What are Angular async validators and how do I use them?
An example of an AI chatbot conversation about Angular async validators in reactive forms.
What are Angular async validators and how do I use them?
Angular async validators are functions that return an observable, allowing you to perform asynchronous validation on form controls.
Can you give me an example of how to implement an async validator?
Sure! You can create an async validator that checks if a username is already taken by making an HTTP request to your server.
How do I attach this async validator to a form control?
You can attach it by using the asyncValidators property when creating the form control in your reactive form.
What happens if the async validation fails?
If the async validation fails, the form control will be marked as invalid, and you can display an error message accordingly.
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