[{"_1":2,"_42":-5,"_43":-5},"loaderData",{"_3":4,"_10":11,"_40":-5,"_41":-5},"root",{"_5":-5,"_6":-5,"_7":-5,"_8":9},"user","shoppingCartId","toast","locale","en","routes/_store+/_readers+/email_author.$slug/route",{"_12":13,"_39":-5},"book",{"_14":15,"_16":17,"_18":19,"_20":21,"_22":23,"_24":25},"id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvMzk3MTE","title","Understanding JavaScript Promises","state","published","contactAuthorMethod","email","aboutText","

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
How to abort asynchronous functions and create your own abortable functions
What happens to rejected promises without rejection handlers

Not ready to buy yet? Download a free preview first.

","authors",[26],{"_14":27,"_28":29,"_5":30},"Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6UHJvZHVjdEF1dGhvci80MTU0NQ","name","Nicholas C. Zakas",{"_31":32},"avatar",{"_33":34,"_35":36,"_37":38},"url","https://d308did4coypzi.cloudfront.net/avatars/50339/medium/me_%282%29.jpg?1647485739","styleName","medium","exists",true,"currentUser","routes/_store+/_layout","routes/_store+/_readers+/_layout","actionData","errors"]

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