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Form Validation Library

$19

React Hook Form + Zod validation patterns, multi-step forms, file uploads, and accessible error handling.

📁 20 files

MarkdownTypeScriptReact

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📁 File Structure 20 files

form-validation-library/ ├── LICENSE ├── README.md ├── examples/ │ ├── checkout-form.tsx │ ├── file-upload-form.tsx │ └── registration-form.tsx ├── free-sample.zip ├── guide/ │ └── validation-patterns.md ├── guides/ │ └── validation-patterns.md ├── index.html ├── src/ │ ├── components/ │ │ ├── FileUpload.tsx │ │ ├── FormField.tsx │ │ └── MultiStepWizard.tsx │ ├── hooks/ │ │ ├── useFileUpload.ts │ │ ├── useFormPersist.ts │ │ └── useMultiStepForm.ts │ ├── schemas/ │ │ ├── async-validation.ts │ │ ├── payment-schemas.ts │ │ └── user-schemas.ts │ └── utils/ │ └── validation-helpers.ts └── tests/ └── schemas.test.ts

📖 Documentation Preview README excerpt

Form Validation Library

A complete React form validation toolkit built on React Hook Form and Zod. Includes reusable form components, pre-built validation schemas for common use cases, custom hooks for multi-step forms and file uploads, and patterns you can drop into any project.

What's Inside


form-validation-library/
├── src/
│   ├── components/         # Reusable form field components
│   │   ├── FormField.tsx          # Generic field wrapper with error display
│   │   ├── FileUpload.tsx         # Drag-and-drop file upload with validation
│   │   └── MultiStepWizard.tsx    # Multi-step form with progress and navigation
│   ├── schemas/            # Pre-built Zod validation schemas
│   │   ├── user-schemas.ts        # Registration, profile, login schemas
│   │   ├── payment-schemas.ts     # Payment, billing, subscription schemas
│   │   └── async-validation.ts    # Server-side uniqueness checks, debounced validation
│   ├── hooks/              # Custom form hooks
│   │   ├── useMultiStepForm.ts    # Step navigation, per-step validation
│   │   ├── useFileUpload.ts       # File selection, preview, upload progress
│   │   └── useFormPersist.ts      # Save/restore form state to localStorage
│   └── utils/
│       └── validation-helpers.ts  # Reusable Zod refinements and transforms
├── tests/
│   ├── schemas.test.ts            # Schema validation test suite
│   ├── components.test.tsx        # Component rendering and interaction tests
│   └── hooks.test.ts              # Hook behavior tests
├── examples/
│   ├── registration-form.tsx      # Complete signup form example
│   ├── checkout-form.tsx          # E-commerce checkout with address + payment
│   └── file-upload-form.tsx       # File upload with preview and validation
├── guides/
│   └── validation-patterns.md     # Decision guide for validation strategies
├── README.md
└── LICENSE

Quick Start

1. Install dependencies


npm install react-hook-form zod @hookform/resolvers

2. Create a validated form in 30 seconds


import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { loginSchema, type LoginData } from "./src/schemas/user-schemas";
import { FormField } from "./src/components/FormField";

function LoginForm() {
  const {
    register,
    handleSubmit,
    formState: { errors, isSubmitting },
  } = useForm<LoginData>({
    resolver: zodResolver(loginSchema),

*... continues with setup instructions, usage examples, and more.*

📄 Code Sample .tsx preview

examples/checkout-form.tsx// ============================================================================ // Checkout Form Example — Multi-Step with Address + Payment // ============================================================================ // // Demonstrates: // - Multi-step form with useMultiStepForm hook // - Per-step validation (validate shipping before payment) // - Credit card validation with Luhn check // - Conditional fields (shipping address = billing address toggle) // - Card brand detection // - Order summary // // ============================================================================ import React, { useCallback } from "react"; import { useForm } from "react-hook-form"; import { zodResolver } from "@hookform/resolvers/zod"; import { addressSchema, creditCardSchema, type AddressData, type CreditCardData } from "../src/schemas/payment-schemas"; import { detectCardBrand } from "../src/utils/validation-helpers"; import { FormField, FormFieldGroup } from "../src/components/FormField"; import { useMultiStepForm } from "../src/hooks/useMultiStepForm"; // --------------------------------------------------------------------------- // Step 1: Shipping Address // --------------------------------------------------------------------------- function ShippingStep({ form, }: { form: ReturnType<typeof useForm<AddressData>>; }) { const { register, formState: { errors } } = form; return ( <FormFieldGroup legend="Shipping Address"> <FormField label="Street Address" error={errors.streetAddress?.message} required> <input type="text" {...register("streetAddress")} className="w-full px-3 py-2 border rounded-lg" autoComplete="street-address" /> </FormField> <FormField label="Apartment / Suite" error={errors.apartment?.message}>

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