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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 .ts preview

src/hooks/useFileUpload.ts // ============================================================================ // useFileUpload Hook — File Selection, Preview, and Upload // ============================================================================ // // Encapsulates the file upload lifecycle: // 1. File selection (from input or drag-and-drop) // 2. Client-side validation (size, type) // 3. Preview generation (for images) // 4. Upload to server with progress tracking // 5. Error handling and retry // // ============================================================================ import { useState, useCallback, useRef, useEffect } from "react"; export interface UploadedFile { file: File; preview: string | null; status: "pending" | "uploading" | "success" | "error"; progress: number; // 0-100 error?: string; /** Server response after successful upload */ response?: unknown; } export interface UseFileUploadOptions { /** Accepted MIME types */ accept?: string[]; /** Maximum file size in bytes (default: 10MB) */ maxSize?: number; /** Allow multiple files (default: false) */ multiple?: boolean; /** Maximum number of files (default: 5) */ maxFiles?: number; /** Upload function — called for each file */ uploadFn?: ( file: File, onProgress: (percent: number) => void, signal: AbortSignal ) => Promise<unknown>; /** Auto-upload files immediately after selection (default: false) */ autoUpload?: boolean; } export interface UseFileUploadReturn { /** Currently selected/uploaded files */ files: UploadedFile[]; /** Whether any file is currently uploading */ isUploading: boolean; /** Add files (from an input change or drop event) */ # ... 251 more lines ...

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