How to pass parameters to a Promise function with JavaScript?

Estimated read time 1 min read

To pass parameters to a Promise function in JavaScript, you can define the function to take parameters as arguments, and use those arguments in the Promise body.

Here’s an example of a Promise function that takes two parameters x and y:

function add(x, y) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      if (typeof x !== 'number' || typeof y !== 'number') {
        return reject(new Error('Both arguments should be numbers'));
      resolve(x + y);
    }, 1000);

add(2, 3)
  .then(sum => {
    console.log(sum); // 5
  .catch(error => {

In this example, the add function takes two parameters x and y. It returns a Promise that resolves with the sum of x and y after a one-second delay, or rejects with an error if either x or y is not a number. To use the add function, we call it with two arguments, and use the then method to handle the resolved value, or the catch method to handle the rejected error.

You May Also Like

More From Author

+ There are no comments

Add yours

Leave a Reply