React componentDidUpdate diff

update-diff.ts

console.log('Rrow update diff:');
console.log('++++++++++++++++++++');
console.log('++++++++++++++++++++');

const now = Object.entries(this.props);
const added = now.filter(([key, val]) => {
  if (prevProps[key] === undefined && val !== undefined) return true;
  if (!isEqual(prevProps[key], val)) {
    console.log(`${key}
      - ${JSON.stringify(prevProps[key])}
      + ${JSON.stringify(val)}`);
  }
  return false;
});
added.forEach(([key, val]) =>
  console.log(`${key}
      + ${JSON.stringify(val)}`),
);