Welcome folks today in this blog post we will be fetching or extracting facebook user id from username in javascript. All the source code of the application is given below.

Get Started

In order to get started we need to install this library get-facebook-id by using the npm command a shown below

npm i get-facebook-id

Now after installing this library we need to create index.js file and copy paste the following code

index.js

const facebookIdOf = require('facebook-id-of');

// using callback
facebookIdOf('an_user', function (err, facebookId) {
  if (err) return console.error(err);
  console.log(facebookId);
});

// using promise
facebookIdOf('an_user')
  .then((facebookId) => {
    console.log(facebookId);
  })
  .catch((err) => {
    console.error(err);
  });

// using async/await
async function () {
  try {
      const facebookId = await facebookIdOf('an_user');
      console.log(facebookId);
  } catch (err) {
      console.error(err);
  }
}

Getting started

CLI usage

npm i -g facebook-id-of