IDBTransaction

IndexedDB indexeddb

Baseline: Widely available on the web, in every major browser since Sep 2021, and long enough to count on (since Mar 2024).

niso: Partial 95%. 2929 of 3061 subtests pass, by system: Linux 95%, macOS 95%. Engines: QuickJS, the engine niso's WPT run uses; Node and Porffor have no recorded run. WPT results recorded at f3b4fa8, 2026-11-10; web-features 3.45.0. WPT tests · niso's support · IDBCursor, IDBCursorWithValue, IDBDatabase, IDBFactory

IDBTransaction is an interface in idl/indexeddb.webidl, inheriting EventTarget, exposed in Window, Worker. What it does is on MDN; this page says what niso has of it.

Status

The web features its members belong to, each with its Baseline status on the web and how much of the feature’s WPT suite passes in niso (see Web platform support).

Feature	On the web	In niso	Members
IndexedDB	Widely available	Partial 95% 2929 of 3061 subtests pass	12

Members

objectStoreNames

attribute

readonly attribute DOMStringList objectStoreNames;

int32_t niso_idb_transaction_get_object_store_names(niso_dom* dom, niso_handle self, niso_handle* out);

mode

attribute

readonly attribute IDBTransactionMode mode;

int32_t niso_idb_transaction_get_mode(niso_dom* dom, niso_handle self, niso_str* out);

durability

attribute

readonly attribute IDBTransactionDurability durability;

int32_t niso_idb_transaction_get_durability(niso_dom* dom, niso_handle self, niso_str* out);

db

attribute

[SameObject] readonly attribute IDBDatabase db;

int32_t niso_idb_transaction_get_db(niso_dom* dom, niso_handle self, niso_handle* out);

error

attribute

[NisoGlue] readonly attribute DOMException? error;

objectStore()

operation

IDBObjectStore objectStore(DOMString name);

int32_t niso_idb_transaction_object_store(niso_dom* dom, niso_handle self, const char* name, size_t name_len, niso_handle* out);

commit()

operation

undefined commit();

int32_t niso_idb_transaction_commit(niso_dom* dom, niso_handle self);

abort()

operation

undefined abort();

int32_t niso_idb_transaction_abort(niso_dom* dom, niso_handle self);

onabort

attribute

attribute EventHandler onabort;

int32_t niso_idb_transaction_get_onabort(niso_dom* dom, niso_handle self, void** out);
int32_t niso_idb_transaction_set_onabort(niso_dom* dom, niso_handle self, niso_event_handler_non_null_fn value_fn, void* value_userdata, niso_drop_fn value_drop);

Event handlers:

oncomplete

attribute

attribute EventHandler oncomplete;

int32_t niso_idb_transaction_get_oncomplete(niso_dom* dom, niso_handle self, void** out);
int32_t niso_idb_transaction_set_oncomplete(niso_dom* dom, niso_handle self, niso_event_handler_non_null_fn value_fn, void* value_userdata, niso_drop_fn value_drop);

onerror

attribute

attribute EventHandler onerror;

int32_t niso_idb_transaction_get_onerror(niso_dom* dom, niso_handle self, void** out);
int32_t niso_idb_transaction_set_onerror(niso_dom* dom, niso_handle self, niso_event_handler_non_null_fn value_fn, void* value_userdata, niso_drop_fn value_drop);

errorInfo()

operation not in JS

[NisoInternal] any errorInfo();

int32_t niso_idb_transaction_error_info(niso_dom* dom, niso_handle self, niso_bytes* out);

As IDBRequest’s.

cloning()

operation not in JS

[NisoInternal] undefined cloning(boolean started);

int32_t niso_idb_transaction_cloning(niso_dom* dom, niso_handle self, bool started);

Makes the active transaction inactive while the binding clones a value for it (true), and active again after (false): “clone a value”.

Not in niso yet

Members the web has, by the BCD keys web-features 3.45.0 lists, that idl/ doesn’t declare. The list is partial: web-features lists only the keys it maps to a feature.

• worker_support (IndexedDB)