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.



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JS promises

promises

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.

JavaScript Promises

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# Summary
That brings us to the end of our journey in understanding promises in JavaScript. We have covered quite a bit in this module. We started off by introducing ourselves to basic JavaScipt promises. We then learned how to fulfill or reject these promises. 

Then, we learned how several tasks can be performed together if we chain these promises. We learned several similar techniques for handling multiple promises before moving on to async and `await` expressions that helped us execute multiple promises simultaneously. Finally, we learned how Node.js detects and tracks unhandled rejections.

Here's a quick summary of what we have learned in this course.

Introduction

Basics of Promises

Chaining Promises

Working with Multiple Promises

Async Functions and Await Expressions

Tracking Down the Unhandled Rejections

Conclusion

Final Remarks