AngularReact系统。 基于Vue Composition API。 :memo: :high_voltage: :star: 笔记 寻找先前的(9.0.x)文件吗? 。 @ Component ( { selector : "app-root" , inputs : [ "count" ] , outputs : [ "countChange" ] } ) export class AppComponent extends defineComponent ( ( ) => { const count = ref ( 0 ) const countChange = new EventEmitter ( ) function increment ( ) { count . value += 1 } watchEffect