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The meaning of DOM:

DOM, called File object Model (DocumentObjectModel, DOM), is a standard programming interface recommended by W3C to deal with extensible markup language.

DOM is the in-memory object representation of HTML documents, which provides a way to interact with web pages using JavaScript. DOM is the hierarchy (or tree) of nodes, where the document node is the root.

In fact, DOM is a document model described in an object-oriented way. DOM defines the objects needed to represent and modify the document and their behaviors and properties, as well as the relationships between these objects.

With JavaScript, we can ReFactor the entire HTML document. Such as adding, removing, changing, or rearranging items on a page.

To change something on the page, JavaScript needs to get access to all elements in the HTML document. This entry, along with the addition and removal of HTML elements

The methods and properties that are moved, changed, or removed are all obtained through the document object model (DOM)

Example:

The easiest way to get the content of an element in JavaScript is through the innerHTML attribute, so in the following case we can get the text content of the element through innerHTML

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Document

Hello World!

Var demo=document.getElementById ("demo") [xss_clean]

[xss_clean] (demo)

Effect picture:

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