Managing Client‑Side State with the HTML5 LocalStorage API
Learn how to use the HTML5 LocalStorage API for client‑side persistence. This guide covers JSON serialization for objects, storage limits, and critical security warnings.
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Architecting for Safari's Intelligent Tracking Prevention (ITP)
Learn how to handle Safari's Intelligent Tracking Prevention (ITP) using the Storage Access API to prevent session loss and cookie expiration in cross-site contexts.
Safari and Persistent Storage: Using navigator.storage.persist() for Offline Web Apps
Learn how Safari 16+ supports the navigator.storage.persist() API, the steps to request persistent storage, how to verify it, and what limits you need to know before building offline‑first web apps.
Managing Persistent Client‑Side State with HTML5 LocalStorage
Learn how to implement HTML5 LocalStorage for persistent client‑side data. This guide covers JSON serialization, storage limits, and security constraints for managing state without a server.
html5Safari ITP Storage Eviction and Client-Side Cookie Persistence
Intelligent Tracking Prevention (ITP) Storage Caps Safari employs Intelligent Tracking Prevention (ITP) to limit the persistence of client-side storage. A documented behavior involves a 7-day cap on the expiration of cookies set via document.cookie , regardless of the specified Max-Age or Expires attributes. There is a distinction between cookies set via HTT
IndexedDB versionchange transaction rollback consistency across browsers
The HTML5 IndexedDB specification defines the versionchange transaction as an atomic operation. When an error occurs during a schema update, the transaction should abort, leaving the database at its previous version and reverting any structural changes made during that session. In complex migrations involving the creation or deletion of multiple object store
QuotaExceededError thrown inconsistently across browsers when localStorage quota exceeded
Cross-browser QuotaExceededError behavior The HTML5 Web Storage specification defines QuotaExceededError as the failure condition when an origin exceeds its allocated localStorage quota, but leaves the exact quota size and eviction strategy implementation-defined. This creates an unresolved decision about how browsers signal quota exhaustion when setItem wou