How to use document in js

Document is a global object in JavaScript used to interact with HTML documents. The main uses include: Obtaining and modifying DOM elements Listening for events and handling user interaction Accessing page metadata Storing and retrieving data Usage: The document object is a global variable and can be used directly. Attributes include documentElement, body, head, cookie, location, title. The main methods include getElementById, getElementsByTagName, createElement, addEventListener, removeEve

##Usage of document in JavaScript

document object Is a JavaScript global object provided by the browser, which represents the currently opened HTML document. It provides a set of methods and properties for interacting with the DOM (Document Object Model) to perform operations such as page manipulation, form validation, or handling user interaction.

Main purpose:

Get and modify DOM elements
• Listen to events and handle user interactions
• Access page elements Data (such as title, URL)
• Storage and retrieval of data (via cookie, localStorage)

Usage:

document object automatically Becomes a global variable for all browser windows. Therefore, you can use it directly like this:

<code class="javascript">document.getElementById("myElement").innerHTML = "Hello World!";</code>

Main attribute:

• documentElement: Points to the root element of the HTML document ( html).
• body: Points to the body element (body) of the HTML document.
• head: Points to the head element (head) of the HTML document.
• cookie: A string containing the cookie for the current page.
• location: Provides information about the current page URL and location.
• title: Get or set the title of the page.

Main method:

• getElementById(id): Get the element in the page based on its ID.
• getElementsByTagName(name): Get all matching elements in the page based on their names.
• createElement(element): Create a new element.
• addEventListener(event, listener): Listen to specific events on elements.
• removeEventListener(event, listener): Remove the event listener.
• querySelector(selector): Use CSS selector to get elements in the page.
• querySelectorAll(selector): Use a CSS selector to get all matching elements in the page.

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