prepack/lib/intrinsics/ecma262/global.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;

var _invariant = _interopRequireDefault(require("../../invariant.js"));

var _descriptors = require("../../descriptors.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Copyright (c) 2017-present, 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.
 */

/*  strict-local */
function _default(realm) {
  let global = realm.$GlobalObject;
  global.$DefineOwnProperty("global", new _descriptors.PropertyDescriptor({
    value: global,
    writable: true,
    enumerable: false,
    configurable: true
  }));

  for (let name of ["undefined", "NaN", "Infinity"]) {
    global.$DefineOwnProperty(name, new _descriptors.PropertyDescriptor({
      value: realm.intrinsics[name],
      writable: false,
      enumerable: false,
      configurable: false
    }));
  }

  let typeNames = ["String", "Object", "Function", "Array", "Number", "RegExp", "Date", "Math", "Error", "Function", "TypeError", "RangeError", "ReferenceError", "SyntaxError", "URIError", "EvalError", "Boolean", "DataView", "Float32Array", "Float64Array", "Int8Array", "Int16Array", "Int32Array", "Map", "Set", "WeakMap", "Uint8Array", "Uint8ClampedArray", "Uint16Array", "Uint32Array", "ArrayBuffer", "JSON"];
  if (!realm.isCompatibleWith(realm.MOBILE_JSC_VERSION) && !realm.isCompatibleWith("mobile")) typeNames = typeNames.concat("Symbol", "Promise", "WeakSet", "Proxy", "Reflect");

  for (let name of typeNames) {
    // need to check if the property exists (it may not due to --compatibility)
    if (realm.intrinsics[name]) {
      global.$DefineOwnProperty(name, new _descriptors.PropertyDescriptor({
        value: realm.intrinsics[name],
        writable: true,
        enumerable: false,
        configurable: true
      }));
    } else {
      (0, _invariant.default)(name === "Symbol" || name === "Promise" || name === "WeakSet" || name === "Proxy" || name === "Reflect");
      (0, _invariant.default)(realm.isCompatibleWith(realm.MOBILE_JSC_VERSION) || realm.isCompatibleWith("mobile"));
    }
  }

  for (let name of ["parseFloat", "parseInt", "console", "isNaN", "eval", "isFinite", "encodeURI", "decodeURI", "encodeURIComponent", "decodeURIComponent"]) {
    global.$DefineOwnProperty(name, new _descriptors.PropertyDescriptor({
      value: realm.intrinsics[name],
      writable: true,
      enumerable: false,
      configurable: true
    }));
  }
}
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