react app

react-app/node_modules/react/lib/joinClasses.js

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+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule joinClasses
+ * @typechecks static-only
+ */
+
+'use strict';
+
+/**
+ * Combines multiple className strings into one.
+ * http://jsperf.com/joinclasses-args-vs-array
+ *
+ * @param {...?string} classes
+ * @return {string}
+ */
+function joinClasses(className/*, ... */) {
+  if (!className) {
+    className = '';
+  }
+  var nextClass;
+  var argLength = arguments.length;
+  if (argLength > 1) {
+    for (var ii = 1; ii < argLength; ii++) {
+      nextClass = arguments[ii];
+      if (nextClass) {
+        className = (className ? className + ' ' : '') + nextClass;
+      }
+    }
+  }
+  return className;
+}
+
+module.exports = joinClasses;