Tips for formatting a Date field within an Angular application

After receiving a stringVariable from the backend service, I successfully converted it into a Date field with the following code snippet. 

date d = new Date(stringVariable );

While this conversion worked fine, the resulting date format is not what I require:

Thu Jun 29 2017 20:00:00 GMT-0400 (Eastern Daylight Time)

I need to change this format to yyyy-mm-dd while keeping the variable 'd' as a Date type rather than converting it to a String.

If I try using date pipe transform method or .toLocaleString, it will inadvertently convert the final output of 'd' to a string, which is not desired.

Any assistance from experts would be greatly appreciated.

angulartypescript

Answer №1

The format of the Date object cannot be changed.

To address your issue, you can utilize the date pipe in Angular on your template/html. This will not alter the value of d, but instead transform it into the desired yyyy-mm-dd format. The original value of d in your component.ts will remain as a Date Object, allowing you to use it in other parts of your component. You can find a list of accepted formats for the date pipe here.

<input [ngModel]="d  | date:'yyyy-MM-dd'"/>

You can view a demo here.

UPDATE: If you are using PrimeNg's p-calendar component, you can also utilize the dateFormat property which achieves similar results as the aforementioned pipe.

<p-calendar [(ngModel)]="d" dateFormat="yy-MM-dd"></p-calendar>

Here is a demo. In this demo, I have set up the onSelect event to display the updated d whenever a new date is selected.

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