@cjser/has-own-prop

has-own-prop

A safer .hasOwnProperty()

Shortcut for Object.prototype.hasOwnProperty.call(object, property). Also comes with a type guard for TypeScript users.

You shouldn't use .hasOwnProperty() as it won't exist on objects created with Object.create(null) or it can have been overridden.

Install

npm install has-own-prop

Usage

import hasOwnProperty from 'has-own-prop';

const object = Object.create(null);
object.unicorn = true;

object.hasOwnProperty('unicorn');
//=> 'TypeError: undefined is not a function'

hasOwnProperty(object, 'unicorn');
//=> true

cjser

This package is a CommonJS-compatible build generated by cjser for projects that still need require() support. The source version matches the original npm package version, with a cjser prerelease suffix for this generated build. Original repository: https://github.com/sindresorhus/has-own-prop