPlugin extends Plugin {
            constructor(preferEntry: boolean);
        }

        class UglifyJsPlugin extends Plugin {
            constructor(options?: UglifyJsPlugin.Options);
        }

        namespace UglifyJsPlugin {
            type CommentFilter = (astNode: any, comment: any) => boolean;

            interface Options extends UglifyJS.MinifyOptions {
                beautify?: boolean;
                comments?: boolean | RegExp | CommentFilter;
                exclude?: Condition | Condition[];
                include?: Condition | Condition[];
                /** Parallelization can speedup your build significantly and is therefore highly recommended. */
                parallel?: boolean | { cache: boolean, workers: boolean | number };
                sourceMap?: boolean;
                test?: Condition | Condition[];
            }
        }
    }

    namespace dependencies {
    }

    namespace loader {
        interface Loader extends Function {
            (this: LoaderContext, source: string | Buffer, sourceMap?: RawSourceMap): string | Buffer | void | undefined;

            /**
             * The order of chained loaders are always called from right to left.
             * But, in some cases, loaders do not care about the results of the previous loader or the resource.
             * They only care for metadata. The pitch method on the loaders is called from left to right before the loaders are called (from right to left).
             * If a loader delivers a result in the pitch method the process turns around and skips the remaining loaders,
             * continuing with the calls to the more left loaders. data can be passed between pitch and normal call.
             */
            pitch?(this: LoaderContext, remainingRequest: string, precedingRequest: string, data: any): any;

            /**
             * By default, the resource file is treated as utf-8 string and passed as String to the loader.
             * By setting raw to true the loader is passed the raw Buffer.
             * Every loader is allowed to deliver its result as String or as Buffer.
             * The compiler converts them between loaders.
             */
            raw?: boolean;
        }

        type loaderCallback = (
            err: Error | undefined | null,
            content?: string | Buffer,
            sourceMap?: string | RawSourceMap
        ) => void;

        interface LoaderContext {
            /**
             * Loader API version. Currently 2.
             * This is useful for providing backwards compatibility.
             * Using the version you can specify custom logic or fallbacks for breaking changes.
             */
            version: string;

            /**
             *  The directory of the module. Can be used as context for resolving other stuff.
             *  In the example: /abc because resource.js is in this directory
             */
            context: string;

            /**
             * Starting with webpack 4, the formerly `this.options.context` is provided as `this.rootContext`.
             */
            rootContext: string;

            /**
             * The resolved request string.
             * In the example: "/abc/loader1.js?xyz!/abc/node_modules/loader2/index.js!/abc/resource.js?rrr"
             */
            request: string;

            /**
             *  A string or any object. The query of the request for the current loader.
             */
            query: any;

            /**
             * A data object shared between the pitch and the normal phase.
             */
            data?: any;

            callback: loaderCallback;

            /**
             * Make this loader async.
             */
            async(): loaderCallback | undefined;

            /**
             *  Make this loader result cacheable. By default it's not cacheable.
             *  A cacheable loader must have a deterministic result, when inputs and dependencies haven't changed.
             *  This means the loader shouldn't have other dependencies than specified with this.addDependency.
             *  Most loaders are deterministic and cacheable.
             */
            cacheable(flag?: boolean): void;

            /**
             * An array of all the loaders. It is writeable in the pitch phase.
             * loaders = [{request: string, path: string, query: string, module: function}]
             *
             * In the example:
             * [
             *   { request: "/abc/loader1.js?xyz",
             *     path: "/abc/loader1.js",
             *     query: "?xyz",
             *     module: [Function]
             *   },
             *   { request: "/abc/node_modules/loader2/index.js",
             *     path: "/abc/node_modules/loader2/index.js",
             *     query: "",
             *     module: [Function]
             *   }
             * ]
             */
            loaders: any[];

            /**
             * The index in the loaders array of the current loader.
             * In the example: in loader1: 0, in loader2: 1
             */
            loaderIndex: number;

            /**
             * The resource part of the request, including query.
             * In the example: "/abc/resource.js?rrr"
             */
            resource: string;

            /**
             * The resource file.
             * In the example: "/abc/resource.js"
             */
            resourcePath: string;

            /**
             * The query of the resource.
             * In the example: "?rrr"
             */
            resourceQuery: string;

            /**
             * Emit a warning.
             */
            emitWarning(message: string | Error): void;

            /**
             * Emit a error.
             */
            emitError(message: string | Error): void;

            /**
             * Execute some code fragment like a module.
             *
             * Don't use require(this.resourcePath), use this function to make loaders chainable!
             *
             */
            exec(code: string, filename: string): any;

            /**
             * Resolves the given request to a module, applies all configured loaders and calls
             * back with the generated source, the sourceMap and the module instance (usually an
             * instance of NormalModule). Use this function if you need to know the source code
             * of another module to generate the result.
             */
            loadModule(request: string, callback: (err: Error | null, source: string, sourceMap: RawSourceMap, module: Module) => void): any;

            /**
             * Resolve a request like a require expression.
             */
            resolve(context: string, request: string, callback: (err: Error, result: string) => void): any;

            /**
             * Resolve a request like a require expression.
             */
            resolveSync(context: string, request: string): string;

            /**
             * Adds a file as dependency of the loader result in order to make them watchable.
             * For example, html-loader uses this technique as it finds src and src-set attributes.
             * Then, it sets the url's for those attributes as dependencies of the html file that is parsed.
             */
            addDependency(file: string): void;

            /**
             * Adds a file as dependency of the loader result in order to make them watchable.
             * For example, html-loader uses this technique as it finds src and src-set attributes.
             * Then, it sets the url's for those attributes as dependencies of the html file that is parsed.
             */
            dependency(file: string): void;

            /**
             * Add a directory as dependency of the loader result.
             */
            addContextDependency(directory: string): void;

            /**
             * Remove all dependencies of the loader result. Even initial dependencies and these of other loaders. Consider using pitch.
             */
            clearDependencies(): void;

            /**
             * Pass values to the next loader.
             * If you know what your result exports if executed as module, set this value here (as a only element array).
             */
            value: any;

            /**
             * Passed from the last loader.
             * If you would execute the input argument as module, consider reading this variable for a shortcut (for performance).
             */
            inputValue: any;

            /**
             * A boolean flag. It is set when in debug mode.
             */
            debug: boolean;

            /**
             * Should the result be minimized.
             */
            minimize: boolean;

            /**
             * Should a SourceMap be generated.
             */
            sourceMap: boolean;

            /**
             * Target of compilation. Passed from configuration options.
             * Example values: "web", "node"
             */
            target: 'web' | 'webworker' | 'async-node' | 'node' | 'electron-main' | 'electron-renderer' | 'node-webkit' | string;

            /**
             * This boolean is set to true when this is compiled by webpack.
             *
             * Loaders were originally designed to also work as Babel transforms.
             * Therefore if you write a loader that works for both, you can use this property to know if
             * there is access to additional loaderContext and webpack features.
             */
            webpack: boolean;

            /**
             * Emit a file. This is webpack-specific.
             */
            emitFile(name: string, content: Buffer | string, sourceMap: any): void;

            /**
             * Access to the compilation's inputFileSystem property.
             */
            fs: any;

            /**
             * Which mode is webpack running.
             */
            mode: 'production' | 'development' | 'none';

            /**
             * Hacky access to the Compilation object of webpack.
             */
            _compilation: any;

            /**
             * Hacky access to the Compiler object of webpack.
             */
            _compiler: Compiler;

            /**
             * Hacky access to the Module object being loaded.
             */
            _module: any;

            /** Flag if HMR is enabled */
            hot: boolean;
        }
    }

    namespace Template {
        function getFunctionContent(fn: (...args: any[]) => any): string;

        function toIdentifier(str: string): string;

        function toComment(str: string): string;

        function toNormalComment(str: string): string;

        function toPath(str: string): string;

        function numberToIdentifer(n: number): string;

        function indent(s: string | string[]): string;

        function prefix(s: string | string[], prefix: string): string;

        function asString(str: string | string[]): string;

        function getModulesArrayBounds(modules: ReadonlyArray<{
            id: string | number;
        }>): [number, number] | false;

        function renderChunkModules(
            chunk: compilation.Chunk,
            filterFn: (module: compilation.Module, num: number) => boolean,
            moduleTemplate: compilation.ModuleTemplate,
            dependencyTemplates: any,
            prefix?: string,
        ): ConcatSource;
    }

    /** @deprecated */
    namespace compiler {
        /** @deprecated use webpack.Compiler */
        // tslint:disable-next-line:no-unnecessary-qualifier
        type Compiler = webpack.Compiler;

        /** @deprecated use webpack.Compiler.Watching */
        type Watching = Compiler.Watching;

        /** @deprecated use webpack.Compiler.WatchOptions */

        type WatchOptions = Compiler.WatchOptions;

        /** @deprecated use webpack.Stats */
        // tslint:disable-next-line:no-unnecessary-qualifier
        type Stats = webpack.Stats;

        /** @deprecated use webpack.Stats.ToJsonOptions */
        type StatsOptions = Stats.ToJsonOptions;

        /** @deprecated use webpack.Stats.ToStringOptions */
        type StatsToStringOptions = Stats.ToStringOptions;

        /** @deprecated use webpack.Compiler.Handler */
        type CompilerCallback = Compiler.Handler;
    }

    /** @deprecated use webpack.Options.Performance */
    type PerformanceOptions = Options.Performance;
    /** @deprecated use webpack.Options.WatchOptions */
    type WatchOptions = Options.WatchOptions;
    /** @deprecated use webpack.EvalSourceMapDevToolPlugin.Options */
    type EvalSourceMapDevToolPluginOptions = EvalSourceMapDevToolPlugin.Options;
    /** @deprecated use webpack.SourceMapDevToolPlugin.Options */
    type SourceMapDevToolPluginOptions = SourceMapDevToolPlugin.Options;
    /** @deprecated use webpack.optimize.UglifyJsPlugin.CommentFilter */
    type UglifyCommentFunction = optimize.UglifyJsPlugin.CommentFilter;
    /** @deprecated use webpack.optimize.UglifyJsPlugin.Options */
    type UglifyPluginOptions = optimize.UglifyJsPlugin.Options;
}