Nette Assets is a powerful asset management library for PHP that helps you:

✅ organize and serve your static assets (images, CSS, JavaScript, audio, etc.)
✅ handle asset versioning automatically
✅ get image dimensions without hassle
✅ verify asset existence in development mode
✅ support multiple storage backends

The library provides a clean and intuitive API to manage static assets in your web applications with focus on developer experience and performance.

The recommended way to install is via Composer:

composer require nette/assets

Nette Assets requires PHP 8.1 or higher.

First, configure your assets in your application's configuration file:

assets:
	mapping:
		default: assets       # maps 'default:' prefix to /assets directory
		audio: media/audio    # maps 'audio:' prefix to /media/audio directory

Then use assets in your Latte templates:

<script src={asset('app.js')} defer></script>

You can also use mapper-specific prefixes:

<audio src={asset('audio:podcast.mp3')} controls></audio>

The library automatically appends version query string to asset URLs based on file modification time:

{asset('app.js')}

generates for example:

/assets/app.js?v=1699944800

This ensures proper cache invalidation when assets change.

Get image dimensions easily in templates:

<img src={asset('logo.png')} width={assetWidth('logo.png')} height={assetHeight('logo.png')}>

The library supports multiple mappers, which can be configured independently:

assets:
	mapping:
		product: App\UI\Accessory\ProductMapper(https://img.example.com, %rootDir%/www.img)