What state flags does FormControl have?

FormControl in Angular has several important state flags that help understand the current state of a form field:

• valid / invalid — whether the field is valid according to the set validators.
• pristine / dirty — whether the field has been changed by the user (pristine — no changes, dirty — has changes).
• touched / untouched — whether the field has been focused and then blurred (touched — has been, untouched — not).
• pending — asynchronous validation is in progress.

Example usage:

const control = new FormControl('');
console.log(control.pristine); // true
control.setValue('test');
console.log(control.dirty); // true

These flags are often used for displaying errors and managing form behavior.