prefer-object-has-own.md

Prefer Object.hasOwn(…) over Object.prototype.hasOwnProperty.call(…)

Object.hasOwn(…) is more accessible than Object.prototype.hasOwnProperty.call(…).

This rule is fixable.

Fail

const hasProperty = Object.prototype.hasOwnProperty.call(object, property);

const hasProperty = {}.hasOwnProperty.call(object, property);

const hasProperty = lodash.has(object, property);

Pass

const hasProperty = Object.hasOwn(object, property);

Options

Type: object

functions

Type: string[]

You can also check custom functions that indicating the object has the specified property as its own property.

_.has(), lodash.has(), and underscore.has() are checked by default.

Example:

{
	'unicorn/prefer-object-has-own': [
		'error',
		{
			functions: [
				'has',
				'utils.has',
			]
		}
	]
}

// eslint unicorn/prefer-object-has-own: ["error", {"functions": ["utils.has"]}]
const hasProperty = utils.has(object, property); // Fails