Angular2：如何使用带有NgModel双向绑定的JavaScript Date Object [英] Angular2: How to use JavaScript Date Object with NgModel two way binding

问题描述

我正在使用Angular 2，我有这个代码：

I'm working with Angular 2 and I have this code:

JS，此代码启动模板的employee-variable：

JS, this code initiates the employee-variable for the template:

handleEmployee(employee : Employee){
        this.employee = employee;
        this.employee.startDate = new Date('2005/01/01');
        console.log(this.employee);
    }

模板：

...
<div>
    <label>Start date: </label>
    <input [(ngModel)]="employee.startDate" type="date" name="startDate"/>
  </div>
  <div>
...

正确显示firstname等其他数据。但是我得到的日期是：

Other data like firstname is displayed correctly. But for the date I just get:

mm/dd/yyyy

在输入元素中，应该是日期。

In the input element, which should be a date.

我该怎么做？

推荐答案

更新：

当我将此答案写成 DatePipe 不存在，现在你可以这样做

UPDATE:

when I wrote this answer DatePipe did not exist, now you can just do this

<input [ngModel]="startDate | date:'yyyy-MM-dd'" (ngModelChange)="startDate = $event" type="date" name="startDate"/>

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PLUNKER

你需要转换日期对象在输入type =date格式， yyyy-mm- dd ，这就是它的工作原理

You need to convert date object in the input type="date" format which is yyyy-mm-dd, this is how it will work

模板：

<input [(ngModel)]="humanDate" type="date" name="startDate"/>

组件（TS）：

export class App {
  startDate: any;

  constructor() {
    this.startDate = new Date(2005, 1, 4);
  }

  set humanDate(e){
    e = e.split('-');
    let d = new Date(Date.UTC(e[0], e[1]-1, e[2]));
    this.startDate.setFullYear(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate());
  }

  get humanDate(){
    return this.startDate.toISOString().substring(0, 10);
  }
}

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