getAllLocalStorageItems

1/**
2 * Returns all key-value pairs from localStorage.
3 *
4 * @returns An object where keys are localStorage keys and values are parsed if possible.
5 */
6export function getAllLocalStorageItems(): Record<string, any> {
7  const result: Record<string, any> = {};
8
9  for (let i = 0; i < localStorage.length; i++) {
10    const key = localStorage.key(i);
11    if (key === null) continue;
12
13    const item = localStorage.getItem(key);
14    try {
15      result[key] = JSON.parse(item!);
16    } catch {
17      result[key] = item;
18    }
19  }
20
21  return result;
22}

1beforeEach(() => {
2  localStorage.clear();
3});
4
5test('returns empty object when localStorage is empty', () => {
6  expect(getAllLocalStorageItems()).toEqual({});
7});
8
9test('returns all key-value pairs with parsed values', () => {
10  localStorage.setItem('num', JSON.stringify(1));
11  localStorage.setItem('str', JSON.stringify('test'));
12  localStorage.setItem('obj', JSON.stringify({ x: true }));
13
14  const items = getAllLocalStorageItems();
15
16  expect(items).toEqual({
17    num: 1,
18    str: 'test',
19    obj: { x: true },
20  });
21});
22
23test('returns raw string if JSON.parse fails', () => {
24  localStorage.setItem('bad', 'notjson');
25
26  const items = getAllLocalStorageItems();
27
28  expect(items.bad).toBe('notjson');
29});