csslint

A linter for CSS code. More information: https://github.com/CSSLint/csslint/wiki/Command-line-interface.

• Lint a single CSS file:
  csslint {{file.css}}
• Lint multiple CSS files:
  csslint {{file1.css}} {{file2.css}} {{file3.css}}
• List all possible style rules:
  csslint --list-rules
• Specify certain rules as errors (which result in a non-zero exit code):
  csslint --errors={{errors,universal-selector,imports}} {{file.css}}
• Specify certain rules as warnings:
  csslint --warnings={{box-sizing,selector-max,floats}} {{file.css}}
• Specify certain rules to ignore:
  csslint --ignore={{ids,rules-count,shorthand}} {{file.css}}