Await is only valid in async function

[pinage404]

await is syntax sugar around Promise

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There is two cases to use await :

1. outside of any function / at top level
2. in a function

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For the first case, the specification is currently in progress and will come in the future

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For the second case, a function that call a Promise must :

• give a callback that will be executed after the Promise finished the asynchronous task
• let the Promise do side-effect
• return a Promise

If you care about the result of the Promise and want to wait before executing others instructions, that means that this function will wait for an asynchronous task, and be asynchronous as well, that why the async keyword is required

[denysdovhan]

This is more like a question. A top-level await is coming.