angular

What is angular?

Angular is a platform and framework for building single-page client applications using HTML and TypeScript. It implements core and optional functionality as a set of TypeScript libraries that you import into your applications.

What are angular's main functionalities?

Component-based Architecture

Angular uses a component-based architecture where the application is divided into small, reusable components. Each component has its own HTML template, CSS styles, and TypeScript logic.

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `<h1>Hello, {{name}}!</h1>`,
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  name = 'Angular';
}

Two-way Data Binding

Two-way data binding allows for automatic synchronization of data between the model and the view. This means that any changes in the model are reflected in the view and vice versa.

<input [(ngModel)]="name">
<p>Hello, {{name}}!</p>

Dependency Injection

Dependency Injection (DI) is a design pattern used to implement IoC (Inversion of Control). It allows a class to receive its dependencies from an external source rather than creating them itself. Angular's DI system makes it easy to manage dependencies and promote reusability.

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root',
})
export class DataService {
  getData() {
    return ['data1', 'data2', 'data3'];
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-data',
  template: `<ul><li *ngFor="let item of data">{{item}}</li></ul>`
})
export class DataComponent implements OnInit {
  data: string[];
  constructor(private dataService: DataService) {}
  ngOnInit() {
    this.data = this.dataService.getData();
  }
}

Routing

Angular's Router enables navigation from one view to the next as users perform application tasks. It allows for defining routes and associating them with components, enabling deep linking and navigation.

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { AboutComponent } from './about/about.component';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'about', component: AboutComponent }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule {}

// In app.module.ts
import { AppRoutingModule } from './app-routing.module';

@NgModule({
  imports: [AppRoutingModule],
  // other imports
})
export class AppModule {}

Other packages similar to angular

react

React is a JavaScript library for building user interfaces, maintained by Facebook. Unlike Angular, which is a full-fledged framework, React is a library that focuses on the view layer only. It uses a virtual DOM for efficient updates and is often paired with other libraries for state management and routing.

vue

Vue.js is a progressive JavaScript framework for building user interfaces. It is designed to be incrementally adoptable, meaning you can use as much or as little of Vue as you need. Vue is known for its simplicity and ease of integration with other projects and libraries.

svelte

Svelte is a radical new approach to building user interfaces. Whereas traditional frameworks like React and Vue do the bulk of their work in the browser, Svelte shifts that work into a compile step that happens when you build your app. Svelte writes code that updates the DOM when the state of your app changes.

README

packaged angular

This package contains the legacy AngularJS (version 1.x). AngularJS support has officially ended as of January 2022. See what ending support means and read the end of life announcement.

See @angular/core for the actively supported Angular.

Install

You can install this package either with npm or with bower.

npm

npm install angular

Then add a <script> to your index.html:

<script src="/node_modules/angular/angular.js"></script>

Or require('angular') from your code.

bower

bower install angular

Then add a <script> to your index.html:

<script src="/bower_components/angular/angular.js"></script>

Documentation

Documentation is available on the AngularJS docs site.

License

The MIT License

Copyright (c) 2022 Google LLC

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.