val 0.7.0

An arbitrary precision calculator language
Documentation 
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import { useEffect, useState } from 'react';

export function usePersistedDoc(
  key: string,
  fallback: string
): [string, (value: string) => void] {
  const [value, setValue] = useState<string>(() => {
    const stored = window.localStorage.getItem(key);

    return stored ?? fallback;
  });

  useEffect(() => {
    window.localStorage.setItem(key, value);
  }, [key, value]);

  return [value, setValue];
}