Browser tab change notification like when you get a new gmail e-mail or a new tweet in Twitter

In Chrome and Firefox, whenever I get a new email the inactive tab displays a very subtle notification. Basically, it just shines a little. In Chrome is shines from left to right as if someone is shining a flashlight on the tab.

It also does this when your are on the Twitter homepage, and a new tweet shows up.

I'm sure it is some Javascript function, but I can't seem to find it, because I don't think I am 开发者_C百科asking the question right.

Does anyone know how to do this?

---

I posted an answer to a similar question (thanks @Jacob) a while back (about Firefox, not Chrome). The answer works in Chrome as well.

Do you mean that you're building a website and you want to let Firefox notify the user on an event when the tab is pinned?

I'm fairly certain Firefox does it when the website's <title> is changed. For instance on Twitter, when there's a new tweet, the title is changed from "Twitter / Home" to "(1) Twitter / Home". Firefox notices this and notifies the user.

So really, any javascript function that changes <title> will make it work.

I hope that helps

Just noticed the post was linked in a comment, so thanks @planetjones too!