reflect.getprototypeof

    1.0.2 • Public • Published

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    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

    Install

    npm i reflect.getprototypeof

    DownloadsWeekly Downloads

    23,496

    Version

    1.0.2

    License

    MIT

    Unpacked Size

    17.9 kB

    Total Files

    18

    Last publish

    Collaborators

    • ljharb