IndexedDB
IndexedDB is a low-level, client-side NoSQL database API built into web browsers that allows web applications to store and query large amounts of structured data locally. It provides transactional capabilities and supports indexing for efficient data retrieval, enabling offline functionality and improved performance in web apps. Unlike simpler storage options like localStorage, it can handle complex data types and larger datasets.
Developers should learn IndexedDB when building progressive web apps (PWAs) or any web application that requires robust offline capabilities, such as note-taking apps, document editors, or media players. It's essential for scenarios where users need to access and manipulate data without an internet connection, and for caching large datasets like product catalogs or user-generated content to reduce server load and latency.