Can't bind to 'ngModel' since it isn't a known property of 'input'

angular2在雙向數據綁定時[(ngModel)]無法使用，出現的錯誤是： Can't bind to 'ngModel' since it isn't a known property of 'input'. 解決辦法： 在文件 app.component.ts 中引入ngModel 具體爲： 添加兩行代碼： import { FormsModule } from '@angular/for

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