How to fix the jslint message: variable is already defined

Question

I was trying to implement the following code:

var action = function (e) {     
    if (!e) {
        var e = window.event;
    }
    e.cancelBubble = true;
    i         


        

Answer 1

In the function, actually e has been defined as argument. so when you define some variable same as arguments, it will complains.

Answer 2

Using a named argument creates a locally scoped variable (which is what var does). Since you have an argument e and you use var e you are trying to create the variable twice.

Remove the var from where you use e the third time time.

var event = function (e) {      // First time
    if (!e) {                   // Second time
        e = window.event;       // Third time