traceur/src/runtime/runtime.js

ES6 to ES5 compiler

// Copyright 2012 Traceur Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * The traceur runtime.
 */
(function(global) {
  'use strict';

  if (global.$traceurRuntime) {
    // Prevents from being executed multiple times.
    return;
  }

  function setupGlobals(global) {
    global.Reflect = global.Reflect || {};
    global.Reflect.global = global.Reflect.global || global;
  }
  setupGlobals(global);

  // This may get overridden in symbols.js to handle emulated symbols.
  var typeOf = x => typeof x;

  global.$traceurRuntime = {
    options: {},
    setupGlobals: setupGlobals,
    typeof: typeOf,
  };
})(typeof window !== 'undefined' ? window :
    typeof global !== 'undefined' ? global :
    typeof self !== 'undefined' ? self : this);