Promises in JavaScript

Promises in JavaScript

In this tutorial, learn how Creating, Consuming, Chaining, and Polyfill for Promises in Javascript. When we define a promise in JavaScript, it will be resolved when the time comes, or it will get rejected.

A promise in JavaScript is similar to a promise in real life. When we make a promise in real life, it is a guarantee that we are going to do something in the future. Because promises can only be made for the future. A promise has two possible outcomes: it will either be kept when the time comes, or it won’t. This is also the same for promises in JavaScript. When we define a promise in JavaScript, it will be resolved when the time comes, or it will get rejected.

Promises are one of the ways we can deal with asynchronous operations in JavaScript. The promise is commonly defined as a proxy for a value that will eventually become available. The Promise is a way of defining a function in such a way that we can synchronously control its flow.

Producing code” is code that can take some time. “Consuming code” is a code that must wait for the result. A Promise is a JavaScript object that links producing code and consuming code. JavaScript Promise object contains both the producing code and calls to the consuming code.

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