lock-title.js

"use strict";

// lockTitle() returns a function that is allowed to change the title after it is locked
// This only works in browsers that support the DOMTitleChanged event (only Firefox)

var lockTitle = function () {
	lockTitle = undefined;
	var titleChanging = false,
	title = document.title;
	document.addEventListener("DOMTitleChanged", function () {
		if (titleChanging) {
			title = document.title;
			titleChanging = false;
			return;
		}
		document.title = title;
	}, false);
	var changeTitle = function (title) {
		titleChanging = true;
		document.title = title;
	};
	return changeTitle;
};