Angular 2更改事件-模型更改 [英] Angular 2 change event - model changes

问题描述

更改模型后如何获取值? (change)事件确实在模型更改之前触发.我不想使用event.target.value

How can I get the values after a model has changed? The (change) event does fire before the model change. I do not want to use event.target.value

<input type="checkbox"  (change)="mychange(event)" [(ngModel)]="mymodel">

public mychange(event)
{
   console.log(mymodel); // mymodel has the value before the change
}

推荐答案

<罢工> 这是一个已知问题.当前，您必须使用问题中所示的解决方法.

That's a known issue. Currently you have to use a workaround like shown in your question.

这正在按预期方式工作.发出更改事件ngModelChange([(ngModel)]的(...)部分尚未更新绑定模型:

This is working as intended. When the change event is emitted ngModelChange (the (...) part of [(ngModel)] hasn't updated the bound model yet:

<input type="checkbox"  (ngModelChange)="myModel=$event" [ngModel]="mymodel">

另请参见

• https://github.com/angular/angular/issues/3406 ，
• https://github.com/angular/angular/issues/6311

• https://github.com/angular/angular/issues/3406,
• https://github.com/angular/angular/issues/6311

这篇关于Angular 2更改事件-模型更改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！