An empty database in everybody's pocket
summary
IndexedDB is usable now in almost every browser and stores real JavaScript objects, so the demo actually builds a Twilio emoji chat that writes messages into a messages object store, reads them back with a cursor for instant rendering, and keeps an index by updated date for sorted queries. Known pitfalls include the Safari 8/9 bug that drops records with duplicate IDs and the low‑level API, so use wrappers like idb or Dexie or localForage to get promises, bug workarounds, and simpler versioned upgrades.
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chapters (15)
- 0:00Start
- 1:13Problems
- 2:08Poor connectivity
- 2:32Offline Resiliency
- 2:51User experience
- 3:20Progressive Web Apps
- 4:33Cookies
- 5:15LocalStorage
- 8:52Transactional
- 9:05Asynchronous
- 23:01Indexes
- 23:43Upgrades
- 24:52Safari
- 26:01Libraries!
- 30:21Performance
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