rofrischmann/inline-style-prefixer

import prefixProperty from './utils/prefixProperty'
import prefixValue from './utils/prefixValue'

import addNewValuesOnly from './utils/addNewValuesOnly'
import isObject from './utils/isObject'

export default function createPrefixer({ prefixMap, plugins }) {
  return function prefix(style) {
    for (const property in style) {
      const value = style[property]

      // handle nested objects
      if (isObject(value)) {
        style[property] = prefix(value)
        // handle array values
      } else if (Array.isArray(value)) {
        const combinedValue = []

        for (let i = 0, len = value.length; i < len; ++i) {
          const processedValue = prefixValue(
            plugins,
            property,
            value[i],
            style,
            prefixMap
          )

          addNewValuesOnly(combinedValue, processedValue || value[i])
        }

        // only modify the value if it was touched
        // by any plugin to prevent unnecessary mutations
        if (combinedValue.length > 0) {
          style[property] = combinedValue
        }
      } else {
        const processedValue = prefixValue(
          plugins,
          property,
          value,
          style,
          prefixMap
        )

        // only modify the value if it was touched
        // by any plugin to prevent unnecessary mutations
        if (processedValue) {
          style[property] = processedValue
        }

        style = prefixProperty(prefixMap, property, style)
      }
    }

    return style
  }
}