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<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> /* entire container, keeps perspective */ /** * 【perspective: number|none;】 * 属性定义 3D 元素距视图的距离，以像素计。该属性允许您改变 3D 元素查看 3D 元素的视图。 * 当为元素定义 perspective 属性时，其子元素会获得透视效果，而不是元素本身。 */ .flip-container {perspective: 1000;} /* flip the pane when hovered */ .flip-container:hover .flipper, .flip-container.hover .flipper {transform: rotateY(180deg);} .flip-container, .front, .back {width: 320px;height: 480px;} /* flip speed goes here */ /** * 【transition: property duration timing-function delay;】 * 过渡动画 （transition: width 2s;） * transition-property：规定设置过渡效果的 CSS 属性的名称。（width） * transition-duration：规定完成过渡效果需要多少秒或毫秒。（2s） * transition-timing-function：规定速度效果的速度曲线。（ease-in-out） * transition-delay：延迟时间，以秒或毫秒计。 */ /** * 【transform-style: flat|preserve-3d;】 * 使被转换的子元素保留其 3D 转换 * flat：子元素将不保留其 3D 位置。 * preserve-3d：子元素将保留其 3D 位置。 */ .flipper {transition: 0.6s;transform-style: preserve-3d;position: relative;} /* hide back of pane during swap */ /** * 【backface-visibility: visible|hidden;】 * 定义当元素背面是否可见。 */ .front, .back {backface-visibility: hidden;position: absolute;top: 0;left: 0;} /* front pane, placed above back */ .front {z-index: 2;} /* back, initially hidden pane */ .back {transform: rotateY(180deg);} </style> </head> <body> <div class="flip-container" ontouchstart="this.classList.toggle('hover');"> <div class="flipper"> <div class="front"> <!-- 前面内容 --> <a href="http://www.webhek.com/css-flip/"> <img src="/static/imghwm/default1.png" data-src="http://www.webhek.com/wordpress/wp-content/uploads/2014/03/hacker.jpg" class="lazy"/ alt="CSS image flip example_html/css_WEB-ITnose" ><br /> </a> </div> <div class="back"> <!-- 背面内容 --> <a href="http://www.webhek.com/css-flip/"> <img src="/static/imghwm/default1.png" data-src="http://www.webhek.com/wordpress/wp-content/uploads/2014/03/hack-logo.jpg" class="lazy" style="max-width:90%"/ alt="CSS image flip example_html/css_WEB-ITnose" > </a> </div> </div> </div> <script src="js/jquery-1.8.3.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> </script> </body></html> 来自
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,
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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
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