Simple classNames

cx.js

'use strict';

function cx() {
  var classNames = [];
  var args = Array.prototype.slice.call(arguments);

  args.forEach(function (arg) {
    if (Array.isArray(arg)) {
      classNames = classNames.concat(arg);
    } else if (typeof arg === 'object') {
      for (var prop in arg) {
        if (arg[prop]) {
          classNames.push(prop);
        }
      }
    } else {
      classNames.push(arg.toString());
    }
  });

  return classNames.join(' ');
}

module.exports = cx;