Angular 2 + Ionic 2:检测对象是否被修改 [英] Angular 2 + Ionic 2: Detect if an object was modified
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问题描述
问) 如果我有一个具有大量属性的对象,所有属性都绑定到表单中的字段,我如何在对象发生更改时进行捕获?
我不想在每个字段上放置 (blur)
事件,因为页面已经很重了,这可能会导致页面上的听众太多.
I don't want to put (blur)
events on every field as the page is quite heavy already and this could lead to way too many listeners on the page.
例如
对象:
var person = {
name: string,
email: string,
phone: string
};
表格:
<input [(ngModel)]="person.name" type="text" />
<input [(ngModel)]="person.email" type="text" />
<input [(ngModel)]="person.phone" type="text" />
推荐答案
您可以使用表单对象并检查表单是否已更改.
you can use a form object and check if the form has changed.
我知道最新版本的 Angular2 和 Ionic2 与新的 Forms 模块存在一些问题,但这是我的建议.
I know that there have been some issues with latest release of Angular2 and Ionic2 with the new Forms module, but that would be my suggestion.
https://angular.io/docs/ts/latest/guide/表单.html
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