how to fetch url data with nodejs file system code example

Example: fetch data from external url nodejs

const fetch   = require('node-fetch');
 
app.get('/', function (req, res) {
    var url = 'https://api.darksky.net/forecast/<API KEY>/37.8267,-122.4233';
     
    fetch(url)
    .then(res => res.json())
    .then(data => {
        res.send({ data });
    })
    .catch(err => {
        res.send(err);
    });
});