.page-title i{background-size:179px 175px;background-image:url(../../images/public/public.gif@22);}
This CSS, If you double-click the webpage to open it, you can see this picture. If you open it in IIS, you cannot see this picture.
If the @22 at the end of the picture name is removed, and the @22 at the end of the picture itself is also removed, there will be no problem.
Can an expert explain why we need to add @22 after the picture name? , what are the benefits?
Reply to the discussion (solution)
Solve the cache problem
Are all the image suffixes the same? IIS can be set to browse without image suffix format, search for details.
The advantage is probably that it prevents others from downloading it

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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