【angular】Can't bind to 'ngModel' since it isn't a known property of 'select'.

      最近做前端的時候，經常會遇到Can't bind to '...' since it isn't a known property of '...',比如今天想在<select/>上加一個雙向綁定，就提示Can't bind to 'ngModel' since it isn't a known property of 'select'. 出現這個問題的原因就是沒有用，所以需要先在module添加引用

import { FormsModule, ReactiveFormsModule } from '@angular/forms';

@NgModule({
  imports: [
    FormsModule
  ]
})

       這樣就OK啦。

       像剛剛在使用p-growl時又遇到的類似的問題：Can't bind to 'value' since it isn't a known property of 'p-growl'

         同樣添加引用並聲明就可以了：

import { GrowlModule } from 'primeng/primeng';

imports [GrowlModule]

         出現這個問題主要是需要添加相應的引用，具體是什麼引用，就需要判斷一下了。