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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?
616
js modules.
Top level await You can use the await keyword on its own (outside of an async function) within a JavaScript module. This means modules, with child modules that use await , wait for the child module to execute before they themselves run. All while not blocking other child modules from loading.
Node. js 7.6 has shipped with official support for async / await enabled by default and better performance on low-memory devices.
Async functions are available natively in Node and are denoted by the async keyword in their declaration. They always return a promise, even if you don't explicitly write them to do so. Also, the await keyword is only available inside async functions at the moment – it cannot be used in the global scope.
node --experimental-repl-await
works for the Node REPL
edit: the Node 16 REPL accepts top level await by default, you don't need the experimental flag anymore
99
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.
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