Index: node_modules/autoprefixer/lib/hacks/grid-rows-columns.js
===================================================================
--- node_modules/autoprefixer/lib/hacks/grid-rows-columns.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/autoprefixer/lib/hacks/grid-rows-columns.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,125 @@
+let Declaration = require('../declaration')
+let Processor = require('../processor')
+let {
+  autoplaceGridItems,
+  getGridGap,
+  inheritGridGap,
+  prefixTrackProp,
+  prefixTrackValue
+} = require('./grid-utils')
+
+class GridRowsColumns extends Declaration {
+  insert(decl, prefix, prefixes, result) {
+    if (prefix !== '-ms-') return super.insert(decl, prefix, prefixes)
+
+    let { parent, prop, value } = decl
+    let isRowProp = prop.includes('rows')
+    let isColumnProp = prop.includes('columns')
+
+    let hasGridTemplate = parent.some(
+      i => i.prop === 'grid-template' || i.prop === 'grid-template-areas'
+    )
+
+    /**
+     * Not to prefix rows declaration if grid-template(-areas) is present
+     */
+    if (hasGridTemplate && isRowProp) {
+      return false
+    }
+
+    let processor = new Processor({ options: {} })
+    let status = processor.gridStatus(parent, result)
+    let gap = getGridGap(decl)
+    gap = inheritGridGap(decl, gap) || gap
+
+    let gapValue = isRowProp ? gap.row : gap.column
+
+    if ((status === 'no-autoplace' || status === true) && !hasGridTemplate) {
+      gapValue = null
+    }
+
+    let prefixValue = prefixTrackValue({
+      gap: gapValue,
+      value
+    })
+
+    /**
+     * Insert prefixes
+     */
+    decl.cloneBefore({
+      prop: prefixTrackProp({ prefix, prop }),
+      value: prefixValue
+    })
+
+    let autoflow = parent.nodes.find(i => i.prop === 'grid-auto-flow')
+    let autoflowValue = 'row'
+
+    if (autoflow && !processor.disabled(autoflow, result)) {
+      autoflowValue = autoflow.value.trim()
+    }
+    if (status === 'autoplace') {
+      /**
+       * Show warning if grid-template-rows decl is not found
+       */
+      let rowDecl = parent.nodes.find(i => i.prop === 'grid-template-rows')
+
+      if (!rowDecl && hasGridTemplate) {
+        return undefined
+      } else if (!rowDecl && !hasGridTemplate) {
+        decl.warn(
+          result,
+          'Autoplacement does not work without grid-template-rows property'
+        )
+        return undefined
+      }
+
+      /**
+       * Show warning if grid-template-columns decl is not found
+       */
+      let columnDecl = parent.nodes.find(i => {
+        return i.prop === 'grid-template-columns'
+      })
+      if (!columnDecl && !hasGridTemplate) {
+        decl.warn(
+          result,
+          'Autoplacement does not work without grid-template-columns property'
+        )
+      }
+
+      /**
+       * Autoplace grid items
+       */
+      if (isColumnProp && !hasGridTemplate) {
+        autoplaceGridItems(decl, result, gap, autoflowValue)
+      }
+    }
+
+    return undefined
+  }
+
+  /**
+   * Change IE property back
+   */
+  normalize(prop) {
+    return prop.replace(/^grid-(rows|columns)/, 'grid-template-$1')
+  }
+
+  /**
+   * Change property name for IE
+   */
+  prefixed(prop, prefix) {
+    if (prefix === '-ms-') {
+      return prefixTrackProp({ prefix, prop })
+    }
+    return super.prefixed(prop, prefix)
+  }
+}
+
+GridRowsColumns.names = [
+  'grid-template-rows',
+  'grid-template-columns',
+  'grid-rows',
+  'grid-columns'
+]
+
+module.exports = GridRowsColumns