events.d.ts
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declare module "events" {
interface EventEmitterOptions {
/**
* Enables automatic capturing of promise rejection.
*/
captureRejections?: boolean;
}
interface NodeEventTarget {
once(event: string | symbol, listener: (...args: any[]) => void): this;
}
interface DOMEventTarget {
addEventListener(event: string, listener: (...args: any[]) => void, opts?: { once: boolean }): any;
}
namespace EventEmitter {
function once(emitter: NodeEventTarget, event: string | symbol): Promise<any[]>;
function once(emitter: DOMEventTarget, event: string): Promise<any[]>;
function on(emitter: EventEmitter, event: string): AsyncIterableIterator<any>;
const captureRejectionSymbol: unique symbol;
/**
* This symbol shall be used to install a listener for only monitoring `'error'`
* events. Listeners installed using this symbol are called before the regular
* `'error'` listeners are called.
*
* Installing a listener using this symbol does not change the behavior once an
* `'error'` event is emitted, therefore the process will still crash if no
* regular `'error'` listener is installed.
*/
const errorMonitor: unique symbol;
/**
* Sets or gets the default captureRejection value for all emitters.
*/
let captureRejections: boolean;
interface EventEmitter extends NodeJS.EventEmitter {
}
class EventEmitter {
constructor(options?: EventEmitterOptions);
/** @deprecated since v4.0.0 */
static listenerCount(emitter: EventEmitter, event: string | symbol): number;
static defaultMaxListeners: number;
/**
* This symbol shall be used to install a listener for only monitoring `'error'`
* events. Listeners installed using this symbol are called before the regular
* `'error'` listeners are called.
*
* Installing a listener using this symbol does not change the behavior once an
* `'error'` event is emitted, therefore the process will still crash if no
* regular `'error'` listener is installed.
*/
static readonly errorMonitor: unique symbol;
}
}
global {
namespace NodeJS {
interface EventEmitter {
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
on(event: string | symbol, listener: (...args: any[]) => void): this;
once(event: string | symbol, listener: (...args: any[]) => void): this;
removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
off(event: string | symbol, listener: (...args: any[]) => void): this;
removeAllListeners(event?: string | symbol): this;
setMaxListeners(n: number): this;
getMaxListeners(): number;
listeners(event: string | symbol): Function[];
rawListeners(event: string | symbol): Function[];
emit(event: string | symbol, ...args: any[]): boolean;
listenerCount(event: string | symbol): number;
// Added in Node 6...
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
eventNames(): Array<string | symbol>;
}
}
}
export = EventEmitter;
}