Class Ext.DomQuery

Package:	Ext
Class:	DomQuery
Extends:	Object
Defined In:	DomQuery.js

* Provides high performance selector/xpath processing by compiling queries into reusable functions. New pseudo classes and matchers can be plugged. It works on HTML and XML documents (if a content node is passed in).

This class is a singleton and cannot be created directly.

属性 - 方法 - 事件

公共属性

属性		定义对象
	matchers : Object	DomQuery
	Collection of matching regular expressions and code snippets.	DomQuery
	operators : Object	DomQuery
	Collection of operator comparison functions. The default operators are =, !=, ^=, $=, *= and %=. New operators can be...	DomQuery
	pseudos : Object	DomQuery
	Collection of "pseudo class" processors. Each processor is passed the current nodeset (array) and the argument (if an...	DomQuery

公共方法

方法		定义对象
	compile(`String selector`, [`String type`]) : Function	DomQuery
	Compiles a selector/xpath query into a reusable function. The returned function takes one parameter "root" （可选）...	DomQuery
	filter(`Array el`, `String selector`, `Boolean nonMatches`) : Array	DomQuery
	Filters an array of elements to only include matches of a simple selector (e.g. div.some-class or span:first-child)	DomQuery
	is(`String/HTMLElement/Array el`, `String selector`) : Boolean	DomQuery
	Returns true if the passed element(s) match the passed simple selector (e.g. div.some-class or span:first-child)	DomQuery
	select(`String selector`, [`Node root`]) : Array	DomQuery
	Selects a group of elements.	DomQuery
	selectNode(`String selector`, [`Node root`]) : Element	DomQuery
	Selects a single element.	DomQuery
	selectNumber(`String selector`, [`Node root`], `Number defaultValue`) : Number	DomQuery
	Selects the value of a node, parsing integers and floats.	DomQuery
	selectValue(`String selector`, [`Node root`], `String defaultValue`) : void	DomQuery
	Selects the value of a node, optionally replacing null with the defaultValue.	DomQuery

公共事件

此类没有公共事件。

属性详情

matchers

public Object matchers

Collection of matching regular expressions and code snippets.

This property is defined by DomQuery.

operators

public Object operators

Collection of operator comparison functions. The default operators are =, !=, ^=, $=, *= and %=. New operators can be added as long as the match the format c= where c is any character other than space, > <.

This property is defined by DomQuery.

pseudos
public Object pseudos
Collection of "pseudo class" processors. Each processor is passed the current nodeset (array) and the argument (if any) supplied in the selector.

This property is defined by DomQuery.

方法详情

compile

public function compile(String selector, [String type])

Compiles a selector/xpath query into a reusable function. The returned function takes one parameter "root" （可选）, which is the context node from where the query should start.

参数：

selector : String
The selector/xpath query
type : String
（可选） Either "select" (the default) or "simple" for a simple selector match

返回：

Function

This method is defined by DomQuery.

filter

public function filter(Array el, String selector, Boolean nonMatches)

Filters an array of elements to only include matches of a simple selector (e.g. div.some-class or span:first-child)

参数：

el : Array
An array of elements to filter
selector : String
The simple selector to test
nonMatches : Boolean
If true, it returns the elements that DON'T match the selector instead of the ones that match

返回：

Array

This method is defined by DomQuery.

is

public function is(String/HTMLElement/Array el, String selector)

Returns true if the passed element(s) match the passed simple selector (e.g. div.some-class or span:first-child)

参数：

el : String/HTMLElement/Array
An element id, element or array of elements
selector : String
The simple selector to test

返回：

Boolean

This method is defined by DomQuery.

select

public function select(String selector, [Node root])

Selects a group of elements.

参数：

selector : String
The selector/xpath query
root : Node
（可选） The start of the query (defaults to document).

返回：

Array

This method is defined by DomQuery.

selectNode

public function selectNode(String selector, [Node root])

Selects a single element.

参数：

selector : String
The selector/xpath query
root : Node
（可选） The start of the query (defaults to document).

返回：

Element

This method is defined by DomQuery.

selectNumber

public function selectNumber(String selector, [Node root], Number defaultValue)

Selects the value of a node, parsing integers and floats.

参数：

selector : String
The selector/xpath query
root : Node
（可选） The start of the query (defaults to document).
defaultValue : Number

返回：

Number

This method is defined by DomQuery.

selectValue

public function selectValue(String selector, [Node root], String defaultValue)

Selects the value of a node, optionally replacing null with the defaultValue.

参数：

selector : String
The selector/xpath query
root : Node
（可选） The start of the query (defaults to document).
defaultValue : String

返回：

void

This method is defined by DomQuery.