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JavaScript Promises

Name: JavaScript Promises
Price: 59 USD
Rating: 4.9 (20 reviews)
Author: Nicholas Zakas

Gain insights into JavaScript Promises to handle asynchronous events, chain multiple promises, utilize built-in methods, and master async functions with await expressions for efficient event handling.

4.9

40 lessons

12h

Created by Nicholas Zakas

What's included

40 lessons across 7 modules
5 quizzes with instant feedback
AI Tutor on every lesson

Join 3.1 million developers at

What You'll Learn

An in-depth understanding of JavaScript promises
An understanding of the asynchronous programming in JavaScript
Hands-on experience creating settled and unsettled promises
A working knowledge of chaining promises
Familiarity with monitoring and responding to promises executing in parallel
The ability to track unhandled rejections

Learning Roadmap

40 Lessons5 Quizzes

Introduction

Get familiar with JavaScript promises, enhancing asynchronous programming and improving code clarity.

What’s This Course About?

Introduction to JavaScript Promises

Basics of Promises

Unpack the core of JavaScript promises, their states, handlers, and construction methods.

Fundamentals of Promises

Handlers

Handlers Executed as Microtasks

Unsettled Promises

Settled Promises

Non-Promise Thenables

Summary: Basics of Promises

Quiz: Basics of Promises

Chaining Promises

7 Lessons

Examine JavaScript promise chaining to handle sequential async operations and centralized error management.

Working with Multiple Promises

10 Lessons

Grasp the fundamentals of managing multiple promises using Promise.all(), allSettled(), any(), and race().

Async Functions and Await Expressions

7 Lessons

Take a closer look at async functions, await expressions, and promise handling in JavaScript.

Tracking Down the Unhandled Rejections

5 Lessons

Focus on tracking and managing unhandled promise rejections across JavaScript environments.

Conclusion

Build on key concepts of JavaScript promises, async/await, and error handling.

Final Remarks

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

About this course

WHY I WROTE THIS COURSE

Promises are used to deal with event handling and callbacks in asynchronous programming in JavaScript, such as clicks and key presses. Promises allow developers to specify a function to execute at some later point in response to certain events. Promises may also indicate whether a certain code succeeded or failed in performing its assigned job. In this course, you will learn how to chain different promises, which makes the code easier to understand and debug. Next, you’ll learn built-in methods to monitor and respond to multiple promises executing in parallel. Then, you will cover async functions and await expressions that are often used with promises. Finally, you’ll learn how to track promises when they are rejected without a rejection handler. Promises are important to understand and debug the code in asynchronous programming. The concepts of JS promises help developers working with Node.js and Deno for event handling and with asynchronous JavaScript APIs.

ABOUT THE AUTHOR

Nicholas Zakas

Hi, I’m Nicholas Zakas. I’m an independent software developer, author, and coach living in Peabody, Massachusetts. I’ve been an architect at Box and Yahoo, created the ESLint open source project, and wrote several books about JavaScript.

Learn more about Nicholas

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