How can I update a tab's title when new content appears on minimized page?

Question

When you have multiple tabs open some websites will update the tab title (ie with a "(1)" or "(2)") to indicate that content on the page has changed. I believe sites like Facebook and Buzzfeed do this (or am I just dreaming that they do that?)... How do they do it? Do they use JS? Is it possible to do something like that on a Wordpress site with a plugin that anyone is aware of?

Answer 1

Just use:

document.title = "Whatever";

Reference:

• https://developer.mozilla.org/en-US/docs/DOM/document.title