e =事件|| window.event; 语句在Firefox中无法正常工作

Question

I am new to Javascript and jQuery so i have very silly doubt please bear with me

$(document).click(function () {
    alert("!");
    var e = event || window.event;  
    alert("!");
});

if i click on any part of the webpage then i should get two alerts with "!" as the text, it is working as expected in Chrome. In Firefox it is alerting only once

http://jsfiddle.net/Wu2Gh/8/

Answer 1

Since you use jQuery, all you need to do is:

$(document).click(function (event) {

});

jQuery handles the browser differences and always passes an event object to the handler.

I recommend to read the jQuery tutorial about event handling .

Answer 2

There is no event variable you are referring to. The Event object is the argument to the handler function. It should be

$(document).click(function (event) {
    alert("!");
    var e = event || window.event;  
    alert("!");
});

Answer 3

try this.you are not passing event parameter to function

$(document).click(function (event) {
    alert("!");
    var e = event || window.event;  
     alert("!");
});

Answer 4

You have an error "event is not defined" why dont you get the event this way:

$(document).click(function (event) {
  alert("!");
  var e = event || window.event;  
  alert("!");
});

Answer 5

The event is obviously undefined. So that line of code is causing a stop. You need to send the event to the click function.

$(document).click(function(event){


});