CSS negation pseudo-class :not() for parent/ancestor elements
This is driving me nuts:
HTML:
Hello World!
CSS:
-
Doesn't this read, "Select all
h1elements that have an ancestor that is not adivelement...?"It does. But in a typical HTML document, every
h1has at least two ancestors that are notdivelements — and those ancestors are none other thanbodyandhtml.This is the problem with trying to filter ancestors using
:not(): it just doesn't work reliably, especially when the:not()is not being qualified by some other selector such as a type selector or a class selector, e.g..foo:not(div). You'll have a much easier time simply applying styles to allh1elements and overriding them withdiv h1.In Selectors 4,
:not()has been enhanced to accept full complex selectors containing combinators, including the descendant combinator. Whether this will be implemented in the fast profile (and thus CSS) remains to be tested and confirmed, but once it is implemented, then you will be able to use it to exclude elements with certain ancestors. Due to how selectors work, the negation has to be done on the element itself and not the ancestor in order to work reliably, and therefore the syntax will look a little different:h1:not(div h1) { color: #900; }Anyone who's familiar with jQuery will quickly point out that this selector works in jQuery today. This is one of a number of disparities between Selector 3's :not() and jQuery's :not(), which Selectors 4 seeks to rectify.
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The
<html>element is not a<div>. The<body>element is not a<div>.So the condition "has an ancestor that is not a
<div>" will be true for all elements.Unless you can use the
>(child) selector, I don't think you can do what you're trying to do - it doesn't really make sense. In your second example,<article>is not a div, so that matches*:not(div)too.讨论(0)
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