How to use the parseDOM function from htmlparser2

htmlparser2.parseDOM is a JavaScript function in the htmlparser2 library that parses an HTML string into a DOM tree, represented by a set of nodes and attributes that can be manipulated using the DOM API.

How does htmlparser2.parseDOM work?

htmlparser2.parseDOM works by taking an HTML string as its input and parsing it into a DOM tree, represented by a set of nodes and attributes that can be manipulated using the DOM API. When called, htmlparser2.parseDOM first creates a new htmlparser2.Parser object, which is responsible for parsing the HTML string into a set of nodes and attributes. The Parser object then reads and parses the HTML string character by character, building a tree of nodes representing the elements, text, and comments in the HTML. Each node is represented by a JavaScript object with properties that correspond to its type, such as nodeName, nodeValue, attributes, and childNodes. Once the parsing is complete, htmlparser2.parseDOM returns the root node of the resulting DOM tree, which can be manipulated using the DOM API to add, remove, or modify elements and attributes. Note that htmlparser2.parseDOM is part of the htmlparser2 library, which provides a fast and flexible parser for HTML and XML documents in JavaScript, and supports various parsing options and customizations.

Ai Example

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const htmlparser2 = require("htmlparser2");

const html = `

Example Page

Hello, world!
This is an example page.

`;

const dom = htmlparser2.parseDOM(html);

console.log(dom);

In this example, we first import the htmlparser2 library and define an HTML string representing a simple web page with a title, a header, and a paragraph. We then use htmlparser2.parseDOM to parse the HTML string and generate a DOM tree of nodes, represented by a nested set of JavaScript objects with properties such as nodeName, nodeValue, and attributes. We then use console.log to print the resulting DOM tree to the console. The output will be a nested set of objects representing the HTML elements and attributes, such as html, head, title, body, h1, and p, as well as text and comment nodes. The resulting DOM tree can be manipulated using the DOM API to modify the contents or structure of the web page. Note that this is just a simple example, and htmlparser2.parseDOM can be used to parse more complex HTML documents with various options and customizations, such as ignoring or preserving certain elements or attributes, or applying custom parsing rules.