What happens if multiple scripts set [removed]?

Question

There are a number of posts on StackOverflow and other websites regarding the problem of avoiding namespace collisions. In my scenario, I just want a method in my JavaScript to

Answer 1

It'll be overriden . In Javascript, when you define handle event like

window.onload = function(){
   console.log("in Load function 1");

};
window.onload = function(){
  console.log(" In load function 2");
};

That will make an " assign " window.onload => function() . And window.onload will be assign to last function .

But in jQuery, You can handle event in many times and the browser will make all

$("body").on("click",function(){
console.log("make a callback function 1");
});
$("body").on("click",function(){
console.log("make a callback function 2");
});

Because jQuery make a callback not "assign". Hope it helps you.