cssQuery()的下载与使用方法

2024-09-06 12:43:49

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Introduction
cssQuery() is a powerful cross-browser JavaScript function that enables querying of a DOM document using CSS selectors. All CSS1 and CSS2 selectors are allowed plus quite a few CSS3 selectors.

Usage
Syntax
elements = cssQuery(selector [, from]);where selector (required) is a valid CSS selector and from (optional) is a document, element or array of elements which is filtered by selector.

The function returns a JavaScript array of elements. If there is no match, an empty array is returned.

Some examples:

// find all paragraphs that are direct descendants// of the document bodyvar tags = cssQuery("body > p");// find all elements with the "href" attributevar tags = cssQuery("[href]");// find all anchor elements with "href" equal to "#"var tags = cssQuery("a[href='#']");// find all images contained by the above anchorsvar images = cssQuery("img", tags);// find all listsvar tags = cssQuery("dl,ol,ul");// query an external xml documentvar tags = cssQuery("my|:root>my|link", myXMLDoc);// just plain complicatedvar complex = "p>a:first-child+input[type=text]~span";var tags = cssQuery(complex);Allowed Selectors
*
E
E F
E > F
E + F
E ~ F
E.warning
E#myid
E:link
E:first-child
E:last-child
E:nth-child(n)
E:nth-last-child(n)
E:only-child
E:root
E:lang(fr)
E:target
E:enabled
E:disabled
E:checked
E:contains("foo")
E:not(s)
E[foo]
E[foo="bar"]
E[foo~="bar"]
E[foo^="bar"]
E[foo$="bar"]
E[foo*="bar"]
E[foo|="bar"]
Compatibility
Known to work on the following platforms:

Microsoft Internet Explorer 5+ (Windows)
Microsoft Internet Explorer 5.2 (Mac)
Firefox/Mozilla 1.6+
Opera 7+
Netscape 6+
Safari 1.2