I am using the following code to changePage from First.html
$.mobile.changePage("Second.html", { transition: "slide" });
But this is neither calling document.ready on Second.js or pageshow or pagecreate events.
How do I call a method in Second.js after Second.html is loaded?
I would guess your problem is related to placement of your Second.js file.
When loading intermediate pages, jQuery Mobile will strip whole page and load only BODY content. This is because jQuery Mobile uses AJAX for page handling. Only first (initial) page is fully loaded into the DOM. For other pages it is not necessary to load everything, no point if you already have whole page loaded into the DOM.
Read this article to find more about this problem. You will find several working solution.
Related
I'm using a bootstrap theme that requires a few javascript files. On some of my pages I load quite a bit of content from the server which means not all the html will be on the page at the time the javascript files are evaluated.
This prevents the event handlers from binding to the html that's loaded after the javascript is evaluated. So far I've fixed the problem by loading the scripts after the ajax call is finished, but this seems pretty hokey to me. Here's my function:
$.get("/path/to/rest/call", function(data) {
$('#htmlElement').html(data);
}).done(function() {
$.getScript("/path/to/js/file.js");
});
I feel like there's a better way to do this. Is there?
There may be a cleaner way of solving this than dynamically loading the metroui library. It looks like it depends upon jQuery's .ready() to know when the page is loaded and when it can initialize it's things. But, that doesn't work for you because you are dynamically loading content via Ajax.
What you can do is you can hold off the jQuery ready() notification until after your ajax content is loaded. This will then hold off the firing of metro's initialization until after your dynamic content is loaded. This would allow you to load metro in a stock <script> tag in the <head> section like their doc suggests. The way this works is you add this to the <head> section, after jQuery is loaded:
<script>
jQuery.holdReady(true);
</script>
Then, after your ajax code has succesfully completed, you do this (from the success handler, after you've put your new content into the page):
jQuery.holdReady(false);
which then releases jQuery to call it's .ready() handlers and metro will do it's thing after your content is loaded.
See jQuery doc for jQuery.holdReady(...).
I have a website with a background and a main container. I wanted to hide the container until the whole page has been loaded. so i added
#cover{opacity:0}
at the start of the page and
$(window).load(function() {
$('#cover').css('opacity','1');
});
at the end, just before </body> tag. It works perfectly when page is loaded for the first time.
PROBLEM : If I load the same page once more, it shows all the images and text scattered throughout the page. It works fine once completely loaded. certainly this type of behavior is caused by cached images. but all the images are inside the main container which has opacity:0, This has completely confused me.
UPDATE 1:
I am using turn.js to convert the whole container into a book, i want the book become visible when the book is ready i.e. both loading of images and javascript initialization has completed.
UPDATE 2:
This is how i am checking for "images loaded" and "javascript initialized". it worked as i wanted it to. is this a good way to handle the situation?
$(window).load(function(){
$(window).ready(function() {
$('#cover').css('opacity','1');
});
});
$(window).ready(function(){
$(window).load(function() {
$('#cover').css('opacity','1');
});
});
The problem may be related to your $('window').onload();
Take some time and read this SO post.
what-is-the-difference-between-window-load-and-document-ready
load is called when all assets are done loading, including images.
ready is fired when the DOM is ready for interaction.
From the MDC, window.onload:
The load event fires at the end of the document loading process. At
this point, all of the objects in the document are in the DOM, and all
the images and sub-frames have finished loading.
From the jQuery API
documentation, .ready( handler ):
While JavaScript provides the load event for executing code when a
page is rendered, this event does not get triggered until all assets
such as images have been completely received. In most cases, the
script can be run as soon as the DOM hierarchy has been fully
constructed. The handler passed to .ready() is guaranteed to be
executed after the DOM is ready, so this is usually the best place to
attach all other event handlers and run other jQuery code. When using
scripts that rely on the value of CSS style properties, it's important
to reference external stylesheets or embed style elements before
referencing the scripts.
Let me know if this change works.
You do not call the same block in your CSS (#container) and in your JS (#cover).
Here's my conundrum:
My website uses PJAX to load HTML into the '#main' container for each page.
Each page has its own specific javascript file. E.g: 'dashboard.index.js', 'inbox.index.js' and so on.
Note: All libraries are preloaded on the first load of the page through PreloadJS to avoid javascript compilation overhead.
The first load of the page is perfect, no worries, since it is a normal HTML load.
However if i come back to this page again, PJAX won't reload the javascript file, given it's already in the DOM.
What i tried so far & didn't work perfectly:
Place javascript file at the bottom of 'main' container. PJAX transfers it to the 'HEAD' of the DOM and won't load it the second time around.
Place in-line scripts in the 'main' container to execute functions of each page. Fails since the code is executed before JS libraries are loaded.
Bind 'PJAX success' event and execute function. Unable to determine which function to execute based on current loaded page.
Hence, my question:
Is there any strategy to load specific javascript files associated to each page?
When loading HTML from pjax, i added a 'data-js' attribute to the div, which contained the name of the function to call upon successfully loading HTML.
Then it was just a matter of using the 'pjax:success' event to call the function.
The way JQM loads pages is by getting the element with the attribute data-role="page" via ajax, and not the whole document.
So, how do I make JQuery Mobile load the styles and scripts from any page (or a refresh), rather than only loading them in the entry point (index.htm)?
Just put them into the BODY tag.
It is described in my other answer: Why I have to put all the script to index.html in jquery mobile
Thanks, I had all my JS on one file, but the jquery, jqm, and jqm css files needed to be on each page too. What I ended up doing was including a script on each page body that checks if the scripts exist. If they were not there, they would be dynamically added.
It would be like this
if (document.getElementsByTagName('script') < 3)
{
createElement
setAttribute
append inside head element
//repeat for each script / styleshet
}
else
//do nothing
If I went the route of including all the files in the body, there would be a redundancy of the assets being requested on each page change. I believe this gets around it. It seems to work so far.
So I am having a hard time getting $.mobile.changePage to function properly. I call it like this:
$.mobile.changePage( "DataformsM-AddRecord.html", { transition: "slide"} );
But for some reason, when the HTML page is loaded, none of the external .js (the files that I wrote to actually do something) are included. I am following the significant loading conventions of
-Jquery
-(CUSTOM JS)
-Jquery Mobile
Does anyone know why this is not getting loaded properly? Also, the pageshow function is not getting fired either, which is strange. It looks like this:
$("div[data-role*='page']").live('pageshow', function(event, ui) {
loadFormFields();
});
Now the page is rendered, but none of the functional things happen. If I hack it and do something like this:
document.location.href="DataformsM-AddRecord.html";
It will function properly.
jQuery Mobile does not pull the whole page into the dom, it grabs the first data-role="page" element and its descendants and pulls that into the current dom.
So any scripts in the <head> of the document will not be included.
I generally put all the functional JavaScript for my site on the index page and then when external pages are loaded into the dom they can benefit from the already loaded scripts.
Also, you can place JavaScript code inside the data-role="page" element and it will be included when jQuery Mobile does its AJAX load of the page.
UPDATE
A good system for this is to put all of your JS into an include file and include it on each page of the site. It will be ignored if pages are brought into the DOM by AJAX, but if someone refreshes somewhere in your site, the JS will be available.
So building off of what Jasper so wisely noted above, I came up with a working solution.
Basically I Load up all of my JS and CSS files into the index page to start. Now when you load, this method will be triggered for the pageshow
$("div[id*='page1']").live('pageshow', function(event, ui) {
setTimeout(function() { window.scrollTo(0, 1) }, 100);
doStuffWhenPageintializes();
});
Once I call the $.mobile.changePage( "someOtherPage.html", { transition: "slide"} );, the pagehide method will get fired for the page1 object. This is where you can trigger the method to initialize the page you are transitioning to.
$("div[id*='page1']").live('pagehide', function(event, ui) {
setTimeout(function() { window.scrollTo(0, 1) }, 100);
loadStuffForNewPage();
});
Now you can remove the document.location.href="external.html" line and simply use the native JQM call. Hope this helps some people.
Kindly repeat the head section with all the scripts in each html page, since change page will cause reload of pages and will re create head section...
a simple change page like this would then work:
$.mobile.changePage('abc.html', {
transition: 'slide'
});
It seems that there is no "right" way provided by JQM to load external html files. Thanks a bunch to Jasper for the solution.
JQM suggests an AJAX reload if we want to switch to external pages, like:
<a href="foo.html" rel="external">
or
<a href="foo.html" data-ajax="false">
I tried both but they didn't work - I"m programming for native apps, so maybe it may work for web apps?
I solved this by putting script in the head section of last loaded page that helped and worked for me. JQM is not getting the head section of recently loaded page in the DOM so not bringing the JS content of the recent page. By putting all the script in an External JS file or by putting it in the head section of very first page might do the trick for you.
I too am looking for this solution the "correct way" for loading external pages. However, I will concur, that your hack does indeed work. I'll take the hack for now:
$(document).ready(function(){
$("#page1").bind('ended', function(){
$.mobile.changePage($(document.location.href="external.html"), 'fade');
});
});