Laravel Client Validation

A powerful validation package that brings Laravel validation rules to the client-side. Validate forms in real-time using the same rules you know from Laravel — works with any backend or as a standalone NPM package.

Features

• 104 client-side rules — Comprehensive coverage of Laravel validation rules
• 5 remote rules — Server-side AJAX validation for unique, exists, etc.
• TypeScript declarations — Full type definitions for IDE autocompletion
• Laravel 12/13 support — Compatible with the latest Laravel versions
• Livewire v3 & v4 — Automatic version detection and optimized integration
• Filament v3 & v5 — Panel plugin with field-level validation
• Backend-agnostic — Use with Laravel, Django, Express, Rails, or any backend
• Multiple integrations — Alpine.js, Livewire, Filament, Vanilla JS, React, Vue
• Real-time validation — Instant feedback on blur, input, or submit
• FormRequest support — Extract rules from existing Laravel FormRequest classes
• Validation hooks — beforeValidate, afterValidate, field-level events
• Bail support — Stop on first failure per field with bail rule
• Batch validation — Validate multiple fields in a single AJAX request
• Rate limiting — Built-in request throttling for AJAX validation
• Zero configuration — Works out of the box with sensible defaults
• Tree-shakeable — ES module subpath exports for minimal bundle size

Quick Start

Option A: Laravel Package (Composer)

composer require mrpunyapal/laravel-client-validation
php artisan client-validation:install

Option B: Standalone NPM Package

npm install laravel-client-validation

Import only what you need:

// Core engine only (no framework dependency)
import { LaravelValidator, RuleRegistry } from 'laravel-client-validation/core';

// Alpine.js adapter
import { createAlpineValidator } from 'laravel-client-validation/alpine';

// Vanilla JS adapter
import { createFormValidator } from 'laravel-client-validation/vanilla';

Option C: CDN / Script Tag

<script src="https://unpkg.com/laravel-client-validation/resources/js/dist/client-validation.iife.js"></script>
<script>
  const validator = new LaravelClientValidation.Validator({
    rules: { email: 'required|email' }
  });
</script>

Usage with Alpine.js

Simple Field Validation

{{-- Validate on blur (default) --}}
<input x-validate="'required|email'" name="email">

{{-- Validate as you type --}}
<input x-validate.live="'required|min:3'" name="username">

{{-- Validate on form submit only --}}
<input x-validate.submit="'required|min:8'" name="password">

{{-- Bail on first failure --}}
<input x-validate="'bail|required|email|unique:users'" name="email">

Complete Form Component

<div x-data="validation({
    rules: {
        email: 'required|email',
        password: 'required|min:8',
        password_confirmation: 'required|same:password'
    },
    messages: {
        'email.required': 'Please enter your email',
        'password.min': 'Password is too short'
    }
})">
    <form @submit.prevent="submit(async (data) => {
        console.log('Valid!', data);
    })">
        <input x-model="form.email" @blur="validate('email')">
        <span x-text="error('email')" x-show="hasError('email')"></span>

        <input type="password" x-model="form.password" @blur="validate('password')">
        <span x-text="error('password')" x-show="hasError('password')"></span>

        <input type="password" x-model="form.password_confirmation">

        <button :disabled="validating || !isValid()">Submit</button>
    </form>
</div>

Available Methods in validation() Component

Usage with Livewire

Supports both Livewire v3 and v4. Version is detected automatically.

Using the x-wire-validate Directive

<div wire:id="my-component">
    <form wire:submit="save">
        <input type="email"
               wire:model="email"
               x-wire-validate="'required|email'"
               name="email">
        <span class="validation-error" data-error="email"></span>

        {{-- Livewire v4: use wire:model.live for real-time sync --}}
        <input type="text"
               wire:model.live="username"
               x-wire-validate.live="'required|alpha_dash|min:3'"
               name="username">
        <span class="validation-error" data-error="username"></span>

        <button type="submit">Submit</button>
    </form>
</div>

Using the PHP Trait

use Livewire\Component;
use MrPunyapal\ClientValidation\Livewire\WithClientValidation;

class CreateUser extends Component
{
    use WithClientValidation;

    public string $name = '';
    public string $email = '';
    public string $password = '';
    public string $password_confirmation = '';

    protected $rules = [
        'name' => 'required|string|min:2|max:50',
        'email' => 'required|email',
        'password' => 'required|min:8|confirmed',
    ];

    protected $messages = [
        'email.required' => 'Please enter your email address',
        'password.confirmed' => 'Passwords do not match',
    ];

    public function render()
    {
        return view('livewire.create-user');
    }
}

In your Blade view:

<div x-data="{ clientRules: @json($this->getClientRules()) }">
    <input wire:model="email"
           x-wire-validate="clientRules.email"
           name="email">
</div>

Livewire Events

protected $listeners = [
    'client-validation-error' => 'handleClientError',
    'client-validation-cleared' => 'handleClientCleared',
];

public function handleClientError($data)
{
    // $data = ['field' => 'email', 'errors' => ['The email field is required.']]
}

Usage with Filament

Register the Plugin

use MrPunyapal\ClientValidation\Filament\ClientValidationPlugin;

class AdminPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            ->plugins([
                ClientValidationPlugin::make()
                    ->enableRemoteValidation()
                    ->validationMode('live'),
            ]);
    }
}

Add Validation to Fields

Use the HasClientValidation trait on your custom Filament fields:

use Filament\Forms\Components\Field;
use MrPunyapal\ClientValidation\Filament\HasClientValidation;

class MyField extends Field
{
    use HasClientValidation;
}

Or use the pre-built ClientValidatedField:

use MrPunyapal\ClientValidation\Filament\ClientValidatedField;

ClientValidatedField::make('email')
    ->clientValidation('required|email')
    ->clientValidationMode('live');

Usage with Vanilla JS (No Framework)

Using Data Attributes

<form data-validate>
    <input name="email"
           data-rules="required|email"
           data-validate-on="blur">

    <input name="username"
           data-rules="required|alpha_dash|min:3"
           data-validate-on="input">

    <button type="submit">Submit</button>
</form>

Programmatic Validation

import { LaravelValidator } from 'laravel-client-validation/core';

const validator = new LaravelValidator({
    rules: {
        email: 'required|email',
        password: 'required|min:8'
    },
    messages: {
        'email.required': 'Email is required'
    }
});

const result = await validator.validateField('email', 'test@example.com');
console.log(result.valid, result.errors);

const formResult = await validator.validateAll({
    email: 'test@example.com',
    password: '12345678'
});

Using Blade Directives

<form data-validate>
    <input name="email" @rules('email', 'required|email', ['mode' => 'blur'])>
    <input name="username" @validateLive('username', 'required|min:3')>
    <input name="password" @validateBlur('password', 'required|min:8')>
</form>

Using with FormRequest

In Controller

use MrPunyapal\ClientValidation\Facades\ClientValidation;

public function create()
{
    $validation = ClientValidation::fromRequest(CreateUserRequest::class);
    return view('users.create', compact('validation'));
}

In Blade

<div x-data="validation(@json($validation))">
    {{-- Form fields --}}
</div>

Backend-Agnostic Remote Validation

The RemoteValidator works with any backend, not just Laravel. Configure it for your stack:

Express.js / Node

import { RemoteValidator } from 'laravel-client-validation/core';

const remote = new RemoteValidator({
    endpoint: '/api/validate',
    csrf: false,
    requestFormatter: (field, value, rule, params) => ({
        field_name: field,
        field_value: value,
        validation_rule: rule,
        rule_params: params
    }),
    responseParser: (response) => ({
        valid: response.success,
        message: response.error || null
    })
});

Django

const remote = new RemoteValidator({
    endpoint: '/validate/',
    csrfHeaderName: 'X-CSRFToken',
    csrfTokenResolver: () => document.cookie.match(/csrftoken=([^;]+)/)?.[1]
});

Custom Adapter

const remote = new RemoteValidator();
remote.setAdapter(async (field, value, rule, params) => {
    const res = await myHttpClient.post('/validate', { field, value, rule });
    return { valid: res.ok, message: res.error };
});

Validation Rules

Client-Side Rules (104 — Instant)

Core: required, nullable, filled, present, bail

String: string, email, url, active_url, alpha, alpha:ascii, alpha_num, alpha_num:ascii, alpha_dash, alpha_dash:ascii, regex, not_regex, contains, doesnt_contain, lowercase, uppercase, starts_with, ends_with, doesnt_start_with, doesnt_end_with, ascii, uuid, uuid:version, ulid, json, hex_color

Numeric: numeric, numeric:strict, integer, integer:strict, decimal, multiple_of, digits, digits_between, min_digits, max_digits

Size: min, max, between, size

Comparison: confirmed, confirmed:field, same, different, gt, gte, lt, lte, in, not_in, enum

Date: date, after, before, after_or_equal, before_or_equal, date_equals, date_format, timezone

Conditional: required_if, required_unless, required_with, required_without, required_with_all, required_without_all, required_if_accepted, required_if_declined, required_array_keys

Presence / Missing: present_if, present_unless, present_with, present_with_all, missing, missing_if, missing_unless, missing_with, missing_with_all

Prohibition: prohibited, prohibited_if, prohibited_unless, prohibited_if_accepted, prohibited_if_declined, prohibits

Boolean: boolean, boolean:strict, accepted, accepted_if, declined, declined_if

Network: ip, ipv4, ipv6, mac_address

Array: array, distinct, in_array, in_array_keys, list

File: file, image, mimes, mimetypes, extensions, dimensions

Advanced: any_of, password_strength

Remote Rules (5 — AJAX)

unique, exists, password, current_password, encoding

<input x-validate.live="'required|email|unique:users,email'" name="email">

See docs/md/validation-rules.md for the canonical validation rules guide and examples.

Configuration

php artisan vendor:publish --tag=client-validation-config

Key options:

return [
    'validation_mode' => 'blur',        // 'blur', 'input', 'submit'
    'debounce_ms' => 300,               // Debounce for live validation
    'enable_ajax_validation' => true,   // Enable AJAX for remote rules
    'rate_limit' => [
        'max_attempts' => 60,           // Requests per window (0 = disabled)
        'decay_seconds' => 60,          // Window duration
    ],
    'error_template' => [
        'container_class' => 'text-red-500 text-sm mt-1',
    ],
    'field_styling' => [
        'valid_class' => 'border-green-500',
        'invalid_class' => 'border-red-500',
    ],
];

Validation Hooks

const validator = new LaravelClientValidation.Validator({ rules });

validator
    .beforeValidate(({ data }) => console.log('Starting...'))
    .afterValidate(({ valid, errors }) => console.log('Done!', valid));

Custom Rules

Client-Side

LaravelClientValidation.extend('phone', (value, params, field, context) => {
    if (!value) return true;
    return /^\+?[\d\s-]{10,}$/.test(value);
}, 'The :attribute must be a valid phone number.');

<input x-validate="'required|phone'" name="phone">

Server-Side (PHP)

ClientValidation::extend('strong_password', function ($value) {
    return preg_match('/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/', $value);
}, 'Password must contain uppercase, lowercase, and numbers.');

NPM Subpath Exports

Examples

See the examples/ directory for complete demos:

• Alpine.js demo
• Vanilla JS demo
• Livewire demo

Testing

# PHP tests (Pest)
composer test

# JavaScript tests (Vitest)
npm test

License

The MIT License (MIT). See License File for more information.