Handling Promises in JavaScript

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When working with promises in JavaScript, the then method is triggered upon resolution of a promise, the catch method is activated when a promise is rejected, and the finally method is executed irrespective of the promise's outcome.

In this 3-course series, Scott and Wes serve up some JavaScript Promises treats. In part 1, they unravel the concept of promises and delve into common examples of their usage, from creating and waiting on promises, to database queries and user permissions.

Show Notes

00:00 Welcome to Syntax!
01:27 Brought to you by Sentry.io.
02:32 What is a promise?
Promise mdn web docs.
03:27 Common examples of promises.
- 03:45 A fetch call to an API returns a promise.
- 05:54 A database query or Insert command
- 07:18 A request for user permissions.
- 07:37 A wait function.
08:08 Resolve or rejecting promises.
09:33 Creating promises.
- 09:46 New promise.
- 11:09 Promise.withResolvers().
- 11:37 An async function.
14:34 Waiting on a promise.
- 15:09 .then().
- 16:50 Await.
- 17:44 Why use one wait method over the other?