Wait in an async function

When you have an async function, you might need to delay part of the execution. Do something, wait a bit, then do something else.

How to do this?

With Promises, it is a matter of adding a Promise that resolve after some time:

.then(() => {
  // wait a little...
})

But how to wait?

You can combine the Promise constructor with a setTimeout:

new Promise((res) => setTimeout(res, 1000));

This Promise waits 1 second and then resolves. So a waiting step looks like this:

.then(() => {
  return new Promise((res) => setTimeout(res, 1000));
})

Then if you use async/await you can simply await this Promise:

// do something
await new Promise((res) => setTimeout(res, 1000));
// do something else

This will have the effect of pausing the execution for 1 second.

Try it

• https://gist.run/?id=c7e8d196185c03e4430e10fc9cdba383