import { FormsModule } from '@angular/forms'; @NgModule({ declarations: [ AppComponent, PagesComponent ], imports: [ BrowserModule, FormsModule<=新增 ], providers: [], bootstrap: [AppComponent] })2.在app.component.ts新增一個屬性
export class AppComponent { text; }3.在app.component.html新增雙向繫結[(ngModel)="xxx"]
<div> <input type="text" [(ngModel)]="text"> <span> 您輸入: {{text}}</span> <span> 字數: {{ text.length}} </span> </div>以上內容若有不足或侵權請告知將立即處理