@tanstack/persister/dist/esm/compare.js

Utilities for persisting state to local storage, session storage, indexedDB, and more.

function replaceEqualDeep(a, b) {
  if (a === b) {
    return a;
  }
  const array = isPlainArray(a) && isPlainArray(b);
  if (array || isPlainObject(a) && isPlainObject(b)) {
    const aItems = array ? a : Object.keys(a);
    const aSize = aItems.length;
    const bItems = array ? b : Object.keys(b);
    const bSize = bItems.length;
    const copy = array ? [] : {};
    let equalItems = 0;
    for (let i = 0; i < bSize; i++) {
      const key = array ? i : bItems[i];
      if ((!array && aItems.includes(key) || array) && a[key] === void 0 && b[key] === void 0) {
        copy[key] = void 0;
        equalItems++;
      } else {
        copy[key] = replaceEqualDeep(a[key], b[key]);
        if (copy[key] === a[key] && a[key] !== void 0) {
          equalItems++;
        }
      }
    }
    return aSize === bSize && equalItems === aSize ? a : copy;
  }
  return b;
}
function shallowEqualObjects(a, b) {
  if (!b || Object.keys(a).length !== Object.keys(b).length) {
    return false;
  }
  for (const key in a) {
    if (a[key] !== b[key]) {
      return false;
    }
  }
  return true;
}
function isPlainArray(value) {
  return Array.isArray(value) && value.length === Object.keys(value).length;
}
function isPlainObject(o) {
  if (!hasObjectPrototype(o)) {
    return false;
  }
  const ctor = o.constructor;
  if (ctor === void 0) {
    return true;
  }
  const prot = ctor.prototype;
  if (!hasObjectPrototype(prot)) {
    return false;
  }
  if (!prot.hasOwnProperty("isPrototypeOf")) {
    return false;
  }
  if (Object.getPrototypeOf(o) !== Object.prototype) {
    return false;
  }
  return true;
}
function hasObjectPrototype(o) {
  return Object.prototype.toString.call(o) === "[object Object]";
}
export {
  isPlainArray,
  isPlainObject,
  replaceEqualDeep,
  shallowEqualObjects
};
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