Web Storage (localStorage, sessionStorage, cookies)

What is the purpose of this utility function?

const storageAvailable = (type) => {
  try {
    const storage = window[type];
    const x = '__storage_test__';
    storage.setItem(x, x);
    storage.removeItem(x);
    return true;
  } catch (e) {
    return e instanceof DOMException && (
      e.code === 22 ||
      e.code === 1014 ||
      e.name === 'QuotaExceededError' ||
      e.name === 'NS_ERROR_DOM_QUOTA_REACHED'
    ) && storage?.length !== 0;
  }
};

To clear storage
To check if Web Storage is supported and available
This utility function checks if Web Storage is supported and available: 1) It attempts to write and remove a test item to verify storage functionality, 2) It handles various browser-specific error codes and messages, 3) It detects if storage is disabled or unavailable, 4) It works for both localStorage and sessionStorage, 5) It catches quota errors separately from general availability, 6) The function is important for progressive enhancement and fallback strategies, 7) It helps prevent runtime errors when storage is unavailable, 8) This is a robust way to feature-detect storage availability before use.
To measure storage capacity
To encrypt storage data

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