has-own-property-x

has-own-property-x

Used to determine whether an object has an own property with the specified property key.

module.exports(object, property) ⇒ boolean ⏏

The hasOwnProperty method returns a boolean indicating whether the object has the specified property. Does not attempt to fix known issues in older browsers, but does ES6ify the method.

Kind: Exported function
Returns: boolean - true if the property is set on object, else false.
Throws:

• TypeError If object is null or undefined.

Example

import hasOwnProperty from 'has-own-property-x';

const o = {
  foo: 'bar',
};

console.log(hasOwnProperty(o, 'bar')); // false
console.log(hasOwnProperty(o, 'foo')); // true
hasOwnProperty(undefined, 'foo'); // TypeError: Cannot convert undefined or null to object