Can we execute callback to JavaScript's forEach asynchronously?

Question

var a = [1,2,3,4,5,6,7,8,9,10];

a.forEach(item => {
  ...
});
console.log('all done');

Is it ever possible in browser or node environment that it console 'all done' before the forEach completes its execution? If yes then when?

Answer 1

No. Your code is synchronous so it can never happen unless you explicitly execute the .forEach function in an async block.

Answer 2

No. forEach is a synchronous function.

It is possible to call asynchronous functions from within it, and they might not have completed, but the loop itself will have done.