Is there an upper limit to z-index values in web browsers?

browser z-index
Andrew Hedges picture Andrew Hedges · Oct 23, 2008 · Viewed 20k times · Source

I have a case where a 3rd party ad is bleeding through my modal window implementation. I'd like to up the z-index of the modal overlay as high as possible so the ad won't show on top of it. Is there a limit to z-index values? I'm sure if there is it varies by browser. Anyone know?

Answer

user42507 picture user42507 · Mar 6, 2009

Maximal zIndex value supported by most browsers is 2147483647 (2^31-1), but Opera 9.2 doesn't accept values larger than 2147483583; They fixed it in version 9.5.

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