Configuration

You must configure CSScomb before use. There are a number of ways how you can do it.

Use one of predefined configs

There are several config files included in this project you can use right away:

csscomb
zen
yandex

In CLI, csscomb is a default config file that is used unless you provide your own. In Node.js, you can pass config's name to constructor:

var Comb = require('csscomb');
var comb = new Comb('yandex');

Feel free to use predefined configs as examples: copy one of them and modify to your taste. Just remember to save the file as .csscomb.json in project's root.

Create custom config

You can easily write your own configuration. The only requirement is that config is valid JSON in order to work correctly.

Here is an example:

{
    "exclude": ["node_modules/**"],
    "verbose": true,

    "always-semicolon": true,
    "color-case": "lower",
    "color-shorthand": true,
    "element-case": "lower",
    "eof-newline": true,
    "leading-zero": false,
    "quotes": "single",
    "remove-empty-rulesets": true,
    "strip-spaces": true,
    "unitless-zero": true,
    "vendor-prefix-align": true
}

Take a look at available options and choose those you need. You can use our visual config builder to choose most options.

Where to put config

CSScomb will look for a file named .csscomb.json. The best way is to put the file in your project's root. However, if you want to use one config for several projects, it's fine to put the file inside a parent folder. CSScomb will look for a config file recursively up untill it reaches your HOME directory.

Remember that you can always set custom path. In CLI:

csscomb -c path/to/config assets/css

In Node.js:

var Comb = require('csscomb');
var config = require('path/to/config');
var comb = new Comb(config);

Generate config from a template

Instead of configuring all the options one by one, you can use a template file: CSScomb will detect the coding style and use it as a config. All existing properties except sort-order can be configured this way:

csscomb -d example.css > .csscomb.json

This will create .csscomb.json based on options that can be detected in example.css file.

Let's say your template file has following content:

.foo
{
    width: #fff;
}

Generated config wiil then look this way:

{
    "remove-empty-rulesets": true,
    "always-semicolon": true,
    "color-case": "lower",
    "color-shorthand": true,
    "strip-spaces": true,
    "eof-newline": true
}

Override template's settings

You can use template inside existing config and then complete it or override some of detected settings:

{
    "template": "example.css",
    "leading-zero": false,
    "vendor-prefix-align": true
}

This config will:

detect all the options from the example.css,
then use "leading-zero": false instead of anything detected,
then use "vendor-prefix-align": true even if there were no prefixed properties or values inside the example.css.