How to format a date in ngModel using Angular 9 and above

Is there a way to format the date displayed in my input using ngModel to follow a specific format like 'MM/dd/YYYY'? Can this be achieved by using ngModel? For example, could we do something like

model[(ngModel)]="data.targetDate  | date:'MM/dd/YYYY' "
? Is this even possible?

Alternatively, is it possible to format the date by calling a method from ngModel like:

[ngModel]="formatDate(data.targetDate)"

Thank you for any help and ideas.

#html code

<input [ngModel]="data.targetDate" [matDatepicker]="pickerTargetDate">

Answer №1

After reviewing the documentation and implementing date pipes in our project, it appears that a date pipe cannot be directly used within an HTML input element; instead, it should be utilized within the template itself.

An alternative approach is to import the date pipe into the component and utilize its transform method to manipulate the value of your model, as shown below:

var datePipe = new DatePipe();
data.targetDate = datePipe.transform(userdate, 'MM/DD/YYYY');

It's worth noting that despite the potential success of this method, concerns arise regarding the compatibility with the spec requirement for date inputs to follow the format yyyy-mm-dd. Nevertheless, browsers may still render dates appropriately even if there are discrepancies.

To demonstrate this process, refer to the following stackblitz example:

If you implement the following code snippet in the Angular component:

import { DatePipe } from '@angular/common';
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent implements OnInit {
  myDate = new Date();
  dateString: string;

  ngOnInit() {
    let datePipe = new DatePipe('en-US');
    this.dateString = datePipe.transform(new Date(), 'yyyy-MM-dd');

    console.log('Date string: ', this.dateString);
  }
}

The corresponding HTML will consist of a simple input element:

<input [ngModel]='dateString'>

This implementation confirms that the transform method must adhere to a specific structure when executed programmatically. Additionally, remember that the transform function returns a string representation rather than a date object.

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