angular.js README

The project's README from github.com/angular/angular.js. As one markdown file: README.md.

AngularJS CircleCI

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!

AngularJS support has officially ended as of January 2022. See what ending support means and read the end of life announcement.

Visit angular.io for the actively supported Angular.

Documentation

Go to https://docs.angularjs.org

Contribute

We've set up a separate document for our contribution guidelines.

Develop

We've set up a separate document for developers.

Analytics

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.

angular.js (angular/angular.js)

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Angular.js
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What is this?AngularJS is a JavaScript framework for client-side web apps that makes the browser smarter: HTML is your template language, extended with extra syntax to describe app components clearly.
Is it a framework I build the whole app on, or a helper library?A framework: its components are designed to work with every other component in an interconnected way, so it structures the entire application rather than offering utilities you pick individually.
What would I need installed to poke at the source code?To work with the repository itself you need Node.js 12.14.1 or newer, plus Yarn and grunt-cli; the i18n test suites run under Jasmine.
Is this still the Angular to use for a new project?No — official support ended in January 2022 and the repository is now archived; the actively supported successor lives at angular.io.
Does it matter which OS or server stack I run it on?Not really — it is purely client-side: the framework runs in the visitor’s browser and plain HTML defines the interface, so there is no server runtime and no OS requirement.
How does the two-way data binding work?A change in the model shows up in the view instantaneously and the other way around; ‘scopes’ act as the glue that relays updates between model and view.
What are directives for?They let you invent your own HTML elements and attributes that carry extra functionality, making markup more readable — and once written, a directive can be reused anywhere in the app to keep code DRY.
Why does it call its approach Model-View-Whatever?In classic MVC you write the model, view and controller and then wire them together yourself; here you just create the model and the view, and everything else is taken care of by AngularJS.
What does it give me for talking to a server and page navigation?It tames async callbacks with promises and deferred objects for server-side communication, and it supports client-side navigation and deep linking via hashbang URLs or HTML5 pushState.
What are similar projects?framework, ui-router, alpine, ember.js, single-spa, solid, angular-seed, react-router
Which topics is it in?angularjs, client-side, mvc, javascript-framework, reactive-programming, spa, single-page-app, dependency-injection, declarative, routing, templates, unit-testing
Creator
angular
Size
99.4 MB
Stars
58.5K
Updated
CommitApr 12
Age
16y
Commits · 90 Days