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The concept and role of DOM in JavaScript

Source: Internet
Author: User
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1 <!DOCTYPE HTML>2 <HTMLLang= "en">3 <Head>4     <MetaCharSet= "UTF-8">5     <title></title>6     <Script>7 8         /*9          *Ten * JavaScript is divided into three sections: One * ECMAScript Standard: The basic syntax of JS A * Dom:document Object Model---> Document object models----elements of the action page - * Bom:browser Object Model-----> Browser Object Models---operation is browser -          * the * DOM: Document Object Model -          * - * Document: Consider an HTML file as a document, because everything is the object, so the document as an object - * An XML file can also be viewed as a document +          * - * HTML: Display information, display the data + * XML: Focus on storing data A * HTML file as a document, then this document as an object, all the tags in the document can be regarded as an object at          * - * Each tab in the page is an element, and each element can be viewed as an object - * Tags can be nested, labels have tags, elements have elements -          * - * The HTML page has a root tag--html--also called the root element -          * in * The page has a root element (tag--html), there are many elements (there are many tags, there are many objects) -          * to * Document: A page is a document +          * - * element: All tags on the page are elements, and elements can be viewed as objects the          * * * Node: All the content on the page is a node: tags, properties, text $ * Root: RootPanax Notoginseng          * -          * the * page is document--document, there is a root element in the document: HTML + * HTML--->head A *------>body---> Other tags the          * + * A tree chart, called a tree (DOM tree), consisting of all the elements (tags) in the document and the document -          * $          * */ $  -     </Script> - </Head> the <Body> - Wuyi </Body> the </HTML>

The concept and role of DOM in JavaScript

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