illustration for JavaScript Promises in Depth

JavaScript Promises in Depth

Instructor

Marius Schulz
1h 7m closed-captioning
Star icon$$$
Star icon$$$
Star icon$$$
Star icon$$$
Star icon$$$
4.7
1416
people completed
Bookmark
Download
RSS

ES2015 brought a native Promise to the JavaScript standard library. In this course, we’re going to take an in-depth look at how to use promises to model various kinds of asynchronous operations.

First, we’re going to explore how to create promises using the Promise constructor or the Promise.resolve() or Promise.reject() methods. Then, we’re going to see how to chain promises together using .then(), .catch(), and .finally(). We’re going to compare various error handling strategies along the way. We’re going to wrap up this course by taking a look at how to deal with multiple promises using Promise.all() and Promise.race() and how to await a promise using the await operator.

Credits

Aleksander Ageev (illustration)

Learner Reviews

  • Pablo Rodriguez
    3 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    content was really good , very good explained

  • Marcell Ciszek
    4 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    Great course Marius! Well explained and I got to learn some new things that I never knew before .

  • Juan Diaz
    4 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    I liked how well structured it is. It's very straightforward and goes in depth, just as the course title suggests. Thank you so much!

  • Learner
    4 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    Love the mix of fundamentals and cutting edge es2020 syntax. Thanks!

  • jean-claude brantschen
    4 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    It’s a cool topic and very well explained with lots of examples. Each lesson is short and handles a single topic.

  • momin khalil
    4 years ago
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    Star icon$$$
    What did you like about this course?

    Though at times it was moving a bit fast for me, with paying attention to the screen and understanding what was going on. After I have completed this course now I feel pretty good about how promises work in Javascript. Your examples were spot on :). Thank you for taking the time a developing this course to clear the cloud around promises. Promises, this and closures are some of the most confusing aspects of javascript.

Course Content

1h 7m • 13 lessons

    You might also like these resources:

    illustration for Introduction to Cloudflare Workers

    Introduction to Cloudflare Workers

    Kristian Freeman・36m・Course

    Become familiar with the Workers CLI wrangler that we will use to bootstrap our Worker project. From there you'll understand how a Worker receives and returns requests/Responses. We will also build this serverless function locally for development and deploy it to a custom domain.

    illustration for Create an eCommerce Store with Next.js and Stripe Checkout

    Create an eCommerce Store with Next.js and Stripe Checkout

    Colby Fayock・1h 4m・Course

    This is a practical project based look at building a working e-commerce store using modern tools and APIs. Excellent for a weekend side-project for your developer project portfolio

    illustration for Practical Git for Everyday Professional Use

    Practical Git for Everyday Professional Use

    Trevor Miller・1h・Course

    git is a critical component in the modern web developers tool box. This course is a solid introduction and goes beyond the basics with some more advanced git commands you are sure to find useful.