Properties and methods of DOM and XMLHttpRequest objects, domxmlhttprequest_PHP tutorial

Attributes and methods of DOM and XMLHttpRequest objects, domxmlhttprequest

Standard XMLHttpRequest operations

方法	描述
abort()	停止当前请求
getAllResponseHeaders()	把HTTP请求的所有响应的首部作为建/值返回
getResponseHeader(“header”)	返回指定首部的串值
open(String  “method”, String  ”url， bollean  [asynch], String  [username], String  [password])	建立的服务器的调用，method参数可以是post、get或put。url参数可以是相对url或绝对url。这个方法还包括3个可选参数。
send(content)	像服务器发送请求
setRequestHeader(“header”,”value”)	把指定首部设置为所提供的值。在设置任何首部之前必须现调用open().

Method

Description

方法	描述
onreadystatechange	每个状态改变时都会出发这个事件处理器，一般为调用一个javascript函数。
readystate	请求的状态。有5个可取值： 1=未初始化， 2=正在加载， 3=已加载， 4=交互中， 5=完成。
responseText	服务器的响应，表示为一个串。
responseXML	服务器的响应，表示为XML,这个对象一般解析为DOM.
status	服务器HTTP状态码（200对应OK，404对应not found(未找到)，等等）
statusText	HTTP状态码的相应文本（OK或not found(未找到)  等等）

abort()

Stop current request

getAllResponseHeaders()

Return the headers of all responses to HTTP requests as build/values

属性名	描述
childNodes	返回当前元素的所有子元素的数组
firstChild	返回当前元素的第一个下级子元素
lastChild	返回当前元素的最后一个子元素
nextSibling	返回紧跟在当前元素后面的元素
Nodevalue	指示表示元素值的读/写属性
parentNode	返回元素的父节点
previousSibling	返回紧邻当前元素之前的元素

getResponseHeader(“header”)

Returns the string value of the specified header

open(String “method”, String “url, bollean [asynch], String [username], String [password])

When calling the established server, the method parameter can be post, get or put. The url parameter can be a relative url or an absolute url. This method also includes 3 optional parameters.

send(content)

Send a request to the server

setRequestHeader("header","value")

Sets the specified header to the provided value. open(). must be called before setting any headers

Standard XMLHttpRequest attributes

Method	Description
onreadystatechange	This event handler will be triggered every time the state changes, usually calling a javascript function.
readystate	The status of the request. There are 5 possible values: 1=not initialized, 2=Loading, 3=Loaded, 4=Interacting, 5=Done.
responseText	The server's response, expressed as a string.
responseXML	The server's response is expressed as XML. This object is generally parsed into DOM.
status	Server HTTP status code (200 corresponds to OK, 404 corresponds to not found (not found), etc.)
statusText	The corresponding text of the HTTP status code (OK or not found (not found), etc.)

DOM element attributes for processing XML

Attribute name	Description
childNodes	Returns an array of all child elements of the current element
firstChild	Returns the first subordinate child element of the current element
lastChild	Returns the last child element of the current element
nextSibling	Returns the element immediately following the current element
Nodevalue	Indicates the read/write attribute representing the element value
parentNode	Returns the parent node of the element
previousSibling	Returns the element immediately before the current element

DOM element methods for traversing XML

Method name

方法名	描述
GetElementById(id)  （document）	获取有指定唯一ID属性值文档中的元素
getElementsByTagName(name)	返回当前元素中有指定标记名的子元素的数组
hasChildNodes()	返回一个布尔值，指示元素是否有子元素
getAttribute(name)	返回元素的属性，属性由name指定

Description

GetElementById(id) (document)

Get the element in the document with the specified unique ID attribute value

属性/方法	描述
Docment.createElement(tagName)	文档对象上的createElement方法可以创建有tagname指定的元素。如果以串DIV为参数，就会生成一个DIV元素。
Docment.createTextNode (text)	文档对象上的createTextNode方法会创建一个包含静态文本的节点。
.appendChild(childNode)	appendChild将指定的节点增加到当前节点的子节点列表（作为一个新的子节点）。例如：可以增加一个option元素，做为select元素的子节点。
.getAttribute(name)	这些方法分别设置元素中name属性的值
.getAttribute(name,value)
.insertBefore(newNode,targetNode)	这个方法将节点newNode作为当前元素的子节点插入到targetNode元素的前面
.removeAttribute(name)	这个方法从元素中删除属性name
.removeChild(childNode)	这个方法从元素中删除子元素childNode
.replaceChild(newNode,oldNode)	这个方法将节点newNode替换为oldNode
.hasChildnodes()	这个方法返回一个布尔值，指示元素是否有子元素

getElementsByTagName(name)

Returns an array of child elements with the specified tag name in the current element

hasChildNodes()

Returns a Boolean value indicating whether the element has child elements

getAttribute(name)

Returns the attribute of the element, the attribute is specified by name

W3C DOM properties and methods used when creating content dynamically

Properties/Methods	Description
Docment.createElement(tagName)	The createElement method on the document object can create an element specified by tagname. If the string DIV is used as a parameter, a DIV element will be generated.
Docment.createTextNode (text)	The createTextNode method on the document object creates a node containing static text.
.appendChild(childNode)	appendChild adds the specified node to the current node's child node list (as a new child node). For example: you can add an option element as a child node of the select element.
.getAttribute(name)	These methods set the value of the name attribute in the element
.getAttribute(name,value)
.insertBefore(newNode,targetNode)	This method inserts the node newNode as a child node of the current element in front of the targetNode element
.removeAttribute(name)	This method removes the attribute name from the element
.removeChild(childNode)	This method removes the child element childNode from the element
.replaceChild(newNode,oldNode)	This method replaces the node newNode with oldNode
.hasChildnodes()	This method returns a Boolean value indicating whether the element has child elements ​

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