Form Validation

This covers client-side form validation across React Hook Form, Formik, and Vue's Vee-Validate, plus custom validator patterns. You get TypeScript-safe implementations for common scenarios like login and registration forms, real-time error feedback, and multi-step flows. The reference guides walk through each library's approach, which is helpful if you're jumping between frameworks or haven't settled on a validation strategy yet. The server-side validation integration guide is the most useful part since that's where most forms get messy. Solid for teams that need consistent validation patterns across different projects, though you'll still need to adapt the examples to your specific backend and error handling setup.

skills.sh installs: 503
GitHub stars: 379
last updated: Aug 21, 2026

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Install

$ npx -y skills add aj-geddes/useful-ai-prompts --skill form-validation --agent claude-code

Installs into .claude/skills of the current project.

Files

Overview

Implement comprehensive form validation including client-side validation, server-side synchronization, and real-time error feedback with TypeScript type safety.

When to Use

User input validation
Form submission handling
Real-time error feedback
Complex validation rules
Multi-step forms

Quick Start

Minimal working example:

// types/form.ts
export interface LoginFormData {
  email: string;
  password: string;
  rememberMe: boolean;
}

export interface RegisterFormData {
  email: string;
  password: string;
  confirmPassword: string;
  name: string;
  terms: boolean;
}

// components/LoginForm.tsx
import { useForm, SubmitHandler } from 'react-hook-form';
import { LoginFormData } from '../types/form';

const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

export const LoginForm: React.FC = () => {
  const {
    register,
    handleSubmit,
// ... (see reference guides for full implementation)