object.hasown (original) (raw)

1.1.4 • Public • Published a year ago

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object.hasown

An ES spec-compliant Object.hasOwn shim. Invoke its "shim" method to shim Object.hasOwn if it is unavailable or noncompliant.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.

Most common usage:

var assert = require('assert'); var hasOwn = require('object.hasown');

var obj = { a: 1, b: 2 };

assert(hasOwn(obj, 'a')); assert(hasOwn(obj, 'b')); assert('toString' in obj && !hasOwn(obj, 'toString'));

if (!Object.hasOwn) { hasOwn.shim(); }

assert.deepEqual(Object.hasOwn(obj, 'a'), hasOwn(obj, 'a'));

Tests

Simply clone the repo, npm install, and run npm test