Check browser tabs by JavaScript?

Question

Can I check if host page for a JavaScript is active by the browser's tab in IE7/FF/Opera?

Checking other tabs than the page where this JS runs would probably be a security risk though..

My other option is a method I remember by prototype to check if the mouse cursor is active, but it's not that accurate.

mainly wait as the guy who answered provided an answer to a different question. in this case, an accept was granted for saying what was said in the question. someone else can prove that wrong later, as happened in this case. — geowa4
– geowa4, Commented Feb 4, 2009 at 19:05

geowa4 · Accepted Answer · 2009-02-04 16:34:19Z

7

You can attach the onBlur and onFocus events to the window; that will tell you if you have focus or not. I have tested this and it works. You cannot check another page, but you can definitely check your own.

edited Feb 4, 2009 at 16:34

answered Feb 4, 2009 at 16:28

geowa4

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7 Comments

Georg Schölly Over a year ago

Maybe I misunderstood his question, but wasn't it about checking other tabs than the one the javascript is running in?

Nosredna Over a year ago

I think you misunderstood the question. There's only one question mark there and it seems to be about the current tab.

geowa4 Over a year ago

I think this requires a little creativity, as it is poorly worded. I think he wants how to check if his page's tab is the active one.

geowa4 Over a year ago

Why would he care if another page the user has up is running jQuery (or some other js)?

olemarius Over a year ago

I'd like to execute AJAX calls only if the user is actually looking at the window, so this would be a solution :-)

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