Custom Validators
Explore how to create custom validators in Angular by generating classes and implementing the Validator interface. Understand handling validation for multiple form controls, including password matching, to ensure accurate user input checks.
We'll cover the following...
It’s time to get to the heart of this section, which is writing custom validators. In some cases, you’ll want to create a validator when the validators that come bundled with Angular won’t suffice.
The validator we’ll be creating will check if the passwords from both input fields match. This will be a challenge because validators are typically applied to a single input. We’ll look at how we can use a validator on multiple inputs at the same time.
Here is an overview of the steps we’ll go through to accomplish this:
- Generate a class for the validator
- Implement the
Validatorinterface on the class - Define a
validatemethod in the class - Return either
nullor an object with the error
We’ll talk more ...