What is the use of sprite images?

Sprite is CSS Sprite, some people also call it CSS sprite. It is a CSS image merging technology. Its functions are: 1. Reduce the number of requests to the server when loading web page images; 2. Improve the loading of the page. Speed; 3. Reduce some bugs when the mouse slides over; 4. Solve web designers' troubles in naming pictures; 5. Conveniently change styles.

#The operating environment of this article: Dell G3 computer, Windows 7 system.

css sprite is CSS Sprite, some people also call it CSS sprite. It is a CSS image merging technology. This method is to merge small icons and background images into one picture, and then use css background positioning to display the part of the image that needs to be displayed.

In fact, all the sporadic pictures involved in a page are included into one big picture. In this way, when the page is accessed, the loaded pictures will be It won't be displayed slowly one by one like before.

The basic principle of CSS Sprite is to integrate some images used on your website into a single image, thereby reducing the number of HTTP requests for your website.

What is the use of sprite pictures?

1. Reduce the number of requests to the server when loading web page images

You can merge most background images and small icons for easy use in any location, so that requests from different locations only need to call A picture, thereby reducing the number of requests to the server, reducing server pressure, while improving the page loading speed and saving server traffic.

2. Improve page loading speed

One of the benefits of sprite technology is the loading time of images (the loading time of a single image when there are many sprites). A GIF composed of the required images will be significantly smaller than the combined size of all the images.

A single GIF has only one associated color table, while each separately split GIF has its own color table, which increases the overall size. Therefore, a single JPEG or PNG sprite is likely to be smaller in size than the total size of an image divided into multiple images.

3. Reduce some bugs when the mouse rolls over There will be flashing white phenomenon. Using CSS Sprite, since one picture is enough, this phenomenon will not occur.

4. It solves the problem of web designers in naming pictures. They only need to name a collection of pictures. There is no need to name every small element, thus improving the production of web pages. efficiency.

5. It is easy to change the style. You only need to modify the color or style of one or a few pictures, and the style of the entire web page can be changed. Maintenance is more convenient.

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