IndexedDB
IndexedDB is a low-level API for client-side storage of significant amounts of structured data, including files and blobs, in web browsers. It enables web applications to store data locally for offline functionality, improved performance, and enhanced user experiences. Unlike simpler storage options like localStorage, it supports complex queries, transactions, and large datasets.
Developers should learn IndexedDB when building progressive web apps (PWAs) or offline-first applications that require robust client-side data storage, such as note-taking apps, email clients, or media players. It is essential for scenarios where applications need to handle large datasets (e.g., thousands of records) or support complex operations like indexing and transactions without relying on server connectivity.