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README.md

JQuery Mobile Angular Adapter

Description

Integration between jquery mobile and angular.js. Needed as jquery mobile enhances the pages with new elements and styles and so does angular. With this adapter, all widgets in jquery mobile can be used directly in angular, without further modifications. Furthermore, this adapter also provides special utilities useful for mobile applications.

If you are interested in how to build mobile web apps with this adapter, have a look at the german book Mobile Web-Apps mit JavaScript.

Dependencies

  • angular 1.0.3
  • jquery 1.7.1
  • jquery mobile 1.2.0 Final

Examples

Reporting Issues

  • Issues can be reported at the Github project.
  • Please provide a jsfiddle, using this template.

Usage

Note: The directive ng-app for the html element is required, as in all angular applications.

Plain

Include this adapter after angular and jquery mobile (see below).

<html ng-app>
<head>
    <title>MobileToys</title>
    <link rel="stylesheet" href="lib/jquery.mobile.css"/>
    <script src="lib/jquery.js"></script>
    <script src="lib/jquery.mobile.js"></script>
    <script src="lib/angular.js"></script>
    <script src="lib/jquery-mobile-angular-adapter.js"></script>
</head>

With requirejs 2.x

Create a index.xhtml file like the one below:

<html ng-app>
<head>
    <title>MobileToys</title>
    <link rel="stylesheet" href="lib/jquery.mobile.css"/>
    <script src="lib/requirejs.js" data-main="main.js"/>
</head>
<body>
   ... your jqm pages ...
</body>
</html>

And a main.js file with the following content:

require.config({
  shim:{
    'angular':{ deps:['jquery'], exports:'angular'}
  }
});
function tryHoldReady() {
  if (!tryHoldReady.executed && window.jQuery) {
    window.jQuery.holdReady(true);
    tryHoldReady.executed = true;
  }
}
tryHoldReady();
require.onResourceLoad = tryHoldReady;
require([
  "jquery",
  "jquery-mobile-angular-adapter",
  ... // your controllers, angular modules, ...
], function (jquery) {
  jquery.holdReady(false);
});

Notes:

  • This assumes that all libs are in the root folder of your webapp. To put them into a subfolder like lib use the paths argument in the call to require.config (e.g. paths: {angular: lib/angular}, ...)
  • The libraries jQuery, jQuery Mobile and the adapter are already AMD modules. Only angular is not, which is why we need a shim config for it.
  • We simulate a later load event of the document by using jQuery.holdReady, by which we wait until all modules have been loaded. This is needed as the normal load event may occur before all modules have been loaded by requirejs. Note that this functionality was already included in requirejs 1.x, but no more in requirejs 2.x.
  • Usage of manual bootstrap of angular does not work well with jquery-mobile, as jquery-mobile relies on the jQuery ready event to be fired at the right time.

Directory layout

This project follows the usual maven directory layout:

  • src/main/webapp: The production code
  • src/test/webapp: The test code
  • compiled: The result of the javascript compilation
  • compiled/min: Contains the minified files.

Build

The build is done using maven and node js.

  • mvn clean package: This will create a new version of the adapter and put it into /compiled.
  • mvn clean package -Ptest -Dbrowser=<path to your browser>: As above, but will also execute the unit and ui tests.

Results of the build:

  • compiled/jquery-mobile-angular-adapter-<version>.js: The adapter in one file, without dependencies.
  • compiled/jquery-mobile-angular-adapter-standalone-<version>.js: The adapter in one file including jquery, jquery-mobile and angular. If you want to do something during the initialization of jquery-mobile, use the following callback: window.mobileinit = function() { ... }

Running the tests

  • mvn clean integration-test -Ptest: This will do a build and execute the tests using js-test-driver. The browser that is used can be specified in the pom.xml.
  • mvn clean package jetty:run: This will start a webserver under localhost:8080/jqmng. The unit-tests can be run via the url localhost:8080/jqmng/UnitSpecRunner.html The ui-tests can be run via the url localhost:8080/jqmng/UiSpecRunner.html

Navigation and routes

The adapter integrates angular routes with jquery mobile in the following way:

  • If no route is defined, the default jquery mobile url handling applies:
    • Navigation to a hash shows the page whose id is the same as the hash, e.g. <a href="#somePage">.
    • Navigation to a normal page loads that page using ajax and then navigates to that page, e.g. <a href="somePage.html">
  • You can set the special property jqmOptions on routes, e.g.

    $routeProvider.when('/somePage', {
        templateUrl:'someTemplate.html',
        jqmOptions: { transition: 'flip' }
    });
    

    Those properties are directly passed to $.mobile.changePage. For a documentation of the available options have a look at the jquery mobile documentation.

  • You can set the special property onActivate in routes. If this is set, it will be evaluated in the scope of the page to which the route navigates to, before the pagebeforeshow event.

    This expression can also use the properties from $route.current.locals, which are calculates by the resolve entry of the route. E.g.

      $routeProvider.when('/somePage', {
          templateUrl:'someTemplate.html',
          onActivate: 'someFn(someParam)',
          resolve: {someParam: function() { return 'hello'; }}
      });
    
      function SomePageController($scope) {
         $scope.someFn = function(someParam) {
            expect(someParam).toBe('hello');
         }
      }
    
  • Please also look at the extensions to the $location service for controlling history and changing route params for just one route call.

Default routing: basePath+$location.url()

  • E.g. for a page /somePath/somePage.html and location.url()=='/page1' this results in /somePath/page1.
  • To be compatible to plain jquery mobile the adapter creates a default routing for all urls that are not mapped by other routes.
  • If a document contains the link <a href="somePage"> and the user clicks on that link, angular updates $location.url to /somePage. However, in plain jquery mobile, this should load the page /somePath/somePage. This is why we append the basePath to the $location.url().

Notes:

  • Internally, we use jquery mobile to load the pages and do the transition between the pages. By this, we automatically support the prefetching and caching functionality for pages from jquery mobile (see their docs for details). E.g. use <a href="prefetchThisPage.html" data-prefetch> ... </a> in a parent page to prefetch a child page.
  • We always enable $locationProvider.html5Mode and set $locationProvider.hashPrefix('!'). By this, we are compatible to the default jquery mobile behaviour, e.g. links like <a href="somePage.html"> are possible and do not reload the whole page but use AJAX.
  • If you want to start an app directly on a subpage, use the following url:
    • For an external page that should be loaded using ajax: index.html#!/somePage.html
    • For an internal page that is also contained in the index.html:index.html#/!index.html#someOtherPage(yes, this url contains 2 hashes). If you are sure that all browsers that you use support the new history API, you can also use the url index.html#someOtherPage` to start at an internal page.
  • jQuery mobile automatically creates a <base> tag for the main page and sets it's href-attribute to the main page. There are some parts of angular that use this fact, so keep it in mind when debugging errors.

Restrictions:

  • controllers on routes are not supported. Please use ng-controller within the page to be loaded for this or the onActivate function on routes. The reasoning behind this is that some pages of jquery mobile are local pages in the same document as the main page and others are loaded using ajax. However, the pages in the same document are compiled at the same time the main page is compiled. Furthermore, by supporting the page cache of jquery mobile assigning a controller would also not be possible. To pass data via routes just let your controllers examine the current route using the $route and $routeParams service.
  • Routes with a templateUrl must point to a full jquery mobile page. Loading parts of jquery mobile pages is not supported.
  • The ngView directive cannot be used as jqm pages need to be inserted at a special place in the DOM. However, the adapter takes care of the normal ngView handling and inserts the pages at the right place.
  • There needs to be an initial page in the main document of the application. I.e. a <div data-role="page"> within that html file that also includes angular and jqm. All other pages can then be included using routes with a templateUrl property.

Scopes

Every page of jquery mobile gets a separate scope. The $digest of the global scope only evaluates the currently active page, so there is no performance interaction between pages.

For communicating between the pages use the ngm-shared-controller directive (see below).

Directives, Filters and Services

Directive ngm-shared-controller

Syntax: <div ngm-shared-controller="name1:Controller1,name2:Controller2, ...">

Mobile pages are small, so often a usecase is split up into multiple pages. To share common behaviour and state between those pages, this directive allows shared controllers.

The directive will create an own scope for every given controllers and store it in the variables as name1, name2, .... If the controller is used on more than one page, the instance of the controller is shared.

Note that the shared controller have the full scope functionality, e.g. for dependecy injection or using $watch.

Event-Directives of jQuery Mobile

The following event directives are supported (see http://jquerymobile.com/demos/1.2.0/docs/api/events.html):

  • ngm-tap,taphold,
  • ngm-swipe,ngm-swiperight,ngm-swipeleft,
  • ngm-vmouseover,ngm-vmouseout,ngm-vmousedown,ngm-vmousemove,ngm-vmouseup,ngm-vclick,ngm-vmousecancel,
  • ngm-orientationchange,
  • ngm-scrollstart,ngm-scrollend,
  • ngm-pagebeforeshow,ngm-pagebeforehide,ngm-pageshow,ngm-pagehide

Usage: E.g. <a href="#" ngm-swipeleft="myFn()">

Directive ngm-if

The directive @ngm-if allows to add/remove an element to/from the dom, depending on an expression. This is especially useful at places where we cannot insert an ng-switch into the dom. E.g. jquery mobile does not allow elements between an ul and an li element.

Usage: E.g. <div ngm-if="myFlag">asdfasdf</div>

Service $history

Note: This service is for internal purposes only (same level as $browser). Please use $location.backMode() or $location.goBack() instead.

Methods and Properties:

  • $history.go(relativeIndex): This will directly call window.history.go(relativeIndex).
  • $history.urlStack: This contains the list of visited urls
  • $history.activeIndex: This defines the currently active index in the urlStack

Service $location (extensions)

  • $location.routeOverride(someOverride): By this, you can override route properties only for the next routing. This is useful e.g. for passing special parameters to the onActivate expression. The following properties of routes can be overridden:

    • jqmOptions: Options to give to $.mobile.changePage of jquery mobile (e.g. transition, ...)
    • locals: the resolved functions from the resolve hash in a route.
    • onActivate: the expression to evaluate on the target page with the locals.

      E.g.

      $location.routeOverride({ locals: {someKey: 'someValue'}, jqmOptions: {transition: 'pop'} }); $location.path('/someRoutePath');

      function SomePageController($scope) { $scope.someActivateFn = function(someKey) { expect(someKey).toBe(someValue); } }

  • $location.backMode(): This will try to go back in history to the url specified by $location. E.g. if the navigation path to the current page is page1->page2->page3 and we then call $location.path('page1'); $location.backMode() this will go two steps back in history. Note that this is in analogy to the already existing angular method $location.replace.

  • location.goBack(): This will go one step back in history: call $location.backMode() and fill the url of $location by the last entry in the browser history.

Service $waitDialog

The service $waitDialog allows the access to the jquery mobile wait dialog. It provides the following functions:

  • show(msg, callback): Opens the wait dialog and shows the given message (if existing). If the user clicks on the wait dialog the given callback is called. This can be called even if the dialog is currently showing. It will the change the message and revert back to the last message when the hide function is called.
  • hide(): Restores the dialog state before the show function was called.
  • waitFor(promise, msg): Shows the dialog as long as the given promise runs. Shows the given message if defined.
  • waitForWithCancel(promise, cancelData, msg): Same as above, but rejects the promise with the given cancelData when the user clicks on the wait dialog.

Default messages are:

  • $.mobile.loader.prototype.options.textWithCancel: for waitForWithCancel. This is a new property.
  • $.mobile.loader.prototype.options.text: for all other cases, see the jquery mobile docs.

Filter paged: Paging for lists

Lists can be paged in the sense that more entries can be additionally loaded. By "loading" we mean the display of a sublist of a list that is already fully loaded in JavaScript. This is useful, as the main performance problems result from DOM operations, which can be reduced with this paging mechanism.

To implement this paging mechanism, the angular filter paged was created. For displaying a page within a list, simply use:

list | paged:'pagerId':12

This returns the subarray of the given array with the currently loaded pages.

Parameters:

  1. The first parameter is required and must be unique for every usage of the paged filter. It is the property name in the scope which stores the state of pagination for this filter usage, and also contains the function loadMore and hasMore (see below).
  2. If the second parameter is a number, it is interpreted as the pageSize. If this parameter is omitted, the default page size is used. This is by default 10, and can be configured using

    module(["ng"]).value('defaultListPageSize', 123);

For filtering and sorting the paged array, you can use filter chaining with the angular filters filter and orderBy, e.g.

list | filter:{name:'someName'} | orderBy:'name' | paged:'pagerId'

To show a button that loads the next page of the list, use the following syntax:

<a href="#" ngm-if="pagerId.hasMore" ngm-vclick="pagerId.loadMore()">Load More</a>
  • pagerId is the id used in the paged filter.
  • pagerId.hasMore returns a boolean indicating if all pages of the list have been loaded.
  • pagerId.loadMore() loads the next page into the list.

The following example shows an example for a paged list for the data in the variable myList:

<ul data-role="listview">
    <li ng-repeat="item in list | paged:'pager1'">{{item}}</li>
    <li ngm-if="pager1.hasMore">
        <a href="#" ngm-vclick="pager1.loadMore()">Load more</a>
     </li>
</ul>

Note: pagerId.cache stores the last result that was returns for a list | paged:'pagerId' expression. This can be used to check whether the paged list is empty, .. without refiltering the list.

Notes on the integration of some jqm widgets

widget collapsible

  • The attribute data-collapsed has bidirectional data binding, e.g.

    <div data-role="collapsible" data-collapsed="someProperty">...</div>
    

widget checkboxradio

  • using ng-repeat with a checkbox or radio button without a wrapper element can be done like the following:

    <label ng-repeat="l in [1,2]">
        {{l}}
        <input type="checkbox">
    </label>
    

Integration strategy

Jquery mobile has two kinds of markup:

  • Stateless markup/widgets: Markup, that does not hold state or event listeners, and just adds css classes to the dom. E.g. $.fn.buttonMarkup, which is created using <a href="..." data-role="button">
  • Stateful markup/widgets: Markup that holds state (e.g. event listeners, ...). This markup uses the jquery ui widget factory. E.g. $.mobile.button, which is created using <button>.

Integration strategy:

  1. We have a precompile phase: This is called before the angular compiles does it's work, i.e. before $compile is called, and before directive.template and directive.templateUrl is evaluated. Here, we trigger the jqm create and pagecreate event. Before this, we instrument all stateful jqm widgets (see above), so they do not really create the jqm widget, but only add the attribute jqm-create=<widgetName> and jqm-link=<widgetname> to the corresponding element. By this, all stateless markup can be used by angular for stamping (e.g. in ng-repeat), without calling a jqm method again, so we are fast. Furthermore, we have special handlers in the precompile phase for those jqm widgets that wrap themselves into new elements (checkboxradio, slider, button, selectmenu, search input), as the angular compiler does not like this. Finally, we also mark all jqm pages with the jqm-page attribute. This is needed as jqm pages are represented as data-role=page in the dom and angular does not allow to create directives that only match pages but not other jqm widgets.

  2. We have the directive ngmPage: This creates an own scope for every page. By this, we are able to disconnect the scope of the pages that are not visible right now. This is important for optimizing performance. This creates the jqm pages by calling element.page() in the pre link phase, however without the pagecreate event. By this, we only create the page instance, but do not modify the dom (as this is not allowed in the pre link phase). Furthermore, the page jqm widget instance is already available for the other widgets, which are created in the post link phase.

  3. We have the directive ngmCreate: This will create the jqm widgets in the post link phase. For widgets that wrap themselves into new elements this needs to be called for the wrapper, that was already created in the precompile phase. This is important as the jqm widgets do more DOM transformations during creations that the angular compiler does not like (e.g. the jqm widget <input type="checkbox>" enhances the sibling <label> element and wraps that element). By calling the widget during the post link phase of the wrapper element those DOM modifications are ok with angular.

  4. We have the directive ngmLink: Here we listen for changes in the model and refresh the jqm widgets when needed and vice versa. For elements that wrap themselves into new elements this will be called on the original element (e.g. the <input> for <input type="checkbox"> elements), in contrast to the ngmCreate directive.

  5. All together: This minimizes the number DOM traversals and DOM changes

    • We use angular's stamping for stateless widget markup, i.e. we call the jqm functions only once, and let angular do the rest.
    • We do not use the jqm create event for refreshing widgets, but angular's directives. By this, we prevent unneeded executions of jquery selectors.
    • We reuse the selectors in jqm for detecting which elements should be enhanced with which jqm widgets.

Ohter possibilities not chosen:

  • Calling the jqm "create"-Event whenever the DOM changes (see the jqm docs). However, this is very slow, as this would lead to many DOM traversals by the different jqm listeners for the "create"-Event.

Integration of jqm routing and angular routing:

  • We chose to use the angular routing, as it is very flexible and programmable, and it is easier to integrate jqm routing with angular routing and the other way around.
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