`[[(ngModel)]`vs`[[value)]` [英] `[(ngModel)]` vs `[(value)]`

问题描述

两者之间有什么区别

<input [(ngModel)]="name">

和

<input [(value)]="name">

他们似乎在做同样的事情.

They appear to do the same thing.

Angular文档使用的是 NgModel ，但他们还说他们用盒装香蕉" [()]替换了所有angular1指令.那么为什么 NgModel 仍然存在?

The angular docs are using NgModel but they also say that they replace all the angular1 directives with the "boxed banana" [()]. So why is NgModel still around?

我想念什么?

推荐答案

• ngModel是一条指令，允许您的输入参与表单(但也可以在没有表单的情况下使用)
• value是一个属性，您可以使用[value]="name"将值绑定到该属性，而(valueChange)="..."不起作用，因为<input>元素没有@Output() valueChange;，因此[(value)]="..."无效./li>
  • ngModel is a directive that allows your input to participate in a form (but works also without a form)
  • value is a property you can bind a value to with [value]="name" while (valueChange)="..." doesn't work, because the <input> element doesn't have an @Output() valueChange; therefore [(value)]="..." is invalid.

  [(ngModel)]="name"是[ngModel]="name" (ngModelChange)="name = $event"的简写，[(value)]="name"是[value]="name" (valueChange)="name = $event"

  这篇关于`[[(ngModel)]`vs`[[value)]`的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！