Misc,

Selectors API

, and .
World Wide Web Consortium, Working Draft WD-selectors-api-20081114, (November 2008)

Abstract

Selectors, which are widely used in CSS, are patterns that match against elements in a tree structure. The Selectors API specification defines methods for retrieving Element nodes from the DOM by matching against a group of selectors. It is often desirable to perform DOM operations on a specific set of elements in a document. These methods simplify the process of acquiring specific elements, especially compared with the more verbose techniques defined and used in the past.

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