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JavaScript Promises

Google via Udacity


Learn how to handle asynchronous work with ease! In this course, you'll use Native JavaScript Promises to write asynchronous code that is easy to read, easy to write and easy to debug.

Along the way, you'll be using Promises to make a webapp come to life!

Why Take This Course?

Every web developer needs to be able to work with asynchronous code. Network requests, browser events, web workers and just about every else about the web happens asynchronously.

JavaScript developers normally rely on callbacks to execute async code, but Native JavaScript Promises offer a much easier solution. With Promises, error handling is streamlined and it becomes possible to flexibly chain lots of asynchronous work without creating a tangled mess of callbacks.


Lesson 1 - Creating Promises

  • Why Promises?
  • Promises syntax and scope
  • Simplifying common, useful methods with Promises
  • Basic error handling

Lesson 2 - Chaining Promises

  • Creating sequences of async work manually
  • Advanced error handling
  • Techniques for generating sequences of async work with array methods


Throughout the course (mostly in the second lesson), you'll be using Promises to load data into the Exoplanet Explorer app, which was designed to help people learn a little bit about planets around other stars.

Taught by

Cameron Pittman

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5.0 rating, based on 5 reviews

Start your review of JavaScript Promises

  • Profile image for Joya Khan
    Joya Khan
    My overall college experience has been quite enjoyable. This is because, the staff are friendly, proffessional and understanding to any needs that you may have. The facilities within the college campus are good as you can use all of the buildings facilities and not just the universities.
  • Anonymous

    Anonymous completed this course.

    I just finished this course. It was a great course to learn promises. I feel a lot more confident about promises now with resolve, reject, .then, and .all. I recommend this course.
  • Profile image for Hemantha Abeywardena
    Hemantha Abeywardena

    Hemantha Abeywardena completed this course, spending 6 hours a week on it and found the course difficulty to be medium.

    This course gives you an excellent foundation to explore the full potential of JavaScript promises. With a few hours of practice of the course materials, I managed to see the scope of this programming paradigm, especially when it comes to expanding your skills for advanced tasks. I highly recommend this course for anyone who wants to take their knowledge of JavaScript to the next level.
  • Mauricio Araldi completed this course, spending 1 hours a week on it and found the course difficulty to be easy.

    The course is simple and direct, teaching exactly what it proposes. The teacher is clear and really helps in understanding the flow.
  • Dhawal Shah completed this course.

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