v141 · indexeddb

Bulk Export / Import

getAllRecords() is the natural fit for database snapshots: one call returns every key–value pair ready for JSON serialisation. Import flows can bulk-insert the JSON back with a single transaction. No cursor loop, no accumulation boilerplate.

Feature detection: checking…

A 200-record contacts database is seeded automatically. Export it to JSON, edit the snapshot, and import it back. Each step shows the exact API call used.

database state

contacts store
Records: —
Indexes: —
Store: contacts · keyPath: id
last operation
No operation yet.

export

import

Drop a JSON file here or click to select · must match export format 
// Export: getAllRecords() → JSON (Chrome 141)
async function exportDB(db) {
  const tx      = db.transaction('contacts', 'readonly');
  const store   = tx.objectStore('contacts');
  const records = await store.getAllRecords();
  return JSON.stringify({ version: 1, records });
}

// Import: JSON → bulk put in one transaction
async function importDB(db, json) {
  const { records } = JSON.parse(json);
  const tx    = db.transaction('contacts', 'readwrite');
  const store = tx.objectStore('contacts');
  for (const { key, value } of records) {
    store.put(value);          // key is embedded in value.id
  }
  await new Promise((res, rej) => {
    tx.oncomplete = res;
    tx.onerror    = e => rej(e.target.error);
  });
}

see also