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`Object` variable declaration conflicts on commonjs

See original GitHub issue

TypeScript Version: 3.7.x-dev.20191203

Search Terms:

Code

export default {}
const Object = {};

Expected behavior:

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
{
exports.default = {};
const Object = {};
}

no error

Actual behavior:

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = {};
const Object = {};

VM69:2 Uncaught ReferenceError: Cannot access 'Object' before initialization
    at eval (eval at <anonymous> (main-3.js:1239), <anonymous>:2:1)
    at main-3.js:1239

Playground Link: http://www.typescriptlang.org/play/index.html?module=1#code/KYDwDg9gTgLgBAE2AMwIYFcA28DeBfAKAGMIA7AZ3gHkAjAK2CPgF458BuIA

Related Issues:

Issue Analytics

State:
Created 4 years ago
Comments:7 (7 by maintainers)

Top GitHub Comments

1reaction

falsandtrucommented, Jan 29, 2020

Note that you must not make import { Object } from '...' an error because it won’t be a runtime error.

0reactions

falsandtrucommented, Jan 27, 2020

Node.js is a user of this technique too.

https://github.com/nodejs/node/search?l=JavaScript&q=primordials+Object

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