Top-level await doesn't work in the latest Node.js

问题

Is top-level await still not supported in Node.js (Jan 2020, Node.js 13.5.0)?

I've tried some tutorials, like this one, but still no luck, always getting the same error:

D:\NodeJS>node --experimental-modules test.js
(node:17724) ExperimentalWarning: The ESM module loader is experimental.
file:///D:/NodeJS/test.js:9
await test();
^^^^^

SyntaxError: Unexpected reserved word

The entire file content:

function test() {
}

await test();

I have tried using "type": "module" in package.json, and renaming file into test.mjs, but still the same error, even with the latest Node.js 13.5.0

What am I doing wrong?

回答1:

Per this issue tracker and this blog post, top-level await is available in Node v13.3+ behind the flag --harmony-top-level-await. The module flag you're enabling is only for ESM modules and not for top level await.

回答2:

I think you are missing the async annotation

async function test() {
}

await test();

来源：https://stackoverflow.com/questions/59585793/top-level-await-doesnt-work-in-the-latest-node-js