JAVASCRIPT

change page title js

document.title="New Title";

javascript title string

function toTitles(s){ return s.replace(/wS*/g, function(t) { return t.charAt(0).toUpperCase() + t.substr(1).toLowerCase(); }); }
var str = toTitles('abraham lincoln'); // Abraham Lincoln

javascript change title

// Changing the website's <title>
document.title = "Test";

DOM how to change title

const docTitle1 = document.querySelector('title');
docTitle1.textContent = 'Document title here';