react-bootstrap/lib/utils/joinClasses.js

Bootstrap 3 components build with React

/**
 * Copyright 2013-2014, Facebook, Inc.
 * All rights reserved.
 *
 * This file contains an unmodified version of:
 * https://github.com/facebook/react/blob/v0.12.0/src/utils/joinClasses.js
 *
 * This source code is licensed under the BSD-style license found here:
 * https://github.com/facebook/react/blob/v0.12.0/LICENSE
 * An additional grant of patent rights can be found here:
 * https://github.com/facebook/react/blob/v0.12.0/PATENTS
 */

"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;