PouchDBCouchDB

PouchDBCouchDB is a term used to describe the interoperability between PouchDB, a JavaScript database that runs in browsers and Node.js, and Apache CouchDB, a server-side NoSQL database. It encompasses approaches that allow applications to store data locally with PouchDB and synchronize or replicate that data with a CouchDB server, leveraging CouchDB’s HTTP API and MVCC features.

In practice, PouchDBCouchDB relies on the replication and synchronization mechanisms provided by PouchDB to connect to a remote CouchDB instance. Developers typically create a local PouchDB database and a corresponding remote CouchDB database, then use sync or replicate functions to keep the two in harmony. This setup supports offline-first workflows, where changes made while offline are later synchronized when connectivity is restored. Data formats are JSON documents with optional attachments, and design documents define views and indexes on the server for querying.

Key features include two-way synchronization, conflict awareness and resolution strategies, attachment support, and seamless handling of design documents for indexing. Security considerations involve CouchDB’s authentication and authorization model, as well as cross-origin resource sharing when the remote server is accessed from a web client.

Common use cases involve mobile and web applications that need offline capability and real-time collaboration across distributed clients. Setup generally requires creating a local PouchDB database and connecting it to a remote CouchDB database, then invoking sync or replicate operations. Example: var local = new PouchDB('localdb'); var remote = new PouchDB('http://server:5984/remotedb'); PouchDB.sync(local, remote).then(...). See also PouchDB, CouchDB, and database replication.