flow like the river

VISUALIZACION/node_modules/autoprefixer/lib/hacks/background-size.js

@@ -0,0 +1,32 @@
+(function() {
+  var BackgroundSize, Declaration,
+    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
+    hasProp = {}.hasOwnProperty;
+
+  Declaration = require('../declaration');
+
+  BackgroundSize = (function(superClass) {
+    extend(BackgroundSize, superClass);
+
+    function BackgroundSize() {
+      return BackgroundSize.__super__.constructor.apply(this, arguments);
+    }
+
+    BackgroundSize.names = ['background-size'];
+
+    BackgroundSize.prototype.set = function(decl, prefix) {
+      var value;
+      value = decl.value.toLowerCase();
+      if (prefix === '-webkit-' && value.indexOf(' ') === -1 && value !== 'contain' && value !== 'cover') {
+        decl.value = decl.value + ' ' + decl.value;
+      }
+      return BackgroundSize.__super__.set.call(this, decl, prefix);
+    };
+
+    return BackgroundSize;
+
+  })(Declaration);
+
+  module.exports = BackgroundSize;
+
+}).call(this);