form-validation

SKILL.md

Form Validation

Table of Contents

Overview

When to Use

Quick Start

Reference Guides

Best Practices

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)

Reference Guides

Detailed implementations in the references/ directory:

Guide
Contents

React Hook Form with TypeScript
React Hook Form with TypeScript

Formik with Yup Validation
Formik with Yup Validation

Vue Vee-Validate
Vue Vee-Validate

Custom Validator Hook
Custom Validator Hook

Server-Side Validation Integration
Server-Side Validation Integration

Best Practices

✅ DO

Follow established patterns and conventions

Write clean, maintainable code

Add appropriate documentation

Test thoroughly before deploying

❌ DON'T

Skip testing or validation

Ignore error handling

Hard-code configuration values

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