Develop Reference

How to bind event Jquery to page?

I have Jquery function that executes AJAX query to server.
How can I call this after load page in the specified url page? May I bind this to element HTML, I mean:
<div id="graph" onload="function()"></div>

jQuery handles the HTML file with a variable called document.
Document has two popular event states
load when the page has been loaded
ready when the page has been loaded and all other decorations to the HTML have been applied.
jQuery provides hooks for these states.
To run javascript code after each of the events listed above, you have to put the function within the appropriate event scope.
For loading, this would be…
$(document).load(function() {
// javascript code you want to execute
})
After the page has been ready, but not yet rendered, you can apply some other javascript code using
$(document).ready(function() {
// javascript code you want to execute
})

One way using jQuery:
$(document).ready( function() {
//do whatever you need, you can check if some element exists and then, call your function
if($("#graph").length > 0)
callfunction();
});
No jQuery, only vanilla js:
window.onload = function() {
if(document.getElementById("graph"))
callfunction();
}

How to bind a future event when using jQuery Mobile external page linking?

In jQuery Mobile, the external page is linked via Ajax (i.e. the content of the external page is loaded into current page via Ajax).
The problem is: How to bind a event on the future (i.e. to be loaded) content?
Let say the content to be loaded has the following HTML input
<input type='text' id='foo' name='foo'>
How to bind a input event on it?
With just static HTML, the following code would work
$('#foo').on('input', function () {
...
Now it didn't work now since the DOM is loaded dynamically, I tried to use delegation but also not work
$(document).on('#foo', 'input', function () {
...
Any idea?

You can include the script in the external page as long as the script tag is within the data-role="page" div (Only the content of the first found data-role="page" element is loaded into the current page.
$(document).on("pagecreate", "#extpagedivid", function(){
$(document).on("input", "#foo", function(){...});
});
You can also include this code in the pagecreate handler of the main page as long as you are using event delegation. Make sure the ID of the input is unique across all pages that will be loaded into the main page.

How about using var
var myFunc = function() { ... }
$(document).ready(function() {
$('#foo').on('input', myFunc );
});

Javascript creating some weird "cache"

I searched for some solution and I couldn't find anything.
I have a project using the CodeIgniter and is basically AJAX-based (because I can't refresh the page). My view and my JS are on different files and every time I load a view, I load your respective JS file.
When I load a JavaScript file and then I call another page (and, consequently, a new JavaScript), even though I remove the JavaScript of the previous page from header, their functions keep alive, causing some times double calls or weird calls.
I.E.:
I have a register page with an <ul id=tabs> and an artist page with an another <ul id=tabs> (they are distinct pages).
On JavaScript to register, I have the following function:
$(document).on("click", "#tabs li", function() {
album.change($(this));
if ($("#tabs").find('li').length < 7 && $(this).is(':last-child')) album.create();
});
And, on JavaScript to artist page, I have this function:
$("#tabs li a").on("click", function(e) {
var target = base_url+hash[1];
tab = $(this).data("tab");
$("#tabs li").removeClass('active');
$("."+tab).parent().addClass("active");
$(".tab").hide();
$("#"+tab).fadeIn(100);
if (tab == "bio-tab") {
slider.photo();
target = target+"/bio";
}
($(document).find(".artist.intro").length > 0) ? $(document).scrollTop("520") : $(document).scrollTop("90");
History.pushState(null, null, target);
e.preventDefault();
});
When I click on a li of <ul id=tabs> on artist page, it executes both functions.
It looks like AJAX is creating something like a cache of my JS files, or something like this. There is a way to destroy the file after I change the page?
JIT, set the ajaxcache to false is not an alternative because all my AJAX requests are by post.

You should use $("#tabs li").on("click", function() { instead of $(document).on("click", "#tabs li", function() {.
When passing a second parameter to the .on function which is an element list, jQuery registers a live event (the same as the .live() function in earlier versions of jQuery), which means the event will be attached to any dynamic loaded content as well

I think you are loading same js libraries again and again. try loading script libraries like this:
<script>window.jQuery || document.write('<script src="js/vendor/jquery-1.11.0.min.js"><\/script>')</script>

How to get Anchor Links to work in Jquery Mobile?

Jquery Mobile has decided to treat anchor links as page requests of sort. However, this isn't good if you have a load of blog posts which have anchor links to the same page (ie href="#specs").
Is there a way to disable jquery mobile's anchor link usage on a specific page which I know I won't be using it on so I can use anchor links as they were intended, to drop down to a part of the page?
I only need a solution for anchor links on the same page (ie: href="#specs").
thanks

You could try adding a data-ajax="false" on the anchor tag.
Linking without Ajax
Links that point to other domains or that have rel="external",
data-ajax="false" or target attributes will not be loaded with Ajax.
Instead, these links will cause a full page refresh with no animated
transition. Both attributes (rel="external" and data-ajax="false")
have the same effect, but a different semantic meaning: rel="external"
should be used when linking to another site or domain, while
data-ajax="false" is useful for simply opting a page within your
domain from being loaded via Ajax. Because of security restrictions,
the framework always opts links to external domains out of the Ajax
behavior.
Reference - http://jquerymobile.com/demos/1.0.1/docs/pages/page-links.html

If you are like me, converting an existing site and you don't want to go through every page right now. You can add one line of code to your header and all of your header and all of your existing internal anchor links will get the data-ajax="false" tag added.
Of course, this assumes you are including your own javascript file up in the header already. If you are not you would have to touch every page anyway. But I have a single javascript file that is included in every page already so I added this line...
$("a").each(function () { if(this.href.indexOf("#")>=0) $(this).attr("data-ajax",false); });
This goes in your $(document).ready() block. If you don't have that block yet, here is the entire block.
$(document).ready(function() {
$("a").each(function () { if(this.href.indexOf("#")>=0) $(this).attr("data-ajax",false); });
});
Hope this helps. It is the same solution user700284 offers but in an automated way.

You can add the following code to the end of your page:
<script type="text/javascript">
$('a.native-anchor').bind('click', function(ev) {
var target = $( $(this).attr('href') ).get(0).offsetTop;
$.mobile.silentScroll(target);
return false;
});
</script>
And add the class "native-anchor" to your anchor links.
It is not a total sollution, because the back button of your browser will move you to the previous page and not to the position of the link, but it is better than the links not working at all.
I found this sollution here: jQuery Mobile Anchor Linking

$(document).bind("mobileinit", function () {
$.mobile.ajaxEnabled = false;
});

First you have to place this code into a custom.js file
$(document).bind('mobileinit', function () {
$.mobile.loader.prototype.options.disabled = true;
$.mobile.ajaxEnabled = false;
$.mobile.linkBindingEnabled = false;
$.mobile.loadingMessage = false;
});
Then add this file into your webpage before the jquery mobile js is loaded. becuase 'mobilinit' event is triggered immediately

Thank you
this solution worked for me
<script>
$(document).ready(function() {
$("a").each(function() {
if (this.href.indexOf("index.php") >= 0) $(this).attr("data-ajax", false);
});
});
</script>
I replaced # with index.php which is my document root.
But, it doesn't work for form button i.e input type="submit"

// On page load on mobiles only, look for the specific a tag you want to take control over,
// alternatively you can still target all 'a' tags
$('a[href*="#component"]').each(function () {
// then set data-ajax to false,
$(this).attr("data-ajax", false);
// at this point you can add the class to your target a tags.
// You can do it elsewhere but because for this example my
// 'a' tags are automatically generated so I just add the class here
$(this).addClass('in-pagelink');
// then target the class and bind to a click event
$('a.in-pagelink').bind('click', function (ev) {
// here I redirect the page with window.location.assign
// as opposed to window.location.href. I find that it works better
window.location.assign(this.href);
// then I close my navigation menu
closeAll();
});
});

Jquery manage local script with full ajax site

Basically my app work like that :
Index.php manage call to other pages.
Each page contains 2 function onLoad() and onClose() which are redefined in each page
Index.php call the pages and execute the onLoad
Basically, i preload the page in a hidden div, i execute the predefined $.onLoad function and the i put the loaded content into a visible div
My question is only about the onLoad() scope, i want to remove code from the jquery eval seq when i change page, but i need a way to define it in the page.php file without knowing the container
The eval/seq is probably the eval queue of jquery, can't found info about that, just obtain with firebug...
In 2 words, i would like to be able to remove injected dom and script when i change context (pages)
index.php
$.onLoad = function() {}
$("#blabla").onChange(function() {
$("#data_iframe").load(chaineUrl, {}, function(responseText, textStatus, XMLHttpRequest) {
$("#data_iframe").ready(function() {
$("#data_div").children().remove();
$.onLoad();
$("#data_iframe").children().hide().appendTo($("#data_div")).show(); $("#data_iframe").children().remove();
$.onLoad = undefined;
}
});
});
page.php
<script>
$.onClose = (function(){
$('#container').blablabla();
//alert("test");
});
$.onLoad = (function(){
$('#container').blablabla();
}
</script>
The problem is that the jquery EVAL/SEQ keep growing each time a page is opened
and there are some side-effect like calling multiple time a function...
I guess its a scope problem so can you help me correct my code
(i've try with or without the $ but doesn't change anything)
just for information
<div id="data_div"></div>
<div id="data_iframe"></div>
Thanks

I usually use $(document).ready instead of onload. No need to do the "onload" trigger in load complete function. The ready function within the page.php will do the same job.
And how about direct load into data_div?
index.php
$("#blabla").onChange(function() {
$("#data_div").load(page.php);
});
page.php
<script>
$(document).ready(function() {
$('#container').blablabla();
});
</script>
I didn't try page close function before, may be it is not what you want. But you can try:
<script>
$(document).ready(function() {
$('#container').blablabla();
$(window).unbind('unload');
$(window).unload(function(){
$('#container').blablabla();
//alert("test");
})
});
</script>