What is the highest possible z-index value that can be applied in

Is there a specific limit to the CSS property z-index? Are there variations in accepted values among different browsers? How do browsers typically handle extreme z-index values?

I recall reading about a potential maximum value for z-index somewhere, but I could be mistaken. Thank you for your help!

Answer №1

These numbers represent the maximum values.

Browser         Max z-index value  Exceeding this value results in:
Internet Explorer 6 2147483647  2147483647
Internet Explorer 7 2147483647  2147483647
Internet Explorer 8 2147483647  2147483647
Firefox 2           2147483647  *element disappears*
Firefox 3           2147483647  0
Safari 3            16777271    16777271
Safari 4            2147483647  2147483647
Chrome 29           2147483647  2147483647
Opera 9             2147483647  2147483647

Came across this information while browsing the internet.

Answer №2

Surprisingly, the maximum z-index value in chrome is reached.

.css('z-index', '99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999').css('z-index')

Adding just one more digit would result in 1e+308

Answer №3

Uncovered some updated details from 2012:

"According to reports, Chrome, Opera, and IE9 are the only web browsers that support a true infinite value for the z-index property. Meanwhile, Firefox continues to use 2147483647 as its maximum value, and Safari has been noted to exhibit strange rounding behavior after a number exceeds 16 digits in length."

Check out the original article here: World War Z-index

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