Trigger event on body load complete js/jquery

Question

I want to trigger one event on page load complete using javascript/jquery.

Is there any way to trigger event or call a simple function once page loading fully comple

Answer 1

This will call function when the DOM structure is ready

$(document).ready(function () {
        userCommission();
        //Show commision box
        $('#userroles').change(function(){
           userCommission();
        });

        function userCommission() {
           var roles = $('#userroles').val();
           var result = roles.map(function (x) { 
                return parseInt(x, 10); 
            });
            var i = result.indexOf(6);           
            console.log(i);
            if(i == -1) {
                console.log('inside');
                $('.user-commission :input').attr("disabled", true);;
                $('#user-commission').hide();
            } 
        } });

Answer 2

jQuery:

$(function(){
  // your code...this will run when DOM is ready
});

If you want to run your code after all page resources including images/frames/DOM have loaded, you need to use load event:

$(window).load(function(){
  // your code...
});

JavaScript:

window.onload = function(){
  // your code...
};

Answer 3

When the page loads totally (dom, images, ...)

$(window).load(function(){
    // full load
});

When DOM elements load (not necessary all images will be loaded)

$(function(){
    // DOM Ready
});

Then you can trigger any event

$("element").trigger("event");

Answer 4

Everyone's mentioned the ready function (and its shortcuts), but even earlier than that, you can just put code in a script tag just before the closing body tag (this is what the YUI and Google Closure folks recommend), like this:

<script type='text/javascript'>
pageLoad();
</script>
</body>

At this point, everything above that script tag is available in the DOM.

So your options in order of occurrence:

1. Earliest: Function call in script tag just before closing the body tag. The DOM is ready at this point (according to the Google Closure folks, and they should know; I've also tested it on a bunch of browsers).

2. Earlyish: the jQuery.ready callback (and its shortcut forms).

3. Late, after all page elements including images are fully loaded: window onload event.

Here's a live example: http://jsbin.com/icazi4, relevant extract:

</body>
<script type='text/javascript'>
  runPage();

  jQuery(function() {
    display("From <tt>jQuery.ready</tt> callback.");
  });

  $(window).load(function() {
    display("From <tt>window.onload</tt> callback.");
  });

  function runPage() {
    display("From function call at end of <tt>body</tt> tag.");
  }

  function display(msg) {
    var p = document.createElement('p');
    p.innerHTML = msg;
    document.body.appendChild(p);
  }
</script>

(Yes, I could have used jQuery for the display function, but I was starting with a non-jQuery template.)