I've been digging into an issue where I have a Rails 7 application with importmap-rails and Turbo that's sometimes working in Firefox/Safari, and sometimes not. Essentially, this looks like #161 still ...

3.3、在readystatechange事件中，先判断响应是否接收完成，然后判断服务器是否成功处理请求，xhr.status 是状态码，状态码以2开头的都是成功，304表示从缓存中获取，上面的代码在每次请求的时候都加入了随机数，所以不会从缓存中取值，故该状态不需判断。