Fix.

node_modules/cssstyle/lib/properties/clear.js

@@ -0,0 +1,16 @@
+'use strict';
+
+var parseKeyword = require('../parsers').parseKeyword;
+
+var clear_keywords = ['none', 'left', 'right', 'both', 'inherit'];
+
+module.exports.definition = {
+  set: function(v) {
+    this._setProperty('clear', parseKeyword(v, clear_keywords));
+  },
+  get: function() {
+    return this.getPropertyValue('clear');
+  },
+  enumerable: true,
+  configurable: true,
+};