Revealing the mystery behind this - https://readosapien.com/revealing-the-mystery-behind-this

bind4.js

let song = {
    songName: 'Blank Space',
    getSong: function() {
        console.log(this.songName);
    }
};
let song1 = song.getSong.bind(song); // Blank Space
setTimeout(song1, 1000);