Martin Staffa
656c8fa8f2
input[radio] and inout[checkbox] now listen on the change event instead of the click event. This fixes issue with 3rd party libraries that trigger a change event on inputs, e.g. Bootstrap 3 custom checkbox / radio button toggles. It also makes it easier to prevent specific events that can cause a checkbox / radio to change, e.g. click events. Previously, this was difficult because the custom click handler had to be registered before the input directive's click handler. It is possible that radio and checkbox listened to click because IE8 has broken support for listening on change, see http://www.quirksmode.org/dom/events/change.html Closes #4516 Closes #14667 Closes #14685 BREAKING CHANGE: `input[radio]` and `input[checkbox]` now listen to the "change" event instead of the "click" event. Most apps should not be affected, as "change" is automatically fired by browsers after "click" happens. Two scenarios might need migration: - Custom click events: Before this change, custom click event listeners on radio / checkbox would be called after the input element and `ngModel` had been updated, unless they were specifically registered before the built-in click handlers. After this change, they are called before the input is updated, and can call event.preventDefault() to prevent the input from updating. If an app uses a click event listener that expects ngModel to be updated when it is called, it now needs to register a change event listener instead. - Triggering click events: Conventional trigger functions: The change event might not be fired when the input element is not attached to the document. This can happen in **tests** that compile input elements and trigger click events on them. Depending on the browser (Chrome and Safari) and the trigger method, the change event will not be fired when the input isn't attached to the document. Before: ```js it('should update the model', inject(function($compile, $rootScope) { var inputElm = $compile('<input type="checkbox" ng-model="checkbox" />')($rootScope); inputElm[0].click(); // Or different trigger mechanisms, such as jQuery.trigger() expect($rootScope.checkbox).toBe(true); }); ``` With this patch, `$rootScope.checkbox` might not be true, because the click event hasn't triggered the change event. To make the test, work append the inputElm to the app's `$rootElement`, and the `$rootElement` to the `$document`. After: ```js it('should update the model', inject(function($compile, $rootScope, $rootElement, $document) { var inputElm = $compile('<input type="checkbox" ng-model="checkbox" />')($rootScope); $rootElement.append(inputElm); $document.append($rootElement); inputElm[0].click(); // Or different trigger mechanisms, such as jQuery.trigger() expect($rootScope.checkbox).toBe(true); }); ``` `triggerHandler()`: If you are using this jQuery / jqLite function on the input elements, you don't have to attach the elements to the document, but instead change the triggered event to "change". This is because `triggerHandler(event)` only triggers the exact event when it has been added by jQuery / jqLite.
AngularJS 
AngularJS lets you write client-side web applications as if you had a smarter browser. It lets you use good old HTML (or HAML, Jade/Pug and friends!) as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. It automatically synchronizes data from your UI (view) with your JavaScript objects (model) through 2-way data binding. To help you structure your application better and make it easy to test, AngularJS teaches the browser how to do dependency injection and inversion of control.
It also helps with server-side communication, taming async callbacks with promises and deferred objects, and it makes client-side navigation and deep linking with hashbang urls or HTML5 pushState a piece of cake. Best of all? It makes development fun!
- Web site: https://angularjs.org
- Tutorial: https://docs.angularjs.org/tutorial
- API Docs: https://docs.angularjs.org/api
- Developer Guide: https://docs.angularjs.org/guide
- Contribution guidelines: CONTRIBUTING.md
- Dashboard: https://dashboard.angularjs.org
Looking for the new Angular? Go here: https://github.com/angular/angular
Building AngularJS
Once you have set up your environment, just run:
grunt package
Running tests
To execute all unit tests, use:
grunt test:unit
To execute end-to-end (e2e) tests, use:
grunt package
grunt test:e2e
To learn more about the grunt tasks, run grunt --help
Contribute & Develop
We've set up a separate document for our contribution guidelines.
What to use AngularJS for and when to use it
AngularJS is the next generation framework where each component is designed to work with every other component in an interconnected way like a well-oiled machine. AngularJS is JavaScript MVC made easy and done right. (Well it is not really MVC, read on, to understand what this means.)
MVC, no, MV* done the right way!
MVC, short for Model-View-Controller, is a design pattern, i.e. how the code should be organized and how the different parts of an application separated for proper readability and debugging. Model is the data and the database. View is the user interface and what the user sees. Controller is the main link between Model and View. These are the three pillars of major programming frameworks present on the market today. On the other hand AngularJS works on MV*, short for Model-View-Whatever. The Whatever is AngularJS's way of telling that you may create any kind of linking between the Model and the View here.
Unlike other frameworks in any programming language, where MVC, the three separate components, each one has to be written and then connected by the programmer, AngularJS helps the programmer by asking him/her to just create these and everything else will be taken care of by AngularJS.
Interconnection with HTML at the root level
AngularJS uses HTML to define the user's interface. AngularJS also enables the programmer to write new HTML tags (AngularJS Directives) and increase the readability and understandability of the HTML code. Directives are AngularJS’s way of bringing additional functionality to HTML. Directives achieve this by enabling us to invent our own HTML elements. This also helps in making the code DRY (Don't Repeat Yourself), which means once created, a new directive can be used anywhere within the application.
HTML is also used to determine the wiring of the app. Special attributes in the HTML determine where to load the app, which components or controllers to use for each element, etc. We specify "what" gets loaded, but not "how". This declarative approach greatly simplifies app development in a sort of WYSIWYG way. Rather than spending time on how the program flows and orchestrating the various moving parts, we simply define what we want and AngularJS will take care of the dependencies.
Data Handling made simple
Data and Data Models in AngularJS are plain JavaScript objects and one can add and change properties directly on it and loop over objects and arrays at will.
Two-way Data Binding
One of AngularJS's strongest features. Two-way Data Binding means that if something changes in the
Model, the change gets reflected in the View instantaneously, and the same happens the other way
around. This is also referred to as Reactive Programming, i.e. suppose a = b + c is being
programmed and after this, if the value of b and/or c is changed then the value of a will be
automatically updated to reflect the change. AngularJS uses its "scopes" as a glue between the Model
and View and makes these updates in one available for the other.
Less Written Code and Easily Maintainable Code
Everything in AngularJS is created to enable the programmer to end up writing less code that is easily maintainable and readable by any other new person on the team. Believe it or not, one can write a complete working two-way data binded application in less than 10 lines of code. Try and see for yourself!
Testing Ready
AngularJS has Dependency Injection, i.e. it takes care of providing all the necessary dependencies to its controllers and services whenever required. This helps in making the AngularJS code ready for unit testing by making use of mock dependencies created and injected. This makes AngularJS more modular and easily testable thus in turn helping a team create more robust applications.