bless 
Sometimes we can't get away from supporting Internet Explorer 9 and below. Unfortunately, this support can sometimes break our css due to these limitations, and when it does break it is almost impossible to track down. How do you get around such a crippling limitation? Well, you can slap this bless on top of your css and you should be alright.
bless analyzes your css files' selector counts and splits them appropriately, bringing them under the Internet Explorer's selector limit.
Installation
To use the cli tools:
npm install -g bless
To use the public api as part of your package:
npm install bless
CLI Usage
Commands:
count checks an existing css file and fails if the selector count exceeds IE limits
chunk breaks up css file into multiple files if it exceeds IE selector limits
Examples:
blessc count <file|directory>
blessc count <file|directory> --no-color
blessc chunk <file|directory> (chunked files will reside next to input css files with the format *.##.css)
blessc chunk <file|directory> --out-dir <output directory>
blessc chunk <file|directory> --sourcemaps (write out sourcemaps for css files with the format *.##.css.map)
API Usage
chunk(cssString, [options])
Separate the cssString into chunks that can be used by IE.
options:
source the path to the file containing the provided css.
sourceMaps a boolean for whether or not to output sourcemaps. source must be provided (defaults to false)
returns:
data An array of css strings for each css chunk
maps An array of css sourcemap strings for each css chunk. This will be empty if source is not provided or sourcemaps is not enabled
totalSelectorCount The total number of selectors in the provided css
example:
var parsedData = chunk(code, { source: './path/to/css.css' });
parsedCss.data //An array of css strings for each css chunk
parsedCss.maps //An array of css sourcemap strings for each css chunk. This is empty if source is empty or sourcemaps is false.
parsedCss.totalSelectorCount //The total number of selectors in the provided css file
chunkFile(filepath, options)
Separates the provided file into chunks.
options:
sourcemaps A boolean for whether or not to output sourcemaps. (Defaults to false)
returns:
A promise object resolving the chunked data with the same properties as chunk()
example:
chunkfile('./path/to/css.css').then(function(parsedCss, { sourcemaps: true }) {
parsedCss.data //An array of css strings for each css chunk
parsedCss.maps //An array of css sourcemap strings for each css chunk. This will be empty if sourcemaps is false.
parsedCss.totalSelectorCount //The total number of selectors in the provided css file
});
License
See LICENSE file.
Copyright (c) Paul Young