has-own-prop
TypeScript icon, indicating that this package has built-in type declarations

3.1.0 • Public • Published

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

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Install

npm i has-own-prop

Weekly Downloads

2,713,030

Version

3.1.0

License

MIT

Unpacked Size

2.97 kB

Total Files

5

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Collaborators

  • sindresorhus