Angular Validator functions - Async and Sync Validators

What are the Validator functions?

There are two types of validator functions which are the following -

1. Async validators

2. Sync validators

Async validator functions that take a control instance and return an observable that later emits a set of validation errors or null.

Sync validator functions that take a control instance and return a set of validation errors or null.

Angular runs only Async validators due to some performance issues.

For more detail kindly refer the link https://www.code-sample.com/2018/05/angular-6-7-documentation-and-examples.html

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