Custom Validators in Angular

Custom Validators in Angular — a practical guide to Angular custom validators with clear examples you can reuse in real projects.

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Short description

Reuse validators across FormControls.

Custom validator

export const bannedWord: ValidatorFn = (control) => {
  const v = String(control.value || '');
  return v.includes('test') ? { bannedWord: true } : null;
};