如何在Angular 2的组件之间共享数据？

在父组件模板中：

<hero-child [hero]="hero">
</hero-child>

在子组件中：

@Input() hero: Hero;

资料来源：https : //angular.io/docs/ts/latest/cookbook/component-communication.html

视情况是否简单而定

a) A -> B -> C A has two child B and C and if you want to share data between A and B or A and C then use (input / output)

If you want to share between B and C then also you can use (input / output) but it is suggested to use Service.

b) If the tree is big and complex. (if there are so many levels of parent and children connections.) And in this case if you want to share data then I would suggest ngrx

It implements the flux architecture which creates a client side store to which any component can subscribe and can update without creating any race condition.