The components inside of your container components can easily accept Observables. You simply define your custom @Input then use the Async pipe when you pass the Observable in. This lesson walks you through the process of passing an Observable into a…

Angular 2 templates use a special Async pipe to be able to render out Observables. This lesson covers the syntax used to create an Observable in Angular 2 and then to render it out in the template. import {Component} from 'angular2/core'; import {boo…

@Input allows you to pass data into your controller and templates through html and defining custom properties. This allows you to easily reuse components, such as item renderers, and have them display different values for each instance of the rendere…

Besides @Input(), we can also use properties on the @Component, to pass the data. import {Component, View, NgFor, Input} from 'angular2/angular2'; @Component({ selector: 'reddit-article' }) @View({ directives: [], template: ` <article> <div class…

Angular allows us to conveniently use the async pipe to automatically register to RxJS observables and render the result into the template once the request succeeds. This has some drawbacks, especially if we want to bind the same data in multiple par…

Each time you use the Async Pipe, you create a new subscription to the stream in the template. This can cause undesired behavior especially when network requests are involved. This lesson shows how to use a BehaviorSubject to observe the http stream…

Angular 2 allows you to pass values from inputs simply by referencing them in the template and passing them into your Subject.next() call. This lesson shows you how to make a number input and pass the value so you can configure how much you want the…

Angular 2’s ActivatedRoute allows you to get the details of the current route into your components. Params on the ActivatedRoute are provided as streams, so you can easily map the param you want off of the stream and display it in your template. For…

我使用 angular-cli 来搭建项目. ng new infinite-scroller-poc --style=scss 项目生成好后,进入 infinite-scroller-poc 目录下. Angular CLI 提供了一堆命令用来生成组件.指令.服务和模块. 我们来生成一个服务和一个指令. ng g service hacker-news ng g directive infinite-scroller 注意: Angular CLI 会自动在 app.module.ts 里注册…

The network may be unreliable and loading data may take time. Thus it is important to give the user some feedback about what's going on as fast as possible. In this lesson we learn how to leverage the else block of the *ngIf directive to show a simpl…