shallowEqual with logging

shallowEqual.js

function shallowEqual(objA, objB): boolean {
  if (Object.is(objA, objB)) {
    return true;
  }

  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
    console.log('not object');
    return false;
  }

  const keysA = Object.keys(objA);
  const keysB = Object.keys(objB);

  if (keysA.length !== keysB.length) {
    console.log('keys.length', keysA.length, keysB.length);
    return false;
  }

  // Test for A's keys different from B.
  for (let i = 0; i < keysA.length; i += 1) {
    if (
      !Object.prototype.hasOwnProperty.call(objB, keysA[i]) ||
      !Object.is(objA[keysA[i]], objB[keysA[i]])
    ) {
      console.log(keysA[i], objA[keysA[i]], objB[keysA[i]]);
      return false;
    }
  }

  return true;
}