dewedev/node_modules/core-js/internals/define-built-in.js

'use strict';
var isCallable = require('../internals/is-callable');
var definePropertyModule = require('../internals/object-define-property');
var makeBuiltIn = require('../internals/make-built-in');
var defineGlobalProperty = require('../internals/define-global-property');

module.exports = function (O, key, value, options) {
  if (!options) options = {};
  var simple = options.enumerable;
  var name = options.name !== undefined ? options.name : key;
  if (isCallable(value)) makeBuiltIn(value, name, options);
  if (options.global) {
    if (simple) O[key] = value;
    else defineGlobalProperty(key, value);
  } else {
    try {
      if (!options.unsafe) delete O[key];
      else if (O[key]) simple = true;
    } catch (error) { /* empty */ }
    if (simple) O[key] = value;
    else definePropertyModule.f(O, key, {
      value: value,
      enumerable: false,
      configurable: !options.nonConfigurable,
      writable: !options.nonWritable
    });
  } return O;
};