no-invalid-this.js
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"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const no_invalid_this_1 = __importDefault(require("eslint/lib/rules/no-invalid-this"));
const util_1 = require("../util");
exports.default = util_1.createRule({
name: 'no-invalid-this',
meta: {
type: 'suggestion',
docs: {
description: 'Disallow `this` keywords outside of classes or class-like objects',
category: 'Best Practices',
recommended: false,
extendsBaseRule: true,
},
messages: (_a = no_invalid_this_1.default.meta.messages) !== null && _a !== void 0 ? _a : {
unexpectedThis: "Unexpected 'this'.",
},
schema: no_invalid_this_1.default.meta.schema,
},
defaultOptions: [{ capIsConstructor: true }],
create(context) {
const rules = no_invalid_this_1.default.create(context);
/**
* Since function definitions can be nested we use a stack storing if "this" is valid in the current context.
*
* Example:
*
* function a(this: number) { // valid "this"
* function b() {
* console.log(this); // invalid "this"
* }
* }
*
* When parsing the function declaration of "a" the stack will be: [true]
* When parsing the function declaration of "b" the stack will be: [true, false]
*/
const thisIsValidStack = [];
return Object.assign(Object.assign({}, rules), { ClassProperty() {
thisIsValidStack.push(true);
},
'ClassProperty:exit'() {
thisIsValidStack.pop();
},
FunctionDeclaration(node) {
thisIsValidStack.push(node.params.some(param => param.type === experimental_utils_1.AST_NODE_TYPES.Identifier && param.name === 'this'));
// baseRule's work
rules.FunctionDeclaration(node);
},
'FunctionDeclaration:exit'(node) {
thisIsValidStack.pop();
// baseRule's work
rules['FunctionDeclaration:exit'](node);
},
FunctionExpression(node) {
thisIsValidStack.push(node.params.some(param => param.type === experimental_utils_1.AST_NODE_TYPES.Identifier && param.name === 'this'));
// baseRule's work
rules.FunctionExpression(node);
},
'FunctionExpression:exit'(node) {
thisIsValidStack.pop();
// baseRule's work
rules['FunctionExpression:exit'](node);
},
ThisExpression(node) {
const thisIsValidHere = thisIsValidStack[thisIsValidStack.length - 1];
if (thisIsValidHere) {
return;
}
// baseRule's work
rules.ThisExpression(node);
} });
},
});
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