killa/dist/esm/utils/deep-equals.js

State management for Vanilla and React

const isObject = (object) => {
  return object !== null && typeof object === "object";
};
const deepEquals = (typeA, typeB) => {
  if (!isObject(typeA) && !isObject(typeB) && Object.is(typeA, typeB)) {
    return true;
  }
  if (typeA instanceof Date && typeB instanceof Date) {
    return Object.is(typeA.getTime(), typeB.getTime());
  }
  if (!isObject(typeA) || typeA === null || !isObject(typeB) || typeB === null) {
    return false;
  }
  if (typeA instanceof Map && typeB instanceof Map) {
    if (typeA.size !== typeB.size) {
      return false;
    }
    for (const item of typeA) {
      const key = item[0];
      const value = item[1];
      if (!Object.is(value, typeB.get(key))) {
        return deepEquals(value, typeB.get(key));
      }
    }
    return true;
  }
  if (typeA instanceof Set && typeB instanceof Set) {
    if (typeA.size !== typeB.size) {
      return false;
    }
    return deepEquals([...typeA.values()], [...typeB.values()]);
  }
  const keysA = Object.keys(typeA);
  const keysB = Object.keys(typeB);
  if (keysA.length !== keysB.length) {
    return false;
  }
  for (const key of keysA) {
    const valueA = typeA[key];
    const valueB = typeB[key];
    const areObjects = isObject(valueA) && isObject(valueB);
    if (areObjects && !deepEquals(valueA, valueB) || !areObjects && !Object.is(valueA, valueB)) {
      return false;
    }
  }
  return true;
};
export {
  deepEquals,
  isObject
};