grunt-postcss-separator

This is a grunt wrapper for postcss-separator.

Split up your Data-URI (or anything else) into a separate CSS file.

Written with PostCSS.

Installation

npm install grunt-postcss-separator

Usage

Read source.css, process its content, and output processed CSS to styles.css and data.css.

If source.css has:

a.top:hover, a.top:focus {
	background-image: url("data:image");
}

a.top {
	background-image: url("data:image");
}

caption, th, td {
	text-align: left;
	font-weight: normal;
	vertical-align: middle;
}

q, blockquote {
	quotes: none;
}

q:before, q:after, blockquote:before, blockquote:after {
	content: "";
}

a img {
	border: none;
}

You will get the following output:

a.top:hover, a.top:focus {
	background-image: url("data:image");
}
a.top {
	background-image: url("data:image");
}

Options

All options of postcss-separator are available.

Furthermore you can use the option keepOrigin:

keepOrigin (only available in Grunt)

Type: boolean Default value: false

Keep the origin file untouched when defined as true. When defined as false the origin css file will be cleaned up.

Usage

You can enable this plugin in the Gruntfile.js of your project like that:

grunt.loadNpmTasks('grunt-postcss-separator');

Example

Here are some grunt examples:

• icons task splits up your dataURIs (data)
• prop task splits up a specific property (background-image)
• ie task splits up all ie classes (.lt-ie9)
• mediaQuery task splits up all media queries which match the RegExp
• print task splits up all @media print

separator: {
	options: {
		keepOrigin: true,
		dataFile: true
	},
	icons: {
		options: {
			pattern: {
				matchValue: /data/, // The RegExp to match values with
				matchParent: true // Rules (eg. in @media blocks) include their parent node.
			}
		},
		files: {
			'tmp/icons.css': ['test/fixtures/source.css']
		}
	},
	prop: {
		options: {
			pattern: {
				matchValue: false, // The RegExp to match values with
				matchProp: /background-image/, // The RegExp to match values with
				matchParent: true // Rules (eg. in @media blocks) include their parent node.
			}
		},
		files: {
			'tmp/prop.css': ['test/fixtures/source.css']
		}
	},
	ie: {
		options: {
			pattern: {
				matchRule: /lt-ie9/, // The RegExp to match values with
				matchMedia: false, // The RegExp to match media queries with
				matchParent: true // Rules (eg. in @media blocks) include their parent node.
			}
		},
		files: {
			'tmp/ie.css': ['test/fixtures/source.css']
		}
	},
	mediaQuery: {
		options: {
			pattern: {
				matchValue: false, // The RegExp to match values with
				matchRule: false, // The RegExp to match values with
				matchMedia: /((min|max)-)?resolution\:\s*(\d+)?\.?(\d+)?dppx/, // The RegExp to match media queries with
				matchParent: false // Rules (eg. in @media blocks) include their parent node.
			}
		},
		files: {
			'tmp/image.css': ['test/fixtures/source.css']
		}
	},
	print: {
		options: {
			pattern: {
				matchValue: false, // The RegExp to match values with
				matchRule: false, // The RegExp to match values with
				matchMedia: false, // The RegExp to match media queries with
				matchParent: false, // Rules (eg. in @media blocks) include their parent node.
				matchAtRuleType: /print/ // Rules (eg. in @media blocks) include their parent node.
			}
		},
		files: {
			'tmp/print.css': ['source.css']
		}
	}
}

License

Copyright (c) 2015 Sebastian Fitzner. Licensed under the MIT license.

ToDos

• Add tests