Asynchronous Programming in JavaScript - Complete Course
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Asynchronous Programming in JavaScript - Complete Course
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What you'll learn
Learn about callbacks and how you have been using them in your daily programming
Explore how to handle errors in promises
Learn about making better promises with Async-Await
Skills you'll gain
Tools you'll learn
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There are 4 modules in this course
Updated in May 2025.
This course now features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. JavaScript wasn't initially designed for asynchronous operations, but with some adjustments, you can effectively manage asynchronous code to ensure data is used only after it's fully fetched. In this course, you'll master every aspect of asynchronous JavaScript through easy-to-understand examples and detailed explanations. You'll explore event loops, JavaScript's behind-the-scenes workings, asynchronous code execution, callbacks and their limitations, the advent of promises, and how Async Await beautifies promises. You'll apply these concepts in three real-world mini-projects, including handling multiple promises and errors using Async Await. By the end, you'll have a thorough understanding of asynchronous JavaScript. Designed for JavaScript developers, web developers, programmers, and front-end developers familiar with frameworks like Angular, React, Vue, or Svelte, this course will elevate your asynchronous programming skills and enhance your resume. Some knowledge of JavaScript will be an added advantage to get through the course.
In this module, we will establish a strong foundation for the course by introducing you to its objectives and key concepts. You will learn the differences between synchronous and asynchronous operations in JavaScript, delve into how multi-threading works, and gain insights into event loops, call stacks, and web APIs.
What's included
4 videos1 reading
4 videos•Total 40 minutes
- Introduction•3 minutes
- Introduction - Synchronous Versus Asynchronous Operations in JavaScript•19 minutes
- How does Asynchronous Code Execution Work - Multi-Threading in JavaScript•6 minutes
- Event Loops, Call Stacks, and Web APIs•12 minutes
1 reading•Total 10 minutes
- Full Course Assessment•10 minutes
In this module, we will dive into the intricacies of callback functions, exploring their role and applications in JavaScript. You will learn how to implement callbacks in various contexts, handle errors effectively, and navigate the complexities of callback hell. Additionally, you will gain hands-on experience through a mini-project that reinforces these concepts.
What's included
8 videos1 assignment
8 videos•Total 59 minutes
- What Are Callback Functions and What Do They Do?•9 minutes
- Callbacks in setTimeout and Event Listeners - Asynchronous Actions•14 minutes
- Callbacks Within Callbacks•5 minutes
- Handling Errors in Callbacks•8 minutes
- Callback Hell•8 minutes
- Synchronous Callback•4 minutes
- Mini-Project #1 - Question•4 minutes
- Mini-Project #1 - Solution•7 minutes
1 assignment•Total 15 minutes
- Callback Functions - Assessment•15 minutes
In this module, we will explore the powerful concept of promises in JavaScript, starting with their fundamental purpose and functionality. You will learn how to create and use promises to manage asynchronous code, handle promise results with .then(), .catch(), and .finally(), and construct promise chains for sequential operations. We will also dive into advanced error-handling techniques and the process of promisification. The module culminates in a mini-project that demonstrates the practical application of promises.
What's included
7 videos
7 videos•Total 78 minutes
- Promises - What Do They Do•10 minutes
- Creating and Using Promises in Your Asynchronous Code•15 minutes
- then(), .catch(), and .finally()•7 minutes
- Promise Chains•11 minutes
- Error Handling in Promises - In Detail•13 minutes
- Promisification•13 minutes
- Mini-Project #2•9 minutes
In this module, we will take a comprehensive look at async and await, key features that simplify working with promises in JavaScript. You will learn how to use async and await to resolve multiple promises, handle errors effectively, and streamline asynchronous code. The module concludes with a mini-project that allows you to apply these concepts to load a style script using async and await.
What's included
4 videos3 assignments
4 videos•Total 26 minutes
- Async Await - A Detailed Look•13 minutes
- Resolving Multiple Promises with Async Await•7 minutes
- Error Handling in Async Await•3 minutes
- Mini-Project #3•4 minutes
3 assignments•Total 90 minutes
- Async Await - Assessment•15 minutes
- Full Course Assessment•60 minutes
- Full Course practice Assessment•15 minutes
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Frequently asked questions
Yes, you can preview the first video and view the syllabus before you enroll. You must purchase the course to access content not included in the preview.
If you decide to enroll in the course before the session start date, you will have access to all of the lecture videos and readings for the course. You’ll be able to submit assignments once the session starts.
Once you enroll and your session begins, you will have access to all videos and other resources, including reading items and the course discussion forum. You’ll be able to view and submit practice assessments, and complete required graded assignments to earn a grade and a Course Certificate.
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