Laravel Precognition: Real-Time Validation Without Duplicating Rules

tarun.laravel311

19 June 2026

Modern web applications demand instant feedback, and Laravel Precognition solves this problem by enabling real-time validation.

Users expect forms to validate as they type. As a result, errors appear immediately instead of waiting until form submission.

Traditionally, developers maintained validation rules in both the frontend and backend.

This often resulted in duplicated logic and inconsistencies. It also increased maintenance effort over time.

Frontend applications can validate data using those same server-side rules.

This keeps validation logic centralized while delivering a modern user experience.

In this article, we’ll explore what Laravel Precognition is, how it works, and how to implement it with practical examples.

What is Laravel Precognition?

Laravel Precognition enables your frontend to validate form data before the final request is submitted.

Instead of duplicating validation rules in JavaScript, the frontend sends a special “precognitive” request to Laravel.

Laravel processes the request, runs validation, and returns validation results without executing the controller’s business logic.

You can review the full behavior in the official Laravel Precognition documentation.This means your application can:

Validate fields in real time
Use backend validation rules as the single source of truth
Reduce frontend complexity
Improve maintainability
Deliver a better user experience

Why Use Laravel Precognition?

Consider a user registration form.

Without Precognition, you might maintain validation rules in multiple places:

Frontend Validation

if (password.length < 8) {
   showError('Password must be at least 8 characters');
}

if (password.length < 8) {

showError('Password must be at least 8 characters');

}

Backend Validation

'password' => ['required', 'min:8']

1	'password' => ['required', 'min:8']

As applications grow, keeping these rules synchronized becomes difficult.

With Precognition, Laravel handles validation centrally, and the frontend simply requests validation results from the server.

Installation

Install Laravel Precognition:

composer require laravel/precognition

1	composer require laravel/precognition

Install the frontend package based on your framework:

Vue

npm install laravel-precognition-vue

1	npm install laravel-precognition-vue

React

npm install laravel-precognition-react

1	npm install laravel-precognition-react

Inertia

npm install laravel-precognition-vue-inertia

1	npm install laravel-precognition-vue-inertia

Creating Your First Precognitive Form

Step 1: Create a Form Request

Generate a request class:

php artisan make:request RegisterRequest

1	php artisan make:request RegisterRequest

Define validation rules:

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class RegisterRequest extends FormRequest
{
  public function authorize(): bool
  {
     return true;
  }

  public function rules(): array
  {
     return [
       'name' => [
           'required',
           'string',
           'min:3',
           'max:50'
       ],
       'email' => [
           'required',
           'email',
           'unique:users,email'
       ],
       'password' => [
           'required',
           'min:8',
           'confirmed'
       ]
    ];
  }
}

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class RegisterRequest extends FormRequest

{

public function authorize(): bool

{

return true;

}

public function rules(): array

{

return [

'name' => [

'required',

'string',

'min:3',

'max:50'

'email' => [

'required',

'email',

'unique:users,email'

'password' => [

'required',

'min:8',

'confirmed'

]

];

}

Step 2: Create the Controller

namespace App\Http\Controllers;

use App\Http\Requests\RegisterRequest;
use App\Models\User;
use Illuminate\Support\Facades\Hash;

class RegisterController extends Controller
{
     public function store(RegisterRequest $request)
     {
         User::create([
            'name' => $request->name,
            'email' => $request->email,
            'password' => Hash::make($request->password),
         ]);

        return response()->json([
           'message' => 'Registration successful'
        ]);
     }
}

namespace App\Http\Controllers;

use App\Http\Requests\RegisterRequest;

use App\Models\User;

use Illuminate\Support\Facades\Hash;

class RegisterController extends Controller

{

public function store(RegisterRequest $request)

{

User::create([

'name' => $request->name,

'email' => $request->email,

'password' => Hash::make($request->password),

]);

return response()->json([

'message' => 'Registration successful'

]);

}

Step 3: Define the Route

use App\Http\Controllers\RegisterController;

Route::post('/register', [RegisterController::class, 'store']);

use App\Http\Controllers\RegisterController;

Route::post('/register', [RegisterController::class, 'store']);

At this point, Laravel is ready to handle both regular submissions and precognitive validation requests.

Implementing Precognition with Vue

Initialize the Form

Here’s how Laravel Precognition handles real-time validation inside a Vue component.

import { useForm } from 'laravel-precognition-vue';

const form = useForm('post', '/register', { name: '', email: '', password: '', password_confirmation: ''});

import { useForm } from 'laravel-precognition-vue';

const form = useForm('post', '/register', { name: '', email: '', password: '', password_confirmation: ''});

Validate Fields in Real Time

<input
   v-model="form.email"
   @change="form.validate('email')"
/>

<div v-if="form.errors.email">
  {{ form.errors.email }}
</div>

<input

v-model="form.email"

@change="form.validate('email')"

</div>

Whenever the field changes, Laravel validates it using the backend rules and returns any validation errors.

Submit the Form

form.submit();

1	form.submit();

The same validation rules used during live validation are automatically applied during submission.

Real-Time Unique Email Validation

One of Precognition’s most powerful features is validating data that depends on the database.

'email' => [
    'required',
    'email',
    'unique:users,email'
]

'email' => [

'required',

'email',

'unique:users,email'

]

As the user enters an email address, Laravel checks whether the email already exists and immediately returns validation feedback.

No duplicate frontend logic required.

When Should You Use Laravel Precognition?

Laravel Precognition is an excellent choice for:

Registration Forms
Login & Password Recovery
Profile Management
Username Availability Checks
Product SKU Validation
Checkout Processes
Multi-Step Wizards
SaaS Onboarding Flows
Admin Dashboards
Enterprise Applications

Any form that benefits from real-time feedback can leverage Precognition.

Conclusion

Laravel Precognition bridges the gap between frontend experiences and backend validation.

It eliminates duplicated logic and improves application maintainability.

As a result, developers can build cleaner applications while providing a better user experience.

This same approach applies across every form in your app. It also ensures consistent validation across the application.

It provides a simple solution for real-time validation. Developers can deliver a modern user experience without duplicating validation logic.

If you’re already using Laravel Form Requests, integrating Precognition is straightforward. It also enhances the overall user experience.

Define your validation rules once, validate everywhere, and let Laravel Precognition handle the rest.

Key Takeaways

Enables real-time backend validation.
Validation rules remain centralized in Laravel.
Works seamlessly with Form Requests.
Supports Vue, React, Inertia, and Blade applications.
Handles database checks, custom rules, and conditional validation.
Improves UX without duplicating validation logic.
Reduces maintenance costs and validation inconsistencies.

By adopting it, you can build faster, cleaner, and more reliable form experiences.

You can also hire laravel developers to build your custom solutions on laravel.

For exploring the available extensions for Bagisto, you can check out the bagisto extension marketplace.