JavaScript promise resolve() Method

The Promise.resolve() method in JavaScript returns a Promise object that is resolved with a given value. If the value is a promise, it returns that promise; otherwise, it resolves the value as a new promise, making it useful for simplifying asynchronous code handling.

What is Promise resolve() method 

The promise.resolve() method in JS returns a Promise object that is resolved with a given value. Any of the three things can happen: 

• If the value is a promise then the promise is returned.
• If the value has a "then" attached to the promise, then the returned promise will follow that "then" to the final state.
• The promise fulfilled with its value will be returned.

Syntax: 

Promise.resolve(value);

Parameters:  Value(s) to be resolved by this Promise.

Return Value: Either the promise of the promise fulfilled with its value is returned.

Example 1:  In this example, we creates a resolved promise with the value 17468. The .then() method handles the resolved value, logging 17468 to the console as the output.

let promise = Promise.resolve(17468);

promise.then(function (val) {
	console.log(val);
});
//Output: 17468

17468

Example 2: Following is the code snippet that shows the other version of the above-illustrated approach-

Promise.resolve(17468).then((value) => console.log(value));

17468

Example 3: In this example, we will be using a timer function called setTimeout() will be responsible for the execution of the values which are passed inside resolve() which is passed inside that timer function.

const promise = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve([89, 45, 323]);
    }, 5000);
});

promise.then(values => {
    console.log(values[1]);
});

Output: 

45 

Example 4: In this example, we will be resolving the first promise inside another newly created promise in which we have defined one timer function (setTimeout).

const promise = Promise.resolve(3126);

const promise1 = new Promise((resolve, reject) => {
    setTimeout(() => {
        promise.then(val => console.log(val));
    }, 5000);
});

promise1.then(vals => {
    console.log(vals);
});

Output: 

3126 

We have a complete list of Javascript Promise methods, to check those please go through the Javascript Promise Complete Reference article.

Supported Browsers: 

• Google Chrome
• Edge 
• Firefox
• Opera
• Safari

JavaScript is best known for web page development but it is also used in a variety of non-browser environments. You can learn JavaScript from the ground up by following this JavaScript Tutorial and JavaScript Examples.