Is it better to convert fields extracted from a JSON string to Date objects or moment.js instances when using Angular and moment.js together?

When working on editing a user profile, the API call returns the following data structure:

 export class User {
     username: string;
     email: string;
     creationTime: Date;
     birthDate: Date;
 }

For validating and manipulating the birthDate value in Angular Material DatePicker, what is the best approach to declare it as a model class field? Should I use native Date type with moment.js for date manipulation, or simply use moment.Moment without using Date at all?

As for the creationTime, if it's just for displaying to the user, should it be declared as a string type in the frontend?

Finally, when converting values to and from strings for backend communication, should the conversion happen in the service call to the API (e.g. using a reviver function), or is it better to handle it within the model constructor?

Answer №1

This is the information provided in the official documentation:

How to Set the Chosen Date
The format of dates that the datepicker requires depends on the type of DateAdapter that is used within your application. For instance, the NativeDateAdapter works directly with standard JavaScript Date objects. On the other hand, if you are utilizing the MomentDateAdapter, the values will all be instances of Moment.js. By employing the adapter pattern, the datepicker component can function effectively with any custom DateAdapter and arbitrary date representation. Refer to the guide on Choosing a date implementation for further details.

Depending on the chosen DateAdapter, the datepicker may automatically convert certain date formats for you. Both the NativeDateAdapter and MomentDateAdapter, for example, permit ISO 8601 strings to be inputted into the datepicker and then converted to the appropriate object type automatically. This feature proves beneficial when linking data straight from your backend to the datepicker. Nonetheless, it's important to note that the datepicker won't recognize date strings formatted according to user preference (e.g., "1/2/2017") as this can lead to confusion due to differing interpretations based on the browser's locale.

https://material.angular.io/components/datepicker/overview

If your dates are already in ISO 8601 format, there is no need for additional conversion steps.

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