Package Exports
- has-own-property-x
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Readme
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:
TypeErrorIf object is null or undefined.
| Param | Type | Description |
|---|---|---|
| object | Object |
The object to test. |
| property | string | Symbol |
The name or Symbol of the property to test. |
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