How to use dom in js

Using the DOM in JavaScript allows you to do the following: Get elements (using document.querySelector() and document.querySelectorAll()). Modify elements (via properties and methods such as innerHTML, classList, and style). Add and remove elements (using appendChild() and removeChild()). Handle events (using addEventListener()). Traversing the DOM (using parentNode, childNodes and nextSibl

Using the DOM in JavaScript

DOM (Document Object Model) It is the main way for JavaScript to manipulate web content. It provides a representation of a tree structure, in which HTML elements are used as nodes, and these nodes can be accessed and modified through JavaScript.

##How to use DOM?

Get elements:
1. You can use the document.querySelector() and document.querySelectorAll() methods to get a single element or A set of elements.
Modify elements:
2. Elements can be modified through various properties and methods, such as innerHTML, classList and style.
Adding and removing elements:
3. You can add and remove elements using the appendChild() and removeChild() methods.
Handling events:
4. You can use the addEventListener() method to listen for events on elements, such as click or mouseover. ##Traverse the DOM:
You can use attributes such as
5. parentNode, childNodes and nextSibling to traverse the DOM tree #. ##Advantages of DOM

Provides dynamic access and modification to web content, supports various operations, including acquisition, Create, modify and delete elements.

Allows handling of user interactions such as clicks, mouseovers and keyboard input.

• Cross-browser compatible and works well in most major browsers.
• ##Example of DOM
• Here is a JavaScript code example illustrating how to use the DOM:

<code class="javascript">// 获取一个元素
const button = document.querySelector('button');

// 添加事件侦听器
button.addEventListener('click', () => {
  // 修改元素
  button.innerHTML = '已点击';
});</code>

In this example, we get A button element and then add a click event listener, we modify its

innerHTML property to update its content .

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