Master The Promises in JavaScript in Hindi in 2022
Channel: Thapa Technical
Date: 2020-04-24

Welcome, what are Promises in javascript in Hindi? Why JavaScript Promises are the most important topic to master javascript? What is Promise javascript Resolve Reject function? How and When to use Promises in Javascript in Hindi? So Promises are used to handle asynchronous operations in JavaScript.
A Promise has Three states:
fulfilled: Action related to the promise succeeded.
rejected: Action related to the promise failed.
pending: Promise is still pending i.e not fulfilled or rejected yet.

Promises can be consumed by registering functions using .then and .catch methods.

then()
then() is invoked when a promise is either resolved or rejected.

catch()
catch() is invoked when a promise is either rejected or some error has occurred in execution


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