The principle is actually to add A date value with a different value to achieve the purpose of non-duplicate addresses, allowing the browser to load the file in real time every time without reading the file from the cache.
is very useful for dynamic verification codes and other situations where files need to be loaded multiple times.
Practical application examples of this website
http://www.jb51.net/tools/files.shtml
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
