`function` Declarations Are Function Scoped, But `async Function` Declarations Are Block Scoped?

Should the following code work? if(true) { async function bar() { console.log('hello'); } } bar(); Chrome 80 and Firefox 72 both throw a ReferenceError saying bar is not d

Solution 1:

It seems like async function bar() {...} declarations are block scoped

Yes, just like normal. Function declarations are block-scoped in general.

… whereas function bar() {...} declarations are function scoped?

Not really, except in sloppy mode for legacy reasons. This does not affect async function and function* declarations, which don't need any backwards-compatibility.