packages/node_modules/pouchdb-adapter-idb/src/getAll.js

// simple shim for objectStore.getAll(), falling back to IDBCursor
function getAll(objectStore, keyRange, onSuccess) {
  if (typeof objectStore.getAll === 'function') {
    // use native getAll
    objectStore.getAll(keyRange).onsuccess = onSuccess;
    return;
  }
  // fall back to cursors
  var values = [];

  function onCursor(e) {
    var cursor = e.target.result;
    if (cursor) {
      values.push(cursor.value);
      cursor.continue();
    } else {
      onSuccess({
        target: {
          result: values
        }
      });
    }
  }

  objectStore.openCursor(keyRange).onsuccess = onCursor;
}

export default getAll;