Function isKeyOfObject

Utility for checking if a key exists in an object. Note this is a type guard, and will inform typescript that the key definitely exists in that object.

This uses Object.hasOwn, which only checks for keys that exist as it's own property, not inherited properties.

Returns

a boolean indicating whether the key exists

Example

isKeyOfObject('name', { name: 'John' }) === true

Example

isKeyOfObject('toString', { name: 'John' }) === false

Example

isKeyOfObject('age', { name: 'John' }) === false

See

MDN reference for Object.hasOwn