cssstats/lib/get-all-font-families.js

High-level stats for stylesheets

var shorthandExpand = require('css-shorthand-expand')

module.exports = function(properties) {
  properties = properties || this.properties

  if (!properties) {
    return 0
  }

  var families = properties['font-family'] || []

  if (properties.font) {
    families = families.concat(
      properties.font
        .map(function(value) {
          try {
            return shorthandExpand('font', value)['font-family']
          } catch (e) {}
        })
        .filter(function(value) {
          return value
        })
    )
  }

  return families
}