Bug Report
🔎 Search Terms
missing, await, async, commonjs, import, dynamic import, syntax error
🕗 Version & Regression Information
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about the dynamic import function
- TypeScript versions:
next, 4.7.4, 4.6.4, 3.9.19
⏯ Playground Link
Playground link with relevant code
💻 Code
const getPath = async () => {
/* in reality this would do some async FS operation, or a web request */
return "/root/my/cool/path";
};
const someFunction = async () => {
const result = await import(await getPath());
console.log(result);
};
someFunction();Generated JavaScript:
const getPath = async () => {
/* in reality this would do some async FS operation, or a web request */
return "/root/my/cool/path";
};
const someFunction = async () => {
const result = await Promise.resolve().then(() => require(await getPath()));
console.log(result);
};
someFunction();The issue also occurs when both functions are exported:
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.someFunction = exports.getPath = void 0;
const getPath = async () => {
/* in reality this would do some async FS operation, or a web request */
return "/root/my/cool/path";
};
exports.getPath = getPath;
const someFunction = async () => {
const result = await Promise.resolve().then(() => require(await (0, exports.getPath)()));
console.log(result);
};
exports.someFunction = someFunction;
(0, exports.someFunction)();🙁 Actual behavior
tsc emits code without the await keyword, causing a SyntaxError at runtime:
const result = await Promise.resolve().then(() => require(await getPath()));
/Users/xxx/Projects/testing/test-ts/src/index.js:6
const result = await Promise.resolve().then(() => require(await getPath()));
^^^^^
SyntaxError: missing ) after argument list
🙂 Expected behavior
tsc emits code with an await included before the promise callback definition:
const result = await Promise.resolve().then(async () => require(await getPath()));
Or an equivalent promise chain:
const result = getPath().then((path) => require(path));
Bug Report
🔎 Search Terms
missing, await, async, commonjs, import, dynamic import, syntax error
🕗 Version & Regression Information
next,4.7.4,4.6.4,3.9.19⏯ Playground Link
Playground link with relevant code
💻 Code
Generated JavaScript:
The issue also occurs when both functions are exported:
🙁 Actual behavior
tscemits code without theawaitkeyword, causing a SyntaxError at runtime:🙂 Expected behavior
tscemits code with anawaitincluded before the promise callback definition:Or an equivalent promise chain: