Angular's Built-in Form Validators
Angular's built-in validators are pre-made rules for your forms. Use them to easily check for required fields, min/max length, and valid email formats. The footgun is confusing `required` for text inputs with `requiredTrue`, which is only for checkboxes.
Think of Angular's built-in validators as a toolbox of ready-to-use functions for common form checks, saving you from writing boilerplate. They are used with a `FormControl` to enforce rules like `min`/`max` for numbers, `minLength`/`maxLength` for strings, and `email` for format. The main footgun is confusing `required`, which checks for any non-empty value, with `requiredTrue`, which specifically validates that a checkbox is checked. Using the wrong one can lead to unexpected validation failures or passes.
Read the original → angular.dev
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