jquery replace body background

In the process of web page production, the background is a very important element, which can add interest and beauty to the web page. In some cases, we may need to change the background of a web page programmatically. jQuery is a very convenient framework for this purpose.

This article will introduce how to use jQuery to change the background of a web page. Specifically, we will discuss how to use jQuery to change the background of the body element of a web page. This can be applied to scenarios such as changing the background color, background image, gradient background, etc. of the entire page.

1. Common methods of jQuery

Before using jQuery to change the background of a web page, we need to understand some common methods of jQuery to better understand the subsequent code implementation.

1. Selector

Similar to CSS selectors, jQuery selectors are also tools used to select HTML elements. For example, we can use $("element") to select a specified element.

2. CSS Method

jQuery’s css method is used to modify the CSS attribute value of an HTML element. For example, you can use $("element").css("property", "value") to modify the CSS properties of the specified element.

3. Animation methods

jQuery also provides some animation methods, such as fadeIn, fadeOut, slideUp and slideDown, etc., for achieving dynamic effects. These methods can be used in conjunction with CSS methods to quickly achieve animation effects.

2. Use jQuery to change the background of the web page

Now, let’s take a look at how to use jQuery to change the background of the body element of the web page.

1. Change the background image

Changing the background image of the body element of a web page is a relatively common operation. The following code implements the effect of changing the background image when the page is loaded:

$(document).ready(function() {
  $('body').css('background-image', 'url(new_background.jpg)');
});

In the above code, we use the document's ready method to execute the code after the page is loaded. Then, we used jQuery's css method to change the background image of the body element to new_background.jpg.

2. Change the background color

If we want to change the background color of the body element of the web page, the following code can achieve it:

$(document).ready(function() {
  $('body').css('background-color', 'red');
});

In the above code, We change the background color of the body element to red.

3. Add gradient background

If we want to add a gradient background, we can use the linear gradient property of CSS3. The following code can implement a gradient background from red to blue:

$(document).ready(function() {
  $('body').css('background', 'linear-gradient(to bottom, red, blue)');
});

In the above code, we use the linear gradient property of CSS3 to implement a gradient background from red to blue.

3. Summary

In this article, we introduced how to use jQuery to change the background of the body element of the web page. We applied jQuery's selector, css method and animation method to the actual code to realize changes to the background image, background color and gradient background. In the actual web page production process, we can write specific codes according to our needs to achieve more colorful background effects.

The above is the detailed content of jquery replace body background. For more information, please follow other related articles on the PHP Chinese website!