CSS is Cascading Style Sheets. CSS technology is used in WEB development to effectively control page layout, fonts, colors, backgrounds and other effects. With just a few simple modifications, you can change the look and format of your web pages. CSS3 is an upgraded version of CSS. This new set of standards provides richer and more practical specifications, such as: box model, list module, hyperlink method, language module, background and border, text effects, multi-column layout, etc. Currently, there are Many browsers have successively supported this upgraded specification, such as: Firefox, Chrome, Safari, Opera, etc.
1.CSS3 can make rounded tables
Corresponding attribute: border-radius
2. Specially formulated text effect attributes. In the past, adding special effects to text on web pages could only use the filter attribute. CSS3 has specially formulated an attribute to add text effects, and it does not only add shadow effects.
Corresponding attribute: font-effect
3. The styles of link underlines are enriched, including wavy lines, dotted lines, dotted lines, etc. You can also change the color and length of the underline arbitrarily, and there are also corresponding effect styles of the horizontal line, the effect is similar to the underline
Corresponding attribute: text-underline-style
text-underline-color
text-underline-mode
text-underline-position
4. The function of marking has been added. When taking notes, we usually click a few dots or make a circle below to express the key points. The CSS3 industry has begun to add this function
Corresponding attribute: font-emphasize-style
font-emphasize-posintion
CSS3 border properties:
border-color:
border-image:
border-corner-image
border-radius
CSS3 background properties:
background-origin
border
Padding
content
background-clip
background-size
Multiple-backgrounds
CSS3 text effect:
text-shadow
text-overflow

The 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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