npm and error messages

node_modules/csso/lib/compressor/compress/index.js

@@ -0,0 +1,22 @@
+var walk = require('../../utils/walk.js').all;
+var handlers = {
+    Atrule: require('./Atrule.js'),
+    Attribute: require('./Attribute.js'),
+    Value: require('./Value.js'),
+    Dimension: require('./Dimension.js'),
+    Percentage: require('./Number.js'),
+    Number: require('./Number.js'),
+    String: require('./String.js'),
+    Url: require('./Url.js'),
+    Hash: require('./color.js').compressHex,
+    Identifier: require('./color.js').compressIdent,
+    Function: require('./color.js').compressFunction
+};
+
+module.exports = function(ast) {
+    walk(ast, function(node, item, list) {
+        if (handlers.hasOwnProperty(node.type)) {
+            handlers[node.type].call(this, node, item, list);
+        }
+    });
+};