Skip to main content

isRecoilValue(value)

Returns true if value is either an atom or selector and false otherwise.

function isRecoilValue(value: mixed): boolean

Example

import {atom, selector, isRecoilValue} from 'recoil';

const counter = atom({
  key: 'myCounter',
  default: 0,
});

const strCounter = selector({
  key: 'myCounterStr',
  get: ({get}) => String(get(counter)),
});

isRecoilValue(counter); // true
isRecoilValue(strCounter); // true

isRecoilValue(5); // false
isRecoilValue({}); // false

Example