javascript - Recently, when processing business logic, I unbind the same element first and then bind again, and found a usage problem.

Question

After unbinding first, bind sometimes fails. Some business requirements no longer need to be bound, and some need to be re-bound.
The following is a simple example

window.onload=function(){
   $("input").unbind();
}            
$("input").bind("click",function(){
   alert("1");
})

This cannot be rebinded

Written like this, you can bind

        $("input").unbind();
        $("input").bind("click",function(){
            alert("1");
        })

Ask the reason for this problem? Expert analysis

Answer 1

The execution order is different. The unbind in onload is executed after the bind below, so you bind first, then unbind after onload

Answer 2

You bound a click event to the input, but the click event was removed from your window.onload