How do I use async validators in my form validation?

How do I use async validators in my form validation?

Async validators are functions that return a promise. They are useful for validating data that requires a server check, like email uniqueness.

Can you give me an example of an async validator?

Sure! Here's a simple example: you can create an async validator that checks if an email is already registered by sending a request to your server.

How do I implement this in Angular?

In Angular, you can use the AsyncValidatorFn interface to create your async validator and attach it to your form controls.

What if I want to validate multiple fields asynchronously?

You can combine multiple async validators using the Validators.composeAsync method to validate multiple fields at once.