jQuery load-event after replaceWith - javascript

i'm trying to ajax load some content and then replace existing content on the page with the newly downloaded content. The problem is that I need to bind load(handler(eventObject)) event for replaced data. I need that to trigger when all images are loaded. Here is what I have so far:
$("#mainContentHolder").live("load", function(){
alert("images loaded!")
});
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data);
alert("content is loaded!");
});
I see an alert when the content is loaded, but it happens before images are loaded and alert on images load never happens (I also tried bind() instead of live() before).
Does anyone know a fix for that?

This may or may not be your problem, but it looks like the container you have attached your image load function to is being replaced when you load the ajax content:
$("#mainContentHolder").live("load", function(){ //you are attaching to current and future '#mainContentHolder' elements
alert("images loaded!")
});
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data); //'#mainContentHolder' element is replaced with something else
alert("content is loaded!");
});
Not sure what content is coming back from your AJAX call, but if it doesn't have a #mainContentHolder element, there will be nothing for your image load event handler to attach to.
If that's not it, there's also this bit: (from http://api.jquery.com/load-event/)
It is possible that the load event will not be triggered if the image is loaded from the browser cache. To account for this possibility, we can use a special load event that fires immediately if the image is ready. event.special.load is currently available as a plugin.
Hopefully one of those will help you out.

Is it possible to put the $.get into the live load function?
$("#mainContentHolder").live("load", function(){
alert("images loaded!");
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data);
alert("content is loaded!");
});
});

Related

Check if image can be loaded

I have a page with lots of images on it. My images are loaded from an external server. Usually this server it's loading tooooooooo slow, so my page stay loading until the external server starts running again. I want to put a blank image loaded from mine when the external server is down.
Is there any method to do something like this?
if ($("img").load=false) {
$("img").src="cantload.png";
}
Thank you so much, in advance!
If you're using jquery, and this piece of code happens before the binding of the image.
$("img").error(function() {
alert("Could not load image");
});
If not, then you could do something like this, which will always work, but will need to be on each image:
<img src="image.gif" onerror="alert('Could not load image.')">
If you want to activate this function after the elements are already in the DOM, you can use something like this.
var defaultSource = 'cantload.png';
$('img').each(function() {
var originalSource = $(this).attr('src');
$(this)
.attr('src', defaultSource)
.error(function(){
$(this).attr('src', defaultSource );
})
.attr('src', originalSource);
});
The above code would bind the inner function to handle the images' loading errors, and then make them all reload. The pictures that are already reloaded won't be actually reloaded again, but those with the errors will trigger the error handler and change the source attribute into cantload.png
jsFiddle Demo

I want to make sure function comes after loading of external HTML

How do I make sure the alert comes after the loading of the external HTML?
function changeContent(){
$('#contentmain').load("contentmain.html", function(){
alert("something");
}
)}
I've been playing around with $(document).ready, but no luck so far.
Many thanks!
Update:
The result of this code is that it depends (on what, I don't know): sometimes the alert comes first, sometimes it comes second...
Your code is right.
From the jquery documentation:
Callback Function
If a "complete" callback is provided, it is executed after post-processing and HTML insertion has been performed. The callback is fired once for each element in the jQuery collection, and this is set to each DOM element in turn.
are you loading iFrames?
try the .load() function.
$('#iframeID').load(function(){
// I am totally loaded and lets begin the hunt now.
});
Alternatively, If you are loading content via ajax, you can use .ajaxComplete
$(document).ajaxComplete(function(){
// ajax call has completed and lets begin the hunt now.
});

extend jquery load() function to show spinner inside div

is there a way to alter .load behavior so that it load a spiner inside any div that is loading data ?
example
<div class='content lside'></div>
<script>
$(document).ajaxStart(function() {
$('body').append('<div class="notice" style="position:fixed;top:40%;left:30%;z-index:99999;"id="loadingspin">loading</div>'); });
$(document).ajaxStop(function() {
$('#loadingspin').fadeOut().remove();
});
$('.content').load("<?=base_url();?>booking/<?=$day?>");
</script>
i use above script.
but what i actually want is that when ever ajaxstart the content of $('.content') is replaced with spinner until it finish loading the new content.
so is there a way i can extend .load to do that by it self and replace the ajaxstart,
so where ever $(div).load() is called a $(div).html('spiner'); is fired.
if not, is there a way .ajaxstart can reference the div that the content will be loaded into ?
please note: im currently using .ajaxstart and .ajaxstop in my header script in all my webpage to handle showing the spinners in general, but i want to replace it/extend it with div specific solution that would still work on any page without further editing into each and every ajax request.
thanks
probably something like this should do the trick. Override jQuery's prototype and save the old function.
(function(){
var oldLoad = jQuery.fn.load;
jQuery.fn.load = function( url, data, complete ){
/*
* do your stuff
*/
oldLoad.call( jQuery, url, data, complete );
}
})();
That changes the globally available jQuery.load() method for the whole page so »your stuff« should be executed even if other scripts call that method, a least after your re-definition of that function is parsed.

Execute $(document).ready() after $.load(), is that possible or is there an Alternative

I have page with a form and a table (to show results of the saved data using the form).
The form uses ajax to submit the data, data saved and the table should be reloaded afterwards.
The problem is that the table (which is loaded using AJAX($.load)) is loaded after the execution of $(document).ready(). which implies that the table does not have the required functionality.
Is there any approach where i can postpone the execution of $(document).ready() until the AJAX finish its loading, or shall i use a complete different approach like using iframe?
below is an example of my problem:
$(document).ready(function(){
//some code here that needed for the html in table.html e.g. datepicker, chosen, jqueryui, etc
});
<form>
//Inputs with a button to submit using ajax, where the result is displayed using table.php
</form>
<div id="tableOfContent"></div>
<script>
$('#tableOfContent').load("table.php");
</script>
You can do
$('#tableOfContent').load("table.php",function(){
//completed load actions here
});
But you should note that if you load images, they will not be loaded yet. If that is the case, you can make the contents of table.php initially hidden and do the same again inside for $('#tableOfContent img').load(). This would work for 1 image; multiple images is a bit more complicated, but feel free to ask if that is what you are looking for :)
You can delay the ready event using jQuery.holdReady():
$.holdReady(true);
// Do your custom stuff... the document may already be loaded.
$.holdReady(false); // Now the ready event will fire as soon as the DOM is loaded.
See http://api.jquery.com/jQuery.holdReady/
document.ready is called when the HTML of the page has finished loading, there's no two ways about it.
What you can do, however, is use live binding, which will attach handlers to elements that are not yet on the page.
Example:
$(".datepicker").live("click", function() {
$(this).datepicker();
})
Updated for jQuery >1.7 (this is also faster)
$("#tableOfContent").on("click", ".datepicker", function() {
$(this).datepicker();
})
Load the table data from within the ready function and use the complete event of the load() function to call the remainder
$(document).ready(function() {
// click bindings etc ..
$('#tableOfContent').load("table.php",function() {
// things to do once the table is loaded
});
});
load() documentation
$(document).ready() should be used for scripts that should execute, well, when document is ready.
If you need to execute something after an ajax call, you may write everything within a function and call it with the ajax callback.
function what_i_need() {
// bla bla
}
<script>
$('#tableOfContent').load("table.php", {}, what_i_need);//code had syntax error; '{)'
</script>
I'm not sure. Plus, you can call the function when document is ready too.
$(document).ready(function(){
what_i_need();
});

How can I tell when all images on a page are loaded using jQuery?

I’m using jQuery for my project. $(function(){...}) fires the function “when the DOM is ready” — this doesn’t say that all images are loaded, right?
Is there an event that gets fired when every image is loaded too?
I guess you mean
http://api.jquery.com/ready/
versus
http://api.jquery.com/load-event/
Example: Run a function when the page is fully loaded including graphics.
$(window).load(function () {
// run code
});
without jQuery:
window.onload=function() {
alert(document.images.length);
}
You can check on load event of image tag. This will get fired when image loading completes.
$("img").load(function(){
// your code
});
window.onload will solve this, I wrote about this there: http://amrelgarhy.com/blog/how-to-tell-when-images-have-loaded/

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