How to use jQuery to modify attributes of HTML elements

jQuery is a popular JavaScript library used to dynamically change the style and content of HTML elements on web pages. In this article, we will introduce how to use jQuery to modify the attributes of HTML elements.

Step One: Introduce the jQuery library

Before using jQuery, its library file must be added to the web page. You can download the jQuery library files directly and add them to your project folder, or you can use a CDN (Content Delivery Network) to reference jQuery. The following is the code snippet that introduces jQuery:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

Step 2: Select elements and modify attributes

Once the jQuery library file is introduced, you can use the jQuery selector to select HTML elements and modify them Attributes.

Modify the CSS properties of an element

Change one or more CSS properties by using the css() method. For example, the following code will change the background color of the element with id "myDiv" to red:

$('#myDiv').css('background-color', 'red');

Modify the text content of the element

By using the text() method , can change the text content of HTML elements. For example, the following code will change the text content of the p element:

$('p').text('这是新文本内容！');

Modify the HTML content of the element

You can change the HTML of an HTML element by using the html() method content. For example, the following code will change the HTML content of the element with the id "myDiv":

$('#myDiv').html('<h1>这是新的HTML内容</h1>');

Modify the attributes of the element

By using the attr() method, you can change Attributes of HTML elements. For example, the following code will change the src attribute of the img element:

$('img').attr('src', 'newImage.jpg');

Step 3: Test the code

After completing the code, you can check by opening the browser and viewing the corresponding element on the web page Whether the modification was successful. During development, you can check whether an element's properties have changed through your browser's developer tools.

Conclusion

jQuery makes it easy and intuitive to modify the properties of HTML elements. jQuery makes it easy to select HTML elements and change their style, content, or attributes, making development more efficient. I hope this article will be helpful for you to learn jQuery to change properties!

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