rainforestTest.js

const https = require('https');

const follow = function (url) {
    url = url.indexOf('?')!== -1 ? url.replace(/\?/,'.json?') : url+'.json';
    https.get(url, function (res) {
        let raw = "";
        res.on('data', function (data) {
            raw += data;
        });
        res.on('end', function () {
            const obj = JSON.parse(raw);
            console.log(obj);
            if(obj.follow) {
                follow(obj.follow);
            }
        });
    });
};

follow("https://letsrevolutionizetesting.com/challenge");