How to change image address using jQuery-Front-end Q&A-php.cn

How to change image address using jQuery

PHPz

Release： 2023-04-05 13:55:24

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With the rapid development of Internet technology, various websites are increasingly using JavaScript-related technologies to achieve various dynamic effects. Among them, jQuery is undoubtedly the most popular JavaScript library. In actual website development, we often use various functions of jQuery, such as the function of changing the image address.

So, how to use jQuery to change the image address? Let’s explain it in detail below.

Step 1: Introduce the jQuery library

Before using jQuery, we need to introduce the jQuery library into the web page. For specific methods, please refer to the following code:

<head>
  <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
</head>

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Here, we use CDN to introduce the jQuery library, or you can download the jQuery library file and introduce it through a local file.

Step 2: Write HTML code

Write a piece of HTML code in the body tag, including two pictures. Here we assume that there are two pictures, and their addresses are "image1.jpg" and "image2.jpg".

<body>
  <img class="image1" src="image1.jpg">
  <img class="image2" src="image2.jpg">
</body>

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Step 3: Use jQuery to change the image address

Next we use jQuery to change the image address.

$(document).ready(function() {
  $('.image1').attr('src', 'new_image1.jpg');
  $('.image2').attr('src', 'new_image2.jpg');
});

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In this code, we use jQuery's attr() method to modify the src attribute value of the image. Note that "new_image1.jpg" and "new_image2.jpg" here are our own defined image addresses, which need to be changed according to the actual situation when modifying them.

Step 4: Test the code effect

Add the above code to the footer part of the web page file, save the file and open the web page in the browser. If everything goes well, the addresses of both images on the web page will be changed and the new images will be displayed.

Summary

Through the above steps, we can use jQuery to change the image address. Of course, in addition to using the attr() method, jQuery has many other methods that can be used to modify the properties of images or implement more complex operations. I won’t go into detail here, and interested readers can continue to learn more.

In short, as a powerful JavaScript library, jQuery has a wide range of applications, and mastering its skills is very important for front-end developers. I hope this article can be helpful to beginners, and I hope everyone can continue to learn and improve their technical level.

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