reflect.getprototypeof (1.0.10)
Published 2026-02-24 14:04:10 +00:00 by atheaadmin
Installation
registry=npm install reflect.getprototypeof@1.0.10"reflect.getprototypeof": "1.0.10"About this package
reflect.getprototypeof 
An ES2015 mostly-spec-compliant Reflect.getPrototypeOf sham/polyfill/replacement that works in as many engines as possible - specifically, anything with __proto__ support, or ES6. Built-in types will also work correctly in older engines.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Example
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);
Tests
Simply clone the repo, npm install, and run npm test
Dependencies
Dependencies
| ID | Version |
|---|---|
| call-bind | ^1.0.8 |
| define-properties | ^1.2.1 |
| es-abstract | ^1.23.9 |
| es-errors | ^1.3.0 |
| es-object-atoms | ^1.0.0 |
| get-intrinsic | ^1.2.7 |
| get-proto | ^1.0.1 |
| which-builtin-type | ^1.2.1 |
Development Dependencies
| ID | Version |
|---|---|
| @es-shims/api | ^2.5.1 |
| @ljharb/eslint-config | ^21.1.1 |
| auto-changelog | ^2.5.0 |
| encoding | ^0.1.13 |
| eslint | =8.8.0 |
| evalmd | ^0.0.19 |
| functions-have-names | ^1.2.3 |
| in-publish | ^2.0.1 |
| npmignore | ^0.3.1 |
| nyc | ^10.3.2 |
| safe-publish-latest | ^2.0.0 |
| tape | ^5.9.0 |
Keywords
Reflect.getPrototypeOf
Object.getPrototypeOf
proto
__proto__
[[Prototype]]
getPrototypeOf
ES5
shim
polyfill
es-shim API
browser