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export function deepEqual(object1, object2) {  const keys1 = Object.keys(object1);  const keys2 = Object.keys(object2);  if (keys1.length !== keys2.length) {    return false;  }  for (const key of keys1) {    const val1 = object1[key];    const val2 = object2[key];    const areObjects = isObject(val1) && isObject(val2);    if (      areObjects && !deepEqual(val1, val2) ||      !areObjects && val1 !== val2    ) {      return false;    }  }  return true;}
function isObject(object) {  return object != null && typeof object === 'object';}