Create A Laravel Cookie Consent Banner Without JavaScript
Tags: laravel, cookies, javascript, tutorial
Published: 2021-11-26 16:52:09

To comply with EU GDPR (General Data Protection Regulation) [law](https://wikis.ec.europa.eu/display/WEBGUIDE/04.+Cookies+and+similar+technologies), all the websites owned by or targeted the EU users should inform and get consent from visitors beforehand to store or retrieve any information from their devices. It protects the privacy of visitors by making them aware of how their information is being collected and used. Also, it gives visitors a chance to allow or not. We use a “Cookie Consent Banner” to inform and get that consent from visitors. In this tutorial, we are going to explore the possibilities and the capabilities of Laravel to implement such a thing in our Laravel application, of course, without using any JavaScript code.

## How Cookie Consent Banners Work

As a convention, we use JavaScript for this kind of task. When the page loads, a piece of Javascript code checks whether a particular cookie exists or not. If the cookie is not available in the user's browser, then it will display the cookie consent banner. Otherwise, it will hide the banner. Also, when the user clicked the “Accept” button, we create that cookie in the browser.

Wait! But how do we implement such a thing without using Javascript? Well, whenever a user requests a page, Laravel checks whether the user's browser has a particular cookie called “cookie-consent”. If it does not exist, then it renders the cookie consent banner as expected. But if it is there, Laravel renders the rest of the page without rendering the banner. When the user clicked the “Accept” button, it will load a special route that instructs the user's browser to set the “cookie-consent” cookie.

Before and after the “Accept” button clicked.

![Before and after cookie-consent cookie creation](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/z0njdcp8rhlmaqqfbl3u.png)

Here we can see, Laravel instructs the client's browser to create the "cookie-consent" cookie upon “Accept” click.

![Response header with Set-Cookie cookie-consent](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/3559vxan90uqnnzuq6se.png)

Also, that route will redirect the user to the previous page without displaying anything.

## Create The Laravel Project

So let's get started. First, we are going to create a brand-new Laravel project, of course, you can even use these steps in your existing Laravel applications as well. Create a new Laravel project using the Composer. If you having problems with creating a Laravel project, you may read the [How To Install Laravel 8 On Ubuntu 20.04 LTS](http://laravel.test/posts/how-to-install-laravel-8-on-ubuntu-2004-lts) guide.

```
composer create-project laravel/laravel --prefer-dist no-js-cookie-consent-app
```

## Install Laravel Breeze

For this tutorial, we are using Laravel with [TailwindCSS](https://tailwindcss.com) to design the UI of the banner. If you need, you can manually implement TailwindCSS into the Laravel by adding and configuring everything manually. But fortunately, we have [Laravel Breeze](https://github.com/laravel/breeze)! Let's install it in our application.

```
composer require laravel/breeze --dev
```

Nice! Then run the following command, it will copy all the necessary files into their correct places.

```
php artisan breeze:install
```

Now we need to build the frontend using the following commands. The first command, `npm install` will install all the necessary NPM packages and the second command, `npm run dev` will build CSS.

```
npm install && npm run dev
```

We do not need to run `npm install` every time, `npm run watch` is sufficient to continuously rebuild CSS (and JS) automatically as you make changes. Now we can start the Laravel app by running the following command.

```
php artisan serve
```

In a separate terminal window, run the following command to start building the CSS.

```
npm run watch
```

## Invokable Controller

Create a controller called `CookieConsentController` with `--invokable` flag. Laravel invokable controllers have one purpose and do not have regular controller methods like index, create, store, show, edit, update and destroy.

```
php artisan make:controller CookieConsentController --invokable
```

Add the following code to the `__invoke` method of the `CookieConsentController` file. When it gets a request, it will create a cookie called "cookie-consent" which expire in one year. Then it will redirect to the previous page.

```
public function __invoke(Request $request)
{
    Cookie::queue('cookie-consent', 1, 60 * 24 * 365 * 1);

    return redirect()->back();
}
```

## Cookie Consent Banner Component

Instead of putting the same code over and over again, we are going to create the cookie consent banner in a re-usable component.

Add the following codes to `/resources/views/components/cookie-consent-banner.blade.php` file. This file contains all the HTML markup with TailwindCSS classes.

```
<!-- /resources/views/components/cookie-consent-banner.blade.php -->
@if(!Cookie::get('cookie-consent'))
<div class="min-h-screen bg-gray-100 py-6 flex flex-col justify-center sm:py-12">
  <div class="bg-gray-800 shadow-md max-w-sm fixed right-0 bottom-0 mx-4 mb-4 p-4 rounded-lg">
    <div class="grid grid-cols-4">
      <div class="w-full">
        <svg class="w-full h-20 mt-2" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0" y="0" width="202" height="194" viewBox="0, 0, 202, 194">
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        </svg>
      </div>
      <div class="text-white col-span-3 pl-3">
        <div class="py-2 text-sm">Hey! We are using cookies! Read our <a href="#" class="underline">privacy policy</a> for more information.</div>
        <div class="mt-2 flex justify-end gap-x-2">
          <a href="https://google.com" class="bg-red-500 px-3 py-1 text-sm rounded">Exit</a>
          <a href="{{ route('cookieConsent') }}" class="bg-green-600 px-3 py-1 text-sm rounded">Accept</a>
        </div>
      </div>
    </div>
  </div>
</div>
@endif
```

Open the `resources/views/welcome.blade.php` file and add the CSS file before closing the </head> tag.

```
    <link rel="stylesheet" href="{{ asset('css/app.css') }}">
</head>
```

Again include the `cookie-consent-banner.blade.php` component to the same welcome.blade.php file. Make sure to add it before closing the `</body>` tag.

```
    <x-cookie-consent-banner />
</body>
```

Repeat the above mentioned two steps for all other pages.

## Routes

Add this new route to `web.php` file.

```
Route::get('/cookie-consent', CookieConsentController::class)->name('cookieConsent');
```

## Production Build

Now everything is almost completed and you can run the following command to build the CSS for production. It will build an optimized version by removing all the unnecessary classes. But before that, make sure to terminate the execution of the previous `npm run watch` command by pressing `[Ctrl]` + `[C]` keys.

```
npm run prod
```

## Conclusion

In this tutorial, we discussed an alternative method that we can use to achieve interactive functionality which is usually done with JavaScript. This method can be a good fallback strategy especially when the user disables JavaScript in their browser. We can even extend this method to pass additional data as URL parameters. Among the downsides, we cannot do anything with this method without human interaction. Also, we cannot avoid full page refreshes. What do you think about this tutorial? Let us know your thoughts in the comment section.

Feel free to visit [devtonight.com](https://devtonight.com) for more related content.