import Repl from '@/repl/Repl.tsx'; import CodeLink from '@/mdx-components/CodeLink.tsx';

hasIn()

Returns true if the key path is defined in the provided collection.

A functional alternative to collection.hasIn(keypath) which will also work with plain Objects and Arrays.

<Signature code={hasIn(collection, keyPath): boolean;} />

<Repl defaultValue={hasIn({ x: { y: { z: 123 } } }, ['x', 'y', 'z']);} /> <Repl defaultValue={hasIn({ x: { y: { z: 123 } } }, ['x', 'q', 'p']);} />