Use timestamps to solve browser cache problems and timestamps to solve browser cache Problems

Use timestamps to solve browser cache problems and timestamps to solve browser cache Problems

In IE or many other browsers, if each request address is the same, the browser will not connect to the server but read the cache, which is very good for many applications, it can reduce the server pressure or reduce the bandwidth usage. However, for ajax applications, many of them must maintain a connection from time to interact with the server. Therefore, you need to use a small trick, time stamp to make each request address different, thus skipping the browser cache

This function is also a common method for image verification codes.