Summary
Contact:HTML and XML are shared. Core API(DOM ). Therefore, the nodes and node lists in the html dom and xml dom refer to the same object. Reference: http://www.w3school.com.cn/htmldom/dom_intro.asp Differences:For convenience, the features and methods of html dom are not just standard DOM implementation, but specific to HTML and also make some DOM operations easier. HTML DOMYes Element-Based implementation)Instead of Node-Based. For example, in the xml dom, the attribute of an element node is an attribute node with the current element node as the parent node (the element node and attribute node can use the nodeType attribute value of the node to distinguish between them, the value of nodeType of element nodes is 1, and the value of nodeType of attribute nodes is 2 ). In html dom, The attribute of an element node is an attribute and is not viewed as a separate node.. For example, get an attribute (such as id) value of an element node in xml dom: x = myelement. in getAttribute (id) html dom: x = myelement. id: 1. DOM node Search Method GetElementsByTagName_r (), GetElementByID ()The former can be used for html dom or xml dom, while the latter can only be used for html dom. Note: For details, the element in the getElementsByTagName_r () method is a complex number, while the element in the getElementByID () method is a singular number. This is because multiple nodes with the same nodeName can exist, and one id (node attribute in HTML) can only correspond to one element node. 2.There are two special node attributes Access the root node of the document:The former can be used for html dom or xml dom, while the latter can only be used for html dom.
The latter is a special extension of the HTML page and provides direct access to the <body> tag. **************************************** ****************************************, Discuss the source of this issue. Change HTML content: 1. document. write ()The parameters in the brackets are the strings to be written. Based on my experiment results, my experience is as follows: It can only be used inside <body> and the Code must be included in <script type = "text/javascript">... </script>. And The written content does not affect the rest of the HTMLFor example, This is equivalent to adding a sentence directly to the js Code position on the page.. 2. innerHTML attributes. Almost all html dom elements have this attribute. It is actually a string used Sets or obtains the HTML between the start and end tags of an object.. Usually in the javascript code of Used in combination with the getElementById () method. Use the getElementById () method to obtain the target node, and then use the innerHTML attribute to obtain or set the content between the start and end labels of the node. Example: document. getElementByIdx_x_x ('a1 '). innerHTML = xmlhttp. status, where A1 is the id of a tag in HTML. This statement sets the content of the tag to the status of reading the XML file. **************************************** **************************************** * ****************** Differences of DOM in different browsers. All modern browsers support W3C DOM specifications, but there are differences between them, mainly manifested in the following two points:Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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