Index: node_modules/autoprefixer/lib/hacks/grid-utils.js
===================================================================
--- node_modules/autoprefixer/lib/hacks/grid-utils.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/autoprefixer/lib/hacks/grid-utils.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,1113 @@
+let parser = require('postcss-value-parser')
+let list = require('postcss').list
+
+let uniq = require('../utils').uniq
+let escapeRegexp = require('../utils').escapeRegexp
+let splitSelector = require('../utils').splitSelector
+
+function convert(value) {
+  if (
+    value &&
+    value.length === 2 &&
+    value[0] === 'span' &&
+    parseInt(value[1], 10) > 0
+  ) {
+    return [false, parseInt(value[1], 10)]
+  }
+
+  if (value && value.length === 1 && parseInt(value[0], 10) > 0) {
+    return [parseInt(value[0], 10), false]
+  }
+
+  return [false, false]
+}
+
+exports.translate = translate
+
+function translate(values, startIndex, endIndex) {
+  let startValue = values[startIndex]
+  let endValue = values[endIndex]
+
+  if (!startValue) {
+    return [false, false]
+  }
+
+  let [start, spanStart] = convert(startValue)
+  let [end, spanEnd] = convert(endValue)
+
+  if (start && !endValue) {
+    return [start, false]
+  }
+
+  if (spanStart && end) {
+    return [end - spanStart, spanStart]
+  }
+
+  if (start && spanEnd) {
+    return [start, spanEnd]
+  }
+
+  if (start && end) {
+    return [start, end - start]
+  }
+
+  return [false, false]
+}
+
+exports.parse = parse
+
+function parse(decl) {
+  let node = parser(decl.value)
+
+  let values = []
+  let current = 0
+  values[current] = []
+
+  for (let i of node.nodes) {
+    if (i.type === 'div') {
+      current += 1
+      values[current] = []
+    } else if (i.type === 'word') {
+      values[current].push(i.value)
+    }
+  }
+
+  return values
+}
+
+exports.insertDecl = insertDecl
+
+function insertDecl(decl, prop, value) {
+  if (value && !decl.parent.some(i => i.prop === `-ms-${prop}`)) {
+    decl.cloneBefore({
+      prop: `-ms-${prop}`,
+      value: value.toString()
+    })
+  }
+}
+
+// Track transforms
+
+exports.prefixTrackProp = prefixTrackProp
+
+function prefixTrackProp({ prefix, prop }) {
+  return prefix + prop.replace('template-', '')
+}
+
+function transformRepeat({ nodes }, { gap }) {
+  let { count, size } = nodes.reduce(
+    (result, node) => {
+      if (node.type === 'div' && node.value === ',') {
+        result.key = 'size'
+      } else {
+        result[result.key].push(parser.stringify(node))
+      }
+      return result
+    },
+    {
+      count: [],
+      key: 'count',
+      size: []
+    }
+  )
+
+  // insert gap values
+  if (gap) {
+    size = size.filter(i => i.trim())
+    let val = []
+    for (let i = 1; i <= count; i++) {
+      size.forEach((item, index) => {
+        if (index > 0 || i > 1) {
+          val.push(gap)
+        }
+        val.push(item)
+      })
+    }
+
+    return val.join(' ')
+  }
+
+  return `(${size.join('')})[${count.join('')}]`
+}
+
+exports.prefixTrackValue = prefixTrackValue
+
+function prefixTrackValue({ gap, value }) {
+  let result = parser(value).nodes.reduce((nodes, node) => {
+    if (node.type === 'function' && node.value === 'repeat') {
+      return nodes.concat({
+        type: 'word',
+        value: transformRepeat(node, { gap })
+      })
+    }
+    if (gap && node.type === 'space') {
+      return nodes.concat(
+        {
+          type: 'space',
+          value: ' '
+        },
+        {
+          type: 'word',
+          value: gap
+        },
+        node
+      )
+    }
+    return nodes.concat(node)
+  }, [])
+
+  return parser.stringify(result)
+}
+
+// Parse grid-template-areas
+
+let DOTS = /^\.+$/
+
+function track(start, end) {
+  return { end, span: end - start, start }
+}
+
+function getColumns(line) {
+  return line.trim().split(/\s+/g)
+}
+
+exports.parseGridAreas = parseGridAreas
+
+function parseGridAreas({ gap, rows }) {
+  return rows.reduce((areas, line, rowIndex) => {
+    if (gap.row) rowIndex *= 2
+
+    if (line.trim() === '') return areas
+
+    getColumns(line).forEach((area, columnIndex) => {
+      if (DOTS.test(area)) return
+
+      if (gap.column) columnIndex *= 2
+
+      if (typeof areas[area] === 'undefined') {
+        areas[area] = {
+          column: track(columnIndex + 1, columnIndex + 2),
+          row: track(rowIndex + 1, rowIndex + 2)
+        }
+      } else {
+        let { column, row } = areas[area]
+
+        column.start = Math.min(column.start, columnIndex + 1)
+        column.end = Math.max(column.end, columnIndex + 2)
+        column.span = column.end - column.start
+
+        row.start = Math.min(row.start, rowIndex + 1)
+        row.end = Math.max(row.end, rowIndex + 2)
+        row.span = row.end - row.start
+      }
+    })
+
+    return areas
+  }, {})
+}
+
+// Parse grid-template
+
+function testTrack(node) {
+  return node.type === 'word' && /^\[.+]$/.test(node.value)
+}
+
+function verifyRowSize(result) {
+  if (result.areas.length > result.rows.length) {
+    result.rows.push('auto')
+  }
+  return result
+}
+
+exports.parseTemplate = parseTemplate
+
+function parseTemplate({ decl, gap }) {
+  let gridTemplate = parser(decl.value).nodes.reduce(
+    (result, node) => {
+      let { type, value } = node
+
+      if (testTrack(node) || type === 'space') return result
+
+      // area
+      if (type === 'string') {
+        result = verifyRowSize(result)
+        result.areas.push(value)
+      }
+
+      // values and function
+      if (type === 'word' || type === 'function') {
+        result[result.key].push(parser.stringify(node))
+      }
+
+      // divider(/)
+      if (type === 'div' && value === '/') {
+        result.key = 'columns'
+        result = verifyRowSize(result)
+      }
+
+      return result
+    },
+    {
+      areas: [],
+      columns: [],
+      key: 'rows',
+      rows: []
+    }
+  )
+
+  return {
+    areas: parseGridAreas({
+      gap,
+      rows: gridTemplate.areas
+    }),
+    columns: prefixTrackValue({
+      gap: gap.column,
+      value: gridTemplate.columns.join(' ')
+    }),
+    rows: prefixTrackValue({
+      gap: gap.row,
+      value: gridTemplate.rows.join(' ')
+    })
+  }
+}
+
+// Insert parsed grid areas
+
+/**
+ * Get an array of -ms- prefixed props and values
+ * @param  {Object} [area] area object with column and row data
+ * @param  {Boolean} [addRowSpan] should we add grid-column-row value?
+ * @param  {Boolean} [addColumnSpan] should we add grid-column-span value?
+ * @return {Array<Object>}
+ */
+function getMSDecls(area, addRowSpan = false, addColumnSpan = false) {
+  let result = [
+    {
+      prop: '-ms-grid-row',
+      value: String(area.row.start)
+    }
+  ]
+  if (area.row.span > 1 || addRowSpan) {
+    result.push({
+      prop: '-ms-grid-row-span',
+      value: String(area.row.span)
+    })
+  }
+  result.push({
+    prop: '-ms-grid-column',
+    value: String(area.column.start)
+  })
+  if (area.column.span > 1 || addColumnSpan) {
+    result.push({
+      prop: '-ms-grid-column-span',
+      value: String(area.column.span)
+    })
+  }
+  return result
+}
+
+function getParentMedia(parent) {
+  if (parent.type === 'atrule' && parent.name === 'media') {
+    return parent
+  }
+  if (!parent.parent) {
+    return false
+  }
+  return getParentMedia(parent.parent)
+}
+
+/**
+ * change selectors for rules with duplicate grid-areas.
+ * @param  {Array<Rule>} rules
+ * @param  {Array<String>} templateSelectors
+ * @return {Array<Rule>} rules with changed selectors
+ */
+function changeDuplicateAreaSelectors(ruleSelectors, templateSelectors) {
+  ruleSelectors = ruleSelectors.map(selector => {
+    let selectorBySpace = list.space(selector)
+    let selectorByComma = list.comma(selector)
+
+    if (selectorBySpace.length > selectorByComma.length) {
+      selector = selectorBySpace.slice(-1).join('')
+    }
+    return selector
+  })
+
+  return ruleSelectors.map(ruleSelector => {
+    let newSelector = templateSelectors.map((tplSelector, index) => {
+      let space = index === 0 ? '' : ' '
+      return `${space}${tplSelector} > ${ruleSelector}`
+    })
+
+    return newSelector
+  })
+}
+
+/**
+ * check if selector of rules are equal
+ * @param  {Rule} ruleA
+ * @param  {Rule} ruleB
+ * @return {Boolean}
+ */
+function selectorsEqual(ruleA, ruleB) {
+  return ruleA.selectors.some(sel => {
+    return ruleB.selectors.includes(sel)
+  })
+}
+
+/**
+ * Parse data from all grid-template(-areas) declarations
+ * @param  {Root} css css root
+ * @return {Object} parsed data
+ */
+function parseGridTemplatesData(css) {
+  let parsed = []
+
+  // we walk through every grid-template(-areas) declaration and store
+  // data with the same area names inside the item
+  css.walkDecls(/grid-template(-areas)?$/, d => {
+    let rule = d.parent
+    let media = getParentMedia(rule)
+    let gap = getGridGap(d)
+    let inheritedGap = inheritGridGap(d, gap)
+    let { areas } = parseTemplate({ decl: d, gap: inheritedGap || gap })
+    let areaNames = Object.keys(areas)
+
+    // skip node if it doesn't have areas
+    if (areaNames.length === 0) {
+      return true
+    }
+
+    // check parsed array for item that include the same area names
+    // return index of that item
+    let index = parsed.reduce((acc, { allAreas }, idx) => {
+      let hasAreas = allAreas && areaNames.some(area => allAreas.includes(area))
+      return hasAreas ? idx : acc
+    }, null)
+
+    if (index !== null) {
+      // index is found, add the grid-template data to that item
+      let { allAreas, rules } = parsed[index]
+
+      // check if rule has no duplicate area names
+      let hasNoDuplicates = rules.some(r => {
+        return r.hasDuplicates === false && selectorsEqual(r, rule)
+      })
+
+      let duplicatesFound = false
+
+      // check need to gather all duplicate area names
+      let duplicateAreaNames = rules.reduce((acc, r) => {
+        if (!r.params && selectorsEqual(r, rule)) {
+          duplicatesFound = true
+          return r.duplicateAreaNames
+        }
+        if (!duplicatesFound) {
+          areaNames.forEach(name => {
+            if (r.areas[name]) {
+              acc.push(name)
+            }
+          })
+        }
+        return uniq(acc)
+      }, [])
+
+      // update grid-row/column-span values for areas with duplicate
+      // area names. @see #1084 and #1146
+      rules.forEach(r => {
+        areaNames.forEach(name => {
+          let area = r.areas[name]
+          if (area && area.row.span !== areas[name].row.span) {
+            areas[name].row.updateSpan = true
+          }
+
+          if (area && area.column.span !== areas[name].column.span) {
+            areas[name].column.updateSpan = true
+          }
+        })
+      })
+
+      parsed[index].allAreas = uniq([...allAreas, ...areaNames])
+      parsed[index].rules.push({
+        areas,
+        duplicateAreaNames,
+        hasDuplicates: !hasNoDuplicates,
+        node: rule,
+        params: media.params,
+        selectors: rule.selectors
+      })
+    } else {
+      // index is NOT found, push the new item to the parsed array
+      parsed.push({
+        allAreas: areaNames,
+        areasCount: 0,
+        rules: [
+          {
+            areas,
+            duplicateAreaNames: [],
+            duplicateRules: [],
+            hasDuplicates: false,
+            node: rule,
+            params: media.params,
+            selectors: rule.selectors
+          }
+        ]
+      })
+    }
+
+    return undefined
+  })
+
+  return parsed
+}
+
+/**
+ * insert prefixed grid-area declarations
+ * @param  {Root}  css css root
+ * @param  {Function} isDisabled check if the rule is disabled
+ * @return {void}
+ */
+exports.insertAreas = insertAreas
+
+function insertAreas(css, isDisabled) {
+  // parse grid-template declarations
+  let gridTemplatesData = parseGridTemplatesData(css)
+
+  // return undefined if no declarations found
+  if (gridTemplatesData.length === 0) {
+    return undefined
+  }
+
+  // we need to store the rules that we will insert later
+  let rulesToInsert = {}
+
+  css.walkDecls('grid-area', gridArea => {
+    let gridAreaRule = gridArea.parent
+    let hasPrefixedRow = gridAreaRule.first.prop === '-ms-grid-row'
+    let gridAreaMedia = getParentMedia(gridAreaRule)
+
+    if (isDisabled(gridArea)) {
+      return undefined
+    }
+
+    let gridAreaRuleIndex = css.index(gridAreaMedia || gridAreaRule)
+
+    let value = gridArea.value
+    // found the data that matches grid-area identifier
+    let data = gridTemplatesData.filter(d => d.allAreas.includes(value))[0]
+
+    if (!data) {
+      return true
+    }
+
+    let lastArea = data.allAreas[data.allAreas.length - 1]
+    let selectorBySpace = list.space(gridAreaRule.selector)
+    let selectorByComma = list.comma(gridAreaRule.selector)
+    let selectorIsComplex =
+      selectorBySpace.length > 1 &&
+      selectorBySpace.length > selectorByComma.length
+
+    // prevent doubling of prefixes
+    if (hasPrefixedRow) {
+      return false
+    }
+
+    // create the empty object with the key as the last area name
+    // e.g if we have templates with "a b c" values, "c" will be the last area
+    if (!rulesToInsert[lastArea]) {
+      rulesToInsert[lastArea] = {}
+    }
+
+    let lastRuleIsSet = false
+
+    // walk through every grid-template rule data
+    for (let rule of data.rules) {
+      let area = rule.areas[value]
+      let hasDuplicateName = rule.duplicateAreaNames.includes(value)
+
+      // if we can't find the area name, update lastRule and continue
+      if (!area) {
+        let lastRule = rulesToInsert[lastArea].lastRule
+        let lastRuleIndex
+        if (lastRule) {
+          lastRuleIndex = css.index(lastRule)
+        } else {
+          /* c8 ignore next 2 */
+          lastRuleIndex = -1
+        }
+
+        if (gridAreaRuleIndex > lastRuleIndex) {
+          rulesToInsert[lastArea].lastRule = gridAreaMedia || gridAreaRule
+        }
+        continue
+      }
+
+      // for grid-templates inside media rule we need to create empty
+      // array to push prefixed grid-area rules later
+      if (rule.params && !rulesToInsert[lastArea][rule.params]) {
+        rulesToInsert[lastArea][rule.params] = []
+      }
+
+      if ((!rule.hasDuplicates || !hasDuplicateName) && !rule.params) {
+        // grid-template has no duplicates and not inside media rule
+
+        getMSDecls(area, false, false)
+          .reverse()
+          .forEach(i =>
+            gridAreaRule.prepend(
+              Object.assign(i, {
+                raws: {
+                  between: gridArea.raws.between
+                }
+              })
+            )
+          )
+
+        rulesToInsert[lastArea].lastRule = gridAreaRule
+        lastRuleIsSet = true
+      } else if (rule.hasDuplicates && !rule.params && !selectorIsComplex) {
+        // grid-template has duplicates and not inside media rule
+        let cloned = gridAreaRule.clone()
+        cloned.removeAll()
+
+        getMSDecls(area, area.row.updateSpan, area.column.updateSpan)
+          .reverse()
+          .forEach(i =>
+            cloned.prepend(
+              Object.assign(i, {
+                raws: {
+                  between: gridArea.raws.between
+                }
+              })
+            )
+          )
+
+        cloned.selectors = changeDuplicateAreaSelectors(
+          cloned.selectors,
+          rule.selectors
+        )
+
+        if (rulesToInsert[lastArea].lastRule) {
+          rulesToInsert[lastArea].lastRule.after(cloned)
+        }
+        rulesToInsert[lastArea].lastRule = cloned
+        lastRuleIsSet = true
+      } else if (
+        rule.hasDuplicates &&
+        !rule.params &&
+        selectorIsComplex &&
+        gridAreaRule.selector.includes(rule.selectors[0])
+      ) {
+        // grid-template has duplicates and not inside media rule
+        // and the selector is complex
+        gridAreaRule.walkDecls(/-ms-grid-(row|column)/, d => d.remove())
+        getMSDecls(area, area.row.updateSpan, area.column.updateSpan)
+          .reverse()
+          .forEach(i =>
+            gridAreaRule.prepend(
+              Object.assign(i, {
+                raws: {
+                  between: gridArea.raws.between
+                }
+              })
+            )
+          )
+      } else if (rule.params) {
+        // grid-template is inside media rule
+        // if we're inside media rule, we need to store prefixed rules
+        // inside rulesToInsert object to be able to preserve the order of media
+        // rules and merge them easily
+        let cloned = gridAreaRule.clone()
+        cloned.removeAll()
+
+        getMSDecls(area, area.row.updateSpan, area.column.updateSpan)
+          .reverse()
+          .forEach(i =>
+            cloned.prepend(
+              Object.assign(i, {
+                raws: {
+                  between: gridArea.raws.between
+                }
+              })
+            )
+          )
+
+        if (rule.hasDuplicates && hasDuplicateName) {
+          cloned.selectors = changeDuplicateAreaSelectors(
+            cloned.selectors,
+            rule.selectors
+          )
+        }
+
+        cloned.raws = rule.node.raws
+
+        if (css.index(rule.node.parent) > gridAreaRuleIndex) {
+          // append the prefixed rules right inside media rule
+          // with grid-template
+          rule.node.parent.append(cloned)
+        } else {
+          // store the rule to insert later
+          rulesToInsert[lastArea][rule.params].push(cloned)
+        }
+
+        // set new rule as last rule ONLY if we didn't set lastRule for
+        // this grid-area before
+        if (!lastRuleIsSet) {
+          rulesToInsert[lastArea].lastRule = gridAreaMedia || gridAreaRule
+        }
+      }
+    }
+
+    return undefined
+  })
+
+  // append stored rules inside the media rules
+  Object.keys(rulesToInsert).forEach(area => {
+    let data = rulesToInsert[area]
+    let lastRule = data.lastRule
+    Object.keys(data)
+      .reverse()
+      .filter(p => p !== 'lastRule')
+      .forEach(params => {
+        if (data[params].length > 0 && lastRule) {
+          lastRule.after({ name: 'media', params })
+          lastRule.next().append(data[params])
+        }
+      })
+  })
+
+  return undefined
+}
+
+/**
+ * Warn user if grid area identifiers are not found
+ * @param  {Object} areas
+ * @param  {Declaration} decl
+ * @param  {Result} result
+ * @return {void}
+ */
+exports.warnMissedAreas = warnMissedAreas
+
+function warnMissedAreas(areas, decl, result) {
+  let missed = Object.keys(areas)
+
+  decl.root().walkDecls('grid-area', gridArea => {
+    missed = missed.filter(e => e !== gridArea.value)
+  })
+
+  if (missed.length > 0) {
+    decl.warn(result, 'Can not find grid areas: ' + missed.join(', '))
+  }
+
+  return undefined
+}
+
+/**
+ * compare selectors with grid-area rule and grid-template rule
+ * show warning if grid-template selector is not found
+ * (this function used for grid-area rule)
+ * @param  {Declaration} decl
+ * @param  {Result} result
+ * @return {void}
+ */
+exports.warnTemplateSelectorNotFound = warnTemplateSelectorNotFound
+
+function warnTemplateSelectorNotFound(decl, result) {
+  let rule = decl.parent
+  let root = decl.root()
+  let duplicatesFound = false
+
+  // slice selector array. Remove the last part (for comparison)
+  let slicedSelectorArr = list
+    .space(rule.selector)
+    .filter(str => str !== '>')
+    .slice(0, -1)
+
+  // we need to compare only if selector is complex.
+  // e.g '.grid-cell' is simple, but '.parent > .grid-cell' is complex
+  if (slicedSelectorArr.length > 0) {
+    let gridTemplateFound = false
+    let foundAreaSelector = null
+
+    root.walkDecls(/grid-template(-areas)?$/, d => {
+      let parent = d.parent
+      let templateSelectors = parent.selectors
+
+      let { areas } = parseTemplate({ decl: d, gap: getGridGap(d) })
+      let hasArea = areas[decl.value]
+
+      // find the the matching selectors
+      for (let tplSelector of templateSelectors) {
+        if (gridTemplateFound) {
+          break
+        }
+        let tplSelectorArr = list.space(tplSelector).filter(str => str !== '>')
+
+        gridTemplateFound = tplSelectorArr.every(
+          (item, idx) => item === slicedSelectorArr[idx]
+        )
+      }
+
+      if (gridTemplateFound || !hasArea) {
+        return true
+      }
+
+      if (!foundAreaSelector) {
+        foundAreaSelector = parent.selector
+      }
+
+      // if we found the duplicate area with different selector
+      if (foundAreaSelector && foundAreaSelector !== parent.selector) {
+        duplicatesFound = true
+      }
+
+      return undefined
+    })
+
+    // warn user if we didn't find template
+    if (!gridTemplateFound && duplicatesFound) {
+      decl.warn(
+        result,
+        'Autoprefixer cannot find a grid-template ' +
+          `containing the duplicate grid-area "${decl.value}" ` +
+          `with full selector matching: ${slicedSelectorArr.join(' ')}`
+      )
+    }
+  }
+}
+
+/**
+ * warn user if both grid-area and grid-(row|column)
+ * declarations are present in the same rule
+ * @param  {Declaration} decl
+ * @param  {Result} result
+ * @return {void}
+ */
+exports.warnIfGridRowColumnExists = warnIfGridRowColumnExists
+
+function warnIfGridRowColumnExists(decl, result) {
+  let rule = decl.parent
+  let decls = []
+  rule.walkDecls(/^grid-(row|column)/, d => {
+    if (
+      !d.prop.endsWith('-end') &&
+      !d.value.startsWith('span') &&
+      !d.prop.endsWith('-gap')
+    ) {
+      decls.push(d)
+    }
+  })
+  if (decls.length > 0) {
+    decls.forEach(d => {
+      d.warn(
+        result,
+        'You already have a grid-area declaration present in the rule. ' +
+          `You should use either grid-area or ${d.prop}, not both`
+      )
+    })
+  }
+
+  return undefined
+}
+
+// Gap utils
+
+exports.getGridGap = getGridGap
+
+function getGridGap(decl) {
+  let gap = {}
+
+  // try to find gap
+  let testGap = /^(grid-)?((row|column)-)?gap$/
+  decl.parent.walkDecls(testGap, ({ prop, value }) => {
+    if (/^(grid-)?gap$/.test(prop)) {
+      let [row, , column] = parser(value).nodes
+
+      gap.row = row && parser.stringify(row)
+      gap.column = column ? parser.stringify(column) : gap.row
+    }
+    if (/^(grid-)?row-gap$/.test(prop)) gap.row = value
+    if (/^(grid-)?column-gap$/.test(prop)) gap.column = value
+  })
+
+  return gap
+}
+
+/**
+ * parse media parameters (for example 'min-width: 500px')
+ * @param  {String} params parameter to parse
+ * @return {}
+ */
+function parseMediaParams(params) {
+  if (!params) {
+    return []
+  }
+  let parsed = parser(params)
+  let prop
+  let value
+
+  parsed.walk(node => {
+    if (node.type === 'word' && /min|max/g.test(node.value)) {
+      prop = node.value
+    } else if (node.value.includes('px')) {
+      value = parseInt(node.value.replace(/\D/g, ''))
+    }
+  })
+
+  return [prop, value]
+}
+
+/**
+ * Compare the selectors and decide if we
+ * need to inherit gap from compared selector or not.
+ * @type {String} selA
+ * @type {String} selB
+ * @return {Boolean}
+ */
+function shouldInheritGap(selA, selB) {
+  let result
+
+  // get arrays of selector split in 3-deep array
+  let splitSelectorArrA = splitSelector(selA)
+  let splitSelectorArrB = splitSelector(selB)
+
+  if (splitSelectorArrA[0].length < splitSelectorArrB[0].length) {
+    // abort if selectorA has lower descendant specificity then selectorB
+    // (e.g '.grid' and '.hello .world .grid')
+    return false
+  } else if (splitSelectorArrA[0].length > splitSelectorArrB[0].length) {
+    // if selectorA has higher descendant specificity then selectorB
+    // (e.g '.foo .bar .grid' and '.grid')
+
+    let idx = splitSelectorArrA[0].reduce((res, [item], index) => {
+      let firstSelectorPart = splitSelectorArrB[0][0][0]
+      if (item === firstSelectorPart) {
+        return index
+      }
+      return false
+    }, false)
+
+    if (idx) {
+      result = splitSelectorArrB[0].every((arr, index) => {
+        return arr.every(
+          (part, innerIndex) =>
+            // because selectorA has more space elements, we need to slice
+            // selectorA array by 'idx' number to compare them
+            splitSelectorArrA[0].slice(idx)[index][innerIndex] === part
+        )
+      })
+    }
+  } else {
+    // if selectorA has the same descendant specificity as selectorB
+    // this condition covers cases such as: '.grid.foo.bar' and '.grid'
+    result = splitSelectorArrB.some(byCommaArr => {
+      return byCommaArr.every((bySpaceArr, index) => {
+        return bySpaceArr.every(
+          (part, innerIndex) => splitSelectorArrA[0][index][innerIndex] === part
+        )
+      })
+    })
+  }
+
+  return result
+}
+/**
+ * inherit grid gap values from the closest rule above
+ * with the same selector
+ * @param  {Declaration} decl
+ * @param  {Object} gap gap values
+ * @return {Object | Boolean} return gap values or false (if not found)
+ */
+exports.inheritGridGap = inheritGridGap
+
+function inheritGridGap(decl, gap) {
+  let rule = decl.parent
+  let mediaRule = getParentMedia(rule)
+  let root = rule.root()
+
+  // get an array of selector split in 3-deep array
+  let splitSelectorArr = splitSelector(rule.selector)
+
+  // abort if the rule already has gaps
+  if (Object.keys(gap).length > 0) {
+    return false
+  }
+
+  // e.g ['min-width']
+  let [prop] = parseMediaParams(mediaRule.params)
+
+  let lastBySpace = splitSelectorArr[0]
+
+  // get escaped value from the selector
+  // if we have '.grid-2.foo.bar' selector, will be '\.grid\-2'
+  let escaped = escapeRegexp(lastBySpace[lastBySpace.length - 1][0])
+
+  let regexp = new RegExp(`(${escaped}$)|(${escaped}[,.])`)
+
+  // find the closest rule with the same selector
+  let closestRuleGap
+  root.walkRules(regexp, r => {
+    let gridGap
+
+    // abort if are checking the same rule
+    if (rule.toString() === r.toString()) {
+      return false
+    }
+
+    // find grid-gap values
+    r.walkDecls('grid-gap', d => (gridGap = getGridGap(d)))
+
+    // skip rule without gaps
+    if (!gridGap || Object.keys(gridGap).length === 0) {
+      return true
+    }
+
+    // skip rules that should not be inherited from
+    if (!shouldInheritGap(rule.selector, r.selector)) {
+      return true
+    }
+
+    let media = getParentMedia(r)
+    if (media) {
+      // if we are inside media, we need to check that media props match
+      // e.g ('min-width' === 'min-width')
+      let propToCompare = parseMediaParams(media.params)[0]
+      if (propToCompare === prop) {
+        closestRuleGap = gridGap
+        return true
+      }
+    } else {
+      closestRuleGap = gridGap
+      return true
+    }
+
+    return undefined
+  })
+
+  // if we find the closest gap object
+  if (closestRuleGap && Object.keys(closestRuleGap).length > 0) {
+    return closestRuleGap
+  }
+  return false
+}
+
+exports.warnGridGap = warnGridGap
+
+function warnGridGap({ decl, gap, hasColumns, result }) {
+  let hasBothGaps = gap.row && gap.column
+  if (!hasColumns && (hasBothGaps || (gap.column && !gap.row))) {
+    delete gap.column
+    decl.warn(
+      result,
+      'Can not implement grid-gap without grid-template-columns'
+    )
+  }
+}
+
+/**
+ * normalize the grid-template-rows/columns values
+ * @param  {String} str grid-template-rows/columns value
+ * @return {Array} normalized array with values
+ * @example
+ * let normalized = normalizeRowColumn('1fr repeat(2, 20px 50px) 1fr')
+ * normalized // <= ['1fr', '20px', '50px', '20px', '50px', '1fr']
+ */
+function normalizeRowColumn(str) {
+  let normalized = parser(str).nodes.reduce((result, node) => {
+    if (node.type === 'function' && node.value === 'repeat') {
+      let key = 'count'
+
+      let [count, value] = node.nodes.reduce(
+        (acc, n) => {
+          if (n.type === 'word' && key === 'count') {
+            acc[0] = Math.abs(parseInt(n.value))
+            return acc
+          }
+          if (n.type === 'div' && n.value === ',') {
+            key = 'value'
+            return acc
+          }
+          if (key === 'value') {
+            acc[1] += parser.stringify(n)
+          }
+          return acc
+        },
+        [0, '']
+      )
+
+      if (count) {
+        for (let i = 0; i < count; i++) {
+          result.push(value)
+        }
+      }
+
+      return result
+    }
+    if (node.type === 'space') {
+      return result
+    }
+    return result.concat(parser.stringify(node))
+  }, [])
+
+  return normalized
+}
+
+exports.autoplaceGridItems = autoplaceGridItems
+
+/**
+ * Autoplace grid items
+ * @param {Declaration} decl
+ * @param {Result} result
+ * @param {Object} gap gap values
+ * @param {String} autoflowValue grid-auto-flow value
+ * @return {void}
+ * @see https://github.com/postcss/autoprefixer/issues/1148
+ */
+function autoplaceGridItems(decl, result, gap, autoflowValue = 'row') {
+  let { parent } = decl
+
+  let rowDecl = parent.nodes.find(i => i.prop === 'grid-template-rows')
+  let rows = normalizeRowColumn(rowDecl.value)
+  let columns = normalizeRowColumn(decl.value)
+
+  // Build array of area names with dummy values. If we have 3 columns and
+  // 2 rows, filledRows will be equal to ['1 2 3', '4 5 6']
+  let filledRows = rows.map((_, rowIndex) => {
+    return Array.from(
+      { length: columns.length },
+      (v, k) => k + rowIndex * columns.length + 1
+    ).join(' ')
+  })
+
+  let areas = parseGridAreas({ gap, rows: filledRows })
+  let keys = Object.keys(areas)
+  let items = keys.map(i => areas[i])
+
+  // Change the order of cells if grid-auto-flow value is 'column'
+  if (autoflowValue.includes('column')) {
+    items = items.sort((a, b) => a.column.start - b.column.start)
+  }
+
+  // Insert new rules
+  items.reverse().forEach((item, index) => {
+    let { column, row } = item
+    let nodeSelector = parent.selectors
+      .map(sel => sel + ` > *:nth-child(${keys.length - index})`)
+      .join(', ')
+
+    // create new rule
+    let node = parent.clone().removeAll()
+
+    // change rule selector
+    node.selector = nodeSelector
+
+    // insert prefixed row/column values
+    node.append({ prop: '-ms-grid-row', value: row.start })
+    node.append({ prop: '-ms-grid-column', value: column.start })
+
+    // insert rule
+    parent.after(node)
+  })
+
+  return undefined
+}