node_modules/autoprefixer/lib/hacks/grid-area.js

let Declaration = require('../declaration')
let utils = require('./grid-utils')

class GridArea extends Declaration {
  /**
   * Translate grid-area to separate -ms- prefixed properties
   */
  insert(decl, prefix, prefixes, result) {
    if (prefix !== '-ms-') return super.insert(decl, prefix, prefixes)

    let values = utils.parse(decl)

    let [rowStart, rowSpan] = utils.translate(values, 0, 2)
    let [columnStart, columnSpan] = utils.translate(values, 1, 3)

    ;[
      ['grid-row', rowStart],
      ['grid-row-span', rowSpan],
      ['grid-column', columnStart],
      ['grid-column-span', columnSpan]
    ].forEach(([prop, value]) => {
      utils.insertDecl(decl, prop, value)
    })

    utils.warnTemplateSelectorNotFound(decl, result)
    utils.warnIfGridRowColumnExists(decl, result)

    return undefined
  }
}

GridArea.names = ['grid-area']

module.exports = GridArea