How can I use Recoil in a TypeScript project?

How can I use Recoil in a TypeScript project?

To use Recoil in a TypeScript project, first install Recoil using npm or yarn. Then, set up your RecoilRoot in your app.

What are atoms and selectors in Recoil?

Atoms are units of state in Recoil, while selectors are pure functions that derive state from atoms or other selectors.

Can you show me a simple example of an atom?

Sure! Here's a simple atom example:

import { atom } from 'recoil';

export const countState = atom<number>({
  key: 'countState', // unique ID (with respect to other atoms/selectors)
  default: 0, // default value (aka initial value)
});

How do I use selectors to derive state?

You can create a selector like this:

import { selector } from 'recoil';
import { countState } from './countState';

export const doubledCountState = selector({
  key: 'doubledCountState',
  get: ({ get }) => {
    const count = get(countState);
    return count * 2;
  },
});