:-moz-first-node - CSS: Cascading Style Sheets 编辑

Non-standard

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The :-moz-first-node CSS pseudo-class is a Mozilla extension that represents any element that is the first child node of some other element. It differs from :first-child because it does not match a first-child element with (non-whitespace) text before it.

Note: Any whitespace at the start of an element is ignored for the determination of :-moz-first-node.

Syntax

:-moz-first-node

Examples

CSS

span:-moz-first-node {
  background-color: lime;
}

HTML

<p>
  <span>This matches!</span>
  <span>This doesn't match.</span>
</p>

<p>
  Blahblah.
  <span>This doesn't match because it's preceded by text.</span>
</p>

Result

Specifications

Not part of any standard.

See also

• :-moz-last-node
• :first-child