Form validation

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