Open
Description
TypeScript Version: 3.1.1
Search Terms: __importStar tslib
Code
a.ts:
import('b').then(b => console.log(b));
compile with
tsc a.ts --esModuleInterop --importHelpers
Expected behavior:
some type errors, but emitted code should require("tslib")
and use __importStar from there
Actual behavior:
some type errors and generated code looks like this:
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
result["default"] = mod;
return result;
};
Promise.resolve().then(function () { return __importStar(require('b')); }).then(function (b) { return console.log(b); });
btw an example that works correctly:
import('c').then(b => console.log(b));
class Foo {}
export class Bar extends Foo {}
both the extends and the export seem to be necessary
Playground Link: N/A (--esModuleInterop doesn't exist in the playground)
Related Issues: This is basically #21560 but replacing regular imports with dynamic imports