Spritely is a Dart package that uses transformers to generate CSS sprite sheets.
Add Spritely to your pubspec.yaml.
name: my_app
description: A web application
dependencies:
browser: any
spritely: any
transformers:
- spritely
Spritely looks for links to a sprite sheet's CSS file. If one is found, it'll generate a CSS file and sprite sheet with all the PNGs that are contained within the directory of the same name as the sprite sheet.
For example, lets say you have a Dart application with the following folder structure:
my_app/
lib/
web/
images/
icons/
star.png
info.png
index.html
To tell Spritely to generate a sprite sheet for all PNGs in web/images/icons, reference web/images/icons.css from an HTML file.
The generated CSS file contains classes that reference each sprite within the sheet. For each image, a class with the naming convention {folder-name}-{image-name} will be generated. Each class sets the element's background-image, background-position, width and height.
Using the star.png and info.png sprites in index.html:
<html>
<head>
<title>My App</title>
<link rel="stylesheet" href="images/icons.css">
</head>
<body>
<div class="icons-star"></div>
<div class="icons-info"></div>
</body>
</html>
Running pub build will compile your application and any referenced sprite sheets. Using the previous example, pub build would generate the following directory structure:
my_app/
build/
web/
images/
icons/
star.png
plus.png
icons.css
icons.png
index.html
...
- Add support for SASS
- Add support for LESS
- Customization options: padding, sprite layout, etc.