Top level await not working in ECMAScript

I am rather confused as I have read that top level await is supported in ESM but when I try it out in a html file it does not work?

Were I found that is says:
Top-level await does not work with node 14.13.-
"Top-level await only works with ESM modules"

Is top level await supported in ESM and if how can I use it.

Thanks in advanced!

>Solution :

Yes, it’s supported in ESM – ES6 modules. It’s not supported in plain script tags.

<script>
await Promise.resolve();
</script>

You need to specify that the script is a module for it to work.

<script type="module">
await Promise.resolve();
console.log('finished successfully');
</script>

(Also make sure that you’re running this in a supported environment – older environments may not support top-level await)