I am working on a jQuery Mobile app that needs to show content based on a reference in the URL location hash, e.g.
http://theapp/page.html#key1234
Obviously, jQuery Mobile will search through the page looking for an internal page with id "key1234". It will fail and then show a blank page. What I'd like to do is capture an event when a URL with an unknown hash is entered, and then dynamically generate a matching page for it.
I'd like to do it this was so that users can have short memorable URLs.
Is this possible?
$( document ).bind( "pageloadfailed", function( event, data ){
});
Related
I've got a two page jQuery mobile app, and within the init function, the following code..
Call to the init function
$(document).on('pageinit', function(){
MyPages.init();
});
init: function() {
$('td[id$="drops"]').each(function() {
console.log("Element: " + $(this).attr('id'));
}),
};
I have elements in page one that match the above, such as '#early_drops', '#late_drops', etc. These elements do not exist on page 2, but when page 2 loads, the elements are displayed in the console just like when page 1 is loaded. What am I missing here?
Thanks very much,
-Adam vonNieda
By default jQuery loads pages using AJAX into the existing page in order to allow the animated transitions. If you don't want this you just need to 'turn off' the AJAX loading.
See description here: http://view.jquerymobile.com/1.3.2/dist/demos/widgets/links/
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.
You can also disable AJAX across the entire app by default using global configuration: http://api.jquerymobile.com/global-config/
I'm developing an application using jQuery mobile, that will be using HTML5 offline capabilities (cache manifest, etc).
Basic program is for on-field technicians to view/modify their orders on a tablet with no internet connection. I'm using a local browser database to store the orders.
I have an orders.html page which can view any order - but to pass a parameter to it, I can't use GET parameters, because the program is offline and I can't list every single order in the manifest.
So I have to use hash parameters - eg orders.html#o4572. But jQuery mobile doesn't play nice with this scheme - it uses hash parameters for it's own schemes. When I'm on list.html and there's a link to orders.html#o4572 - it turns the link into list.html#o4752 and stays on the same page.
I can turn off jQuery mobile's link handling by setting $.mobile.linkBindingEnabled = false; but this prevents all ajax navigation - you lose the nice transitions, and pop-up dialogs don't 'just work' anymore, you have to do them manually. And there may be other issues.
Is this the only way of getting this to work properly? I'm just starting to use jQuery mobile, so I feel like I'm missing something.
I have done something similar using the jquery-mobile-router plugin with a single page app that has a offline mode, however it should work the same for a multipage app since with a multi-page app the default behavior (ajax-enabled set to true) of JQM is that it pulls in the second page and attaches it to the DOM of the current page.
Using the JQM router you should be able to do something like this
var router;
var orderHandlerRoute = function (eventType, matchObj, ui, page, evt) {
var params = router.getParams(matchObj[1]);
//use your params to pull data from localStorage
};
router = new $.mobile.Router({
'orders.html(?:[?/](.*))?' : {handler: "orderHandler", events: 'bs'}
, {orderHandler: orderHandlerRoute }
});
You should indeed not use hash parameters for anything else than selecting pages when using jquery mobile.
The standard way to proceed is to pass your parameter with file.html?parameter=value and to retrieve the value through javascript.
You can then process this value with a js function that can for instance retrieve the data with an ajax call if you are online, or read it from local storage if you are offline.
This can be done either by binding the changepage event if you want to generate your pages dynamically based on the data associated to the parameter, or by binding the pageinit event if you want to alter the page after it has been displayed (for instance fill in form elements)
Alternatively, if the use of the cache manifest prevents you from usingthe ?parameter=value syntax, you can use the following approach:
- write your target link as file.html#pagename_itemvalue
- bind the pagechange event in order to override the default behaviour, and instead parse the target value, retrieve pagename and itemvalue, and generate/access the content you want to display. You can see an example of that on this page
I'm trying to build some custom navigation in a dynamic application, all screens are obtained from the server and thus I registered the pagebeforechange event and execute my own function.
Everything works as I expected except when I refresh the data I destroy the dynamic pages and try to call the page I was in again using the page Id, but this second time, although my code creates the HTML for the page, jQuery Mobile throws an "c.data("page") is undefined" error.
I bind the pagebeforechange event:
$(document).bind('pagebeforechange', function(e, data) {
if(typeof data.toPage === 'string') {
appobj.dynamicPage(data.toPage, data.options);
}
});
Then in the dynamicPage method I create the HTML for my page based on Underscore.js templates and let jQuery continue changing the page:
$.get('templates/page.tpl.html', function (data) {
html = _.template(data, { /* several template parameters */});
});
page = $(html);
page.appendTo('body').page();
The idea was to use as much of jQM as possible since I'm creating the destination page and injecting it into the DOM.
When I need to update the supporting data, that I store in localStorage, I just find all dynamic pages and destroy them:
var current = $.mobile.activePage.attr('id');
$('.dynamicpage').remove();
$.mobile.changePage('#' + current
When running the application I can easily navigate between various screens/pages, even for pages that don't exist when the application starts but if the data needs to be updated (because the user added elements in the application of data in the database changed) then the removal code is executed but the old page is not regenerated ending in a white page with all the DOM contents hidden, but the page I wanted to navigate too seems to be in the DOM (at least firebug tells me so).
If I were to restart development I would probably use Backbone.js to handle my model updates and view changes but for now I'll have to use only jQM. Any suggestions? I understand that jQM is not finding my page but I don't see why since my event should be called and the page regenerated, even with the allowSamePageTransition flag set.
Regards,
Sérgio Lopes
So I've just started learning jQuery Mobile, and I've learned how it loads all links via ajax without actually loading the next page. Several of my pages use forms and GET to pass data on to the next page-- How can I do this while using jQuery Mobile?
One thing that I think is cool about JQM is that you don't have to use parameters to pass data between pages. Since you're in the same DOM as the first page, you can access data using plain old variables, i.e.
field1 = $('[name=field1]').val();
field2 = $('[name=field2]').val();
And so long as you're using the ajax feature of JQM you could do the following in the next page:
$('.title').text(field1);
I made a jsfiddle example for you.
Other ways would be to use the localStorage or sessionStorage api or there are also some plugins mentioned in the docs.
page params
JQM router plugin
Commonly, there 2 method for transfer parameter between jQuery Mobile page.
Modify Ajax address at first page, and parse the ajax to get parameter in next page.
Using HTML5 sessionStorage, a kind of WebStorage, to transfer parameter.
This is the method use ajax address to transfer parameter.
How to pass and get Parameters between two Pages in Jquery Mobile?
Using sessionStorage/localStorage to transfer parameter, you can add this code at first page,
<a href="#page_Parameter1" onclick="sessionStorage.ParameterID=123">
Before go to next page, parameter id is storaged into sessionStorage.
</a>
In next page, you can use this method to take parameter content,
$('#page_Parameter1').live('pageshow', function(event, ui) {
alert('Parameter ID: ' + sessionStorage.ParameterID);
});
I'm trying to get a getJSON result to update an HTML element on page load, within a jquery mobile loaded website.
Now, I've read I should not rely on ready(), but bind to pageInit. So I tried, but it just won't work. I've tried many other events that could be logical to try within the API event documentation, without any success.
The closest I come to success is after the page is loaded, via ajax, if I refresh the page manually (with the browser's refresh button), getJSON does update the corresponding HTML element. And you guess, it's not what I want to achieve. Here is what the code looks like now, and where it is placed...
<div data-role="page">
<script>
$( '#pageContainer' ).live( 'pageinit',function(event){
//an alert() here does fire right before the page is shown in the browser
//here is the getJSON code.
});
</script>
Now, I need help to try to figure how to make it work. I only want an element X in the page to update with the text returned from a jSON when the page appears in the browser! Like a normal ready() function would have done !
(Maybe it is relevant to specify I'm running RC2 ?)
If you can't use JSONP here, have you tried setting a setTimeout()? You have to trigger a callback after the json object is loaded so timing is essential.