反射. 获得原型 
ES2015 基本符合规格 Reflect.getPrototypeOf 在尽可能多的发动机中工作的假/多填/替换 -- -- 具体来说,任何与 __proto__ 支持,或ES6。 内置型号也会在更老的发动机中正确工作.
此软件包执行 希姆・API 接口。 它在ES3支持的环境中工作并遵守 光谱。 。 。 .
示例
var getPrototypeOf = require('reflect.getprototypeof');
var assert = require('assert');
assert.throws(() => getPrototypeOf(true));
assert.throws(() => getPrototypeOf(42));
assert.throws(() => getPrototypeOf(''));
assert.equal(getPrototypeOf(/a/g), RegExp.prototype);
assert.equal(getPrototypeOf(new Date()), Date.prototype);
assert.equal(getPrototypeOf(function () {}), Function.prototype);
assert.equal(getPrototypeOf([]), Array.prototype);
assert.equal(getPrototypeOf({}), Object.prototype);
var getPrototypeOf = require('reflect.getprototypeof');
var assert = require('assert');
/* when Reflect or Reflect.getPrototypeOf is not present */
if (typeof Reflect === 'object') { delete Reflect.getPrototypeOf; }
delete globalThis.Reflect;
var shimmed = getPrototypeOf.shim();
assert.equal(shimmed, getPrototypeOf.getPolyfill());
assert.throws(() => Reflect.getPrototypeOf(true));
assert.throws(() => Reflect.getPrototypeOf(42));
assert.throws(() => Reflect.getPrototypeOf(''));
assert.equal(Reflect.getPrototypeOf(/a/g), RegExp.prototype);
assert.equal(Reflect.getPrototypeOf(new Date()), Date.prototype);
assert.equal(Reflect.getPrototypeOf(function () {}), Function.prototype);
assert.equal(Reflect.getPrototypeOf([]), Array.prototype);
assert.equal(Reflect.getPrototypeOf({}), Object.prototype);
var getPrototypeOf = require('reflect.getprototypeof');
var assert = require('assert');
/* when Reflect.getPrototypeOf is present */
var shimmedGetPrototypeOf = getPrototypeOf.shim();
assert.equal(shimmedGetPrototypeOf, Reflect.getPrototypeOf);
assert.equal(Reflect.getPrototypeOf([]), Array.prototype);
测试
仅仅复制回转, npm install运行 npm test