What is the use of document in js

The document object is the representation of the HTML document in JavaScript and is used to: Get HTML elements Create HTML elements Modify HTML elements Listen to events Operation styles Get document information Access the DOM tree

The role of document in JavaScript

The document object plays a vital role in JavaScript, which represents the current HTML document. Through the document object, developers can access and modify the content, structure, and style of an HTML document.

Uses of document

The document object has a wide range of uses, including:

• Get HTML elements: Use methods such as document.getElementById(), document.getElementsByClassName(), and document.querySelectorAll() to get HTML elements.
• Create HTML elements: Use document.createElement() and document.createElementNS() methods to create new HTML elements.
• Modify HTML elements: Modify HTML elements by modifying their attributes, styles, and text content.
• Listening to events: Use the document.addEventListener() method to listen for events on HTML elements.
• Manipulating styles: Access and modify CSS style sheets by accessing the document.styleSheets property.
• Get document information: Use properties such as document.title, document.location and document.URL to obtain the title, URL and location information of the document.
• Accessing the DOM tree: The document object is the root node of the DOM tree, and developers can traverse the DOM tree to access all elements and nodes in the document.

Summary

The document object is a powerful tool in JavaScript that allows developers to interact with HTML documents and easily manipulate their content, Structure and style.

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