Is there any Js event or function which fires or executes before any action?

Question

由于AngularJs有一个指令onLocationChange()和C#具有onActionExecute() ，因此在Javascript中是否有类似这样的事件在整个网站中的任何动作之前执行。

Answer 1

from your question it seems like you want to observe user navigation ie: when ever address bar location gets changed.

You can use an older method detecting whenever page gets refresh

window.addEventListener('beforeunload', function (e) {
    // perform  something here
}, false);

for SPAs (Single page applications you can use hashchange

//detecting hashchange
window.onhashchange = function() { 
     //code  
}