How to know if a function is async?

Question

I have to pass a function to another function, and execute it as a callback. The problem is that sometimes this function is async, like:

async function() {
          


        

Answer 1

It seems that await can be used for normal functions too. I'm not sure if it can be considered "good practice" but here it is:

async function asyncFn() {
  // await for some async stuff
  return 'hello from asyncFn' 
}

function syncFn() {
  return 'hello from syncFn'
}

async function run() {
  console.log(await asyncFn()) // 'hello from asyncFn'
  console.log(await syncFn()) // 'hello from syncFn'
}

run()