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Editorial Team
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Asked: 2026-05-27T17:09:51+00:00

See this comment from jquery-ui // Ignore z-index if position is set to a

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See this comment from jquery-ui

// Ignore z-index if position is set to a value where z-index is ignored by the browser
// This makes behavior of this function consistent across browsers
// WebKit always returns auto if the element is positioned

I see that jquery’s zIndex() returns 0 if the element is position: static.

Isn’t z-index supported on position:static? (It works for me in Chrome, haven’t tested cross-browser)

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  1. Editorial Team

    Because position: static means “Ignore all the positioning instructions from left, top, z-index, etc.”.

    'z-index'
Value:      auto | <integer> | inherit
Initial:    auto
Applies to:     positioned elements

    — http://www.w3.org/TR/CSS21/visuren.html#z-index

    An element is said to be positioned if its ‘position’ property has a value other than ‘static’.

    — http://www.w3.org/TR/CSS21/visuren.html#positioned-element

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