All files / libs shallowDiff.ts

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const shallowDiff = (
  firstState: { [key: string]: unknown },
  secondState: { [key: string]: unknown },
) => {
  let diff = Object.keys(firstState).some((key) => {
    const value = firstState[key];
    if (secondState[key] === undefined) {
      return key;
    } else if (JSON.stringify(secondState[key]) !== JSON.stringify(value)) {
      return key;
    }
  });
 
  if (!diff) {
    diff = Object.keys(secondState).some((key) => {
      if (firstState[key] === undefined) {
        return key;
      }
    });
  }
 
  return diff;
};
 
export { shallowDiff as default };