The Problem

I was using Jotai. I created an atom and used useSetAtom to only receive the function that modifies the value but I was getting a TypeScript error.

The Fix

The useSetAtom function only accepted WritableAtom and my atom was just Atom. I googled it and found the fix, initializing with false. If an atom is initialized with null or undefined, It won’t be a WritableAtom.

// This is a WritableAtom
const myAtom = atom(false)

// This is NOT a WritableAtom
const notMyAtom = atom(null)