On the weekend, I studied the implementation of sprite graphics. Let’s first learn about sprite pictures. Sprite pictures mean css sprites, and they are also called css sprites. That is, merge the small icon and background image into one image, and then use the background positioning of CSS to display the part of the image that needs to be displayed.
1. Benefits and advantages:
Effectively reduce the number of http requests on the website and speed up the display of images.
2. Conditions:
- Static pictures, pictures do not change according to changes in user information.
- Small pictures with relatively small capacity (2~3k).
- The image loading capacity is relatively large.
Note: It is not recommended to use Sprite images for large pictures. If the picture is so big, it will be invincible after disassembly, and the loading will be slow, which is not worth the loss! ! !
3. Principle : Use css3's background-position to control a layer Display the size of the area and slide the background image through a window .
To put it simply, use this attribute to set the starting position where the background image needs to be displayed, and control the display range of the background image through labels .
4. Let’s first understand the background-position attribute,
Based on the picture:
- Take the upper left corner as (0,0) coordinates
- x and y are both negative values
In summary, the value of background-position is the starting coordinate of the background image display, in the form of background-position: 0, 0;
5. Jigsaw puzzle: You can use PS or many online sprite image generation tools on the Internet to generate sprite images.
I used an online puzzle tool to manually drag and drop the comments, which is a bit disgusting~~haha
In fact, the best puzzle is to control the margins of each icon and the amount of white space around the icon. If the coordinates of the background-position of the css are written regularly, it will be much better (however, this I dragged it manually, and the position is very irregular, so the coordinate values below are all taken after debugging)
After talking about this, we can get to the main topic, html and css code. The following code is to imitate a menu~~~
6. Code:
<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">id</span><span style="color: #0000ff;">="content"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><span style="color: #800000;">ul </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="content"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 3</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-1"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 4</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 5</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>女装/男装/内衣<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 6</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 7</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-2"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 8</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 9</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>鞋靴/箱包/配件<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">10</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">11</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-3"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">12</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">13</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>童装玩具/孕产/用品<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">14</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">15</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-4"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">16</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">17</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>家电/数码/手机<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">18</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">19</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-5"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">20</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">21</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>美妆/洗护/保健品<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">22</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">23</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-6"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">24</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">25</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>珠宝/眼镜/手表<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">26</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">27</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-7"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">28</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">29</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>运动/户外/乐器<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">30</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">31</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-8"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">32</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">33</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>游戏/动漫/影视<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">34</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">35</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-9"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">36</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">37</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>美食/生鲜/零食<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">38</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">39</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-10"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">40</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">41</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>鲜花/宠物/农资<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">42</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">43</span> <span style="color: #0000ff;"><span style="color: #800000;">li </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="cat-11"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">44</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span> <span style="color: #008080;">45</span> <span style="color: #0000ff;"><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>房产/装修/建材<span style="color: #0000ff;"></span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span> <span style="color: #008080;">46</span> <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #008080;">47</span> <span style="color: #0000ff;"></span><span style="color: #800000;">ul</span><span style="color: #0000ff;">></span> <span style="color: #008080;">48</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
<span style="color: #008080;"> 1</span> <span style="color: #800000;"> <style type="text/css">
</style></span><span style="color: #008080;"> 2</span> <span style="color: #800000;"> #content</span>{
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 180px</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;"> background</span>:<span style="color: #0000ff;"> #f8f8f8</span>;
<span style="color: #008080;"> 5</span> <span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 1px solid #bbb</span>;
<span style="color: #008080;"> 6</span> }
<span style="color: #008080;"> 7</span> <span style="color: #800000;"> h3</span>{
<span style="color: #008080;"> 8</span> <span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>;
<span style="color: #008080;"> 9</span> <span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 0</span>;
<span style="color: #008080;">10</span> }
<span style="color: #008080;">11</span> <span style="color: #800000;"> ul</span>{
<span style="color: #008080;">12</span> <span style="color: #ff0000;"> list-style</span>:<span style="color: #0000ff;"> none</span>;
<span style="color: #008080;">13</span> <span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 0</span>;
<span style="color: #008080;">14</span> }
<span style="color: #008080;">15</span> <span style="color: #800000;"> li h3</span>{
<span style="color: #008080;">16</span> <span style="color: #ff0000;"> font-size</span>:<span style="color: #0000ff;"> 14px</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;"> font-weight</span>:<span style="color: #0000ff;"> 400</span>;
<span style="color: #008080;">18</span> }
<span style="color: #008080;">19</span> <span style="color: #800000;"> li</span>{
<span style="color: #008080;">20</span> <span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 3px 10px 0 0</span>;
<span style="color: #008080;">21</span> <span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> block</span>;
<span style="color: #008080;">22</span> <span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 31px</span>;
<span style="color: #008080;">23</span> <span style="color: #ff0000;"> line-height</span>:<span style="color: #0000ff;"> 31px</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;"> overflow</span>:<span style="color: #0000ff;"> hidden</span>;
<span style="color: #008080;">25</span> <span style="color: #ff0000;"> border-bottom</span>:<span style="color: #0000ff;"> 1px solid #dedede</span>;
<span style="color: #008080;">26</span>
<span style="color: #008080;">27</span> }
<span style="color: #008080;">28</span> <span style="color: #800000;"> li i</span>{
<span style="color: #008080;">29</span> <span style="color: #ff0000;">background</span>:<span style="color: #0000ff;"> url(sprite.png)</span>;
<span style="color: #008080;">30</span> <span style="color: #ff0000;">display</span>:<span style="color: #0000ff;"> inline</span>;
<span style="color: #008080;">31</span> <span style="color: #ff0000;">width</span>:<span style="color: #0000ff;"> 40px</span>;
<span style="color: #008080;">32</span> <span style="color: #ff0000;">height</span>:<span style="color: #0000ff;"> 28px</span>;
<span style="color: #008080;">33</span> <span style="color: #ff0000;">float</span>:<span style="color: #0000ff;"> left</span>;
<span style="color: #008080;">34</span> }
<span style="color: #008080;">35</span> <span style="color: #800000;"> .cat-1 i</span>{
<span style="color: #008080;">36</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -7px -5px</span>;
<span style="color: #008080;">37</span> }
<span style="color: #008080;">38</span> <span style="color: #800000;"> .cat-2 i</span>{
<span style="color: #008080;">39</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -2px -35px</span>;
<span style="color: #008080;">40</span> }
<span style="color: #008080;">41</span> <span style="color: #800000;"> .cat-3 i</span>{
<span style="color: #008080;">42</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -7px -65px</span>;
<span style="color: #008080;">43</span> }
<span style="color: #008080;">44</span> <span style="color: #800000;"> .cat-4 i</span>{
<span style="color: #008080;">45</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -7px -105px</span>;
<span style="color: #008080;">46</span> }
<span style="color: #008080;">47</span> <span style="color: #800000;"> .cat-5 i</span>{
<span style="color: #008080;">48</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -7px -129px</span>;
<span style="color: #008080;">49</span> }
<span style="color: #008080;">50</span> <span style="color: #800000;"> .cat-6 i</span>{
<span style="color: #008080;">51</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -7px -151px</span>;
<span style="color: #008080;">52</span> }
<span style="color: #008080;">53</span> <span style="color: #800000;"> .cat-7 i</span>{
<span style="color: #008080;">54</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;">-60px -4px</span>;
<span style="color: #008080;">55</span> }
<span style="color: #008080;">56</span> <span style="color: #800000;"> .cat-8 i</span>{
<span style="color: #008080;">57</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;">-56px -33px</span>;
<span style="color: #008080;">58</span> }
<span style="color: #008080;">59</span> <span style="color: #800000;"> .cat-9 i</span>{
<span style="color: #008080;">60</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -56px -66px</span>;
<span style="color: #008080;">61</span> }
<span style="color: #008080;">62</span> <span style="color: #800000;"> .cat-10 i</span>{
<span style="color: #008080;">63</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;">-60px -103px</span>;
<span style="color: #008080;">64</span> }
<span style="color: #008080;">65</span> <span style="color: #800000;"> .cat-11 i</span>{
<span style="color: #008080;">66</span> <span style="color: #ff0000;"> background-position</span>:<span style="color: #0000ff;"> -51px -128px</span>;
<span style="color: #008080;">67</span> }
<span style="color: #008080;">68</span>
<span style="color: #008080;">69</span> <span style="color: #800000;"> </span>
7. The rendering is as follows:
That’s it for the application of sprites~~Please point out if there are any mistakes~~Hahaha
Difficulty in updating caching of official account web pages: How to avoid the old cache affecting the user experience after version update?Mar 04, 2025 pm 12:32 PMThe official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,
How to efficiently add stroke effects to PNG images on web pages?Mar 04, 2025 pm 02:39 PMThis article demonstrates efficient PNG border addition to webpages using CSS. It argues that CSS offers superior performance compared to JavaScript or libraries, detailing how to adjust border width, style, and color for subtle or prominent effect
What is the purpose of the <datalist> element?Mar 21, 2025 pm 12:33 PMThe article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159
How do I use HTML5 form validation attributes to validate user input?Mar 17, 2025 pm 12:27 PMThe article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.
What are the best practices for cross-browser compatibility in HTML5?Mar 17, 2025 pm 12:20 PMArticle discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.
What is the purpose of the <progress> element?Mar 21, 2025 pm 12:34 PMThe article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati
What is the purpose of the <meter> element?Mar 21, 2025 pm 12:35 PMThe article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex
How do I use the HTML5 <time> element to represent dates and times semantically?Mar 12, 2025 pm 04:05 PMThis article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Zend Studio 13.0.1
Powerful PHP integrated development environment
Notepad++7.3.1
Easy-to-use and free code editor
Atom editor mac version download
The most popular open source editor
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
