JavaScript Promise Explained β‘οΈ
A π§΅π
A π§΅π
Promises are used to handle asynchronous operations in JavaScript.
They are easy to manage when dealing with multiple asynchronous operations where callbacks can create callback hell leading to unmanageable code.
They are easy to manage when dealing with multiple asynchronous operations where callbacks can create callback hell leading to unmanageable code.
The most common use case of Promise is fetching data from a REST API
The fetch API from JavaScript returns a Promise because the HTTP request can take a lot of time and then we can call functions depending on whether the request succeeds or failed
The fetch API from JavaScript returns a Promise because the HTTP request can take a lot of time and then we can call functions depending on whether the request succeeds or failed
A Promise is in one of these states:
βοΈ pending: initial state, neither fulfilled nor rejected.
βοΈ fulfilled: meaning that the operation was completed successfully.
βοΈ rejected: meaning that the operation failed.
Promise Syntax:
βοΈ pending: initial state, neither fulfilled nor rejected.
βοΈ fulfilled: meaning that the operation was completed successfully.
βοΈ rejected: meaning that the operation failed.
Promise Syntax:
Benefits of Promises -
βοΈImproves Code Readability
βοΈ Better handling of asynchronous operations
βοΈBetter flow of control definition in asynchronous logic
βοΈ Better Error Handling
βοΈImproves Code Readability
βοΈ Better handling of asynchronous operations
βοΈBetter flow of control definition in asynchronous logic
βοΈ Better Error Handling
That's it Guys
Thank you for reading this π
If you liked this thread, make sure to:
Follow me
@ighmaz_js
and retweet this!
Thank you for reading this π
If you liked this thread, make sure to:
Follow me
@ighmaz_js
and retweet this!
Loading suggestions...