Understanding JavaScript Promises

Since promises were added to JavaScript in 2015, they have become an integral part of the language. A good understanding of how promises work is more important than ever in becoming a proficient JavaScript developer. This book is written to introduce the promises and their intricacies in a straightforward, easy to read format. Each chapter is filled with practical, real-world examples using the techniques discussed, and all examples are available for download with your purchase.

What you'll learn:

• Which parts of promises are synchronous and which are asynchronous
• How to effectively use promise chains to simplify your code
• The best way to catch errors in promises
• How to create your own promises
• Ways to work with multiple promises at once
• How async functions and await expression hide promise complexities
• What happens to rejected promises without rejection handlers