hasOwnProperty | /_util/has_own_property.ts | std@0.63.0

function hasOwnProperty

import { hasOwnProperty } from "https://deno.land/std@0.63.0/_util/has_own_property.ts";

hasOwnProperty<T>(obj: T, v: PropertyKey): boolean

Determines whether an object has a property with the specified name. Avoid calling prototype builtin hasOwnProperty for two reasons:

hasOwnProperty is defined on the object as something else:

const options = { ending: 'utf8', hasOwnProperty: 'foo' }; options.hasOwnProperty('ending') // throws a TypeError
The object doesn't inherit from Object.prototype:

const options = Object.create(null); options.ending = 'utf8'; options.hasOwnProperty('ending'); // throws a TypeError

Type Parameters

obj: T

A Object.

v: PropertyKey

A property name.

boolean