IndexedDB Versioning: The 'upgradeneeded' Gatekeeper
Source: developer.mozilla.orgadvanced
IndexedDB uses a version number to manage schema changes. Incrementing the version in `indexedDB.open()` triggers a special `upgradeneeded` event, which is the only context where you can create or modify object stores and indexes.
IndexedDB uses a version number to manage schema changes, not just to track versions. Incrementing this number in `indexedDB.open()` triggers a special `upgradeneeded` event, which provides the only context where you can create or modify object stores and indexes. The biggest footgun is trying to alter the schema outside this specific handler; it will always fail.
Read the original → developer.mozilla.org
- #indexeddb
- #web apis
- #storage
- #javascript
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