Storage

Generated from idl/html.webidl when the site was built at 7aa23e2.

Storage is an interface in idl/html.webidl, exposed in Window. What it does is on MDN; this page says what niso has of it.

The standard declares getItem, setItem and removeItem as the named property getter, setter and deleter; niso-idl takes named properties as anonymous operations, so they appear twice.

Platform notes

Web Storage runs on the storage driver, SQLite by default, which a host can replace (docs/storage.md). A native app’s document is at about:blank with the app’s origin, https://<app>.app.niso, so its storage is per app.

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
localStorage and sessionStorage	Widely available	Partial 95% 1239 of 1291 subtests pass	7

Members

length

attribute

readonly attribute unsigned long length;

int32_t niso_storage_get_length(niso_dom* dom, niso_handle self, uint32_t* out);

key()

operation

DOMString? key(unsigned long index);

int32_t niso_storage_key(niso_dom* dom, niso_handle self, uint32_t index, niso_str* out);

getItem()

operation

DOMString? getItem(DOMString key);

int32_t niso_storage_get_item(niso_dom* dom, niso_handle self, const char* key, size_t key_len, niso_str* out);

setItem()

operation

undefined setItem(DOMString key, DOMString value);

int32_t niso_storage_set_item(niso_dom* dom, niso_handle self, const char* key, size_t key_len, const char* value, size_t value_len);

removeItem()

operation

undefined removeItem(DOMString key);

int32_t niso_storage_remove_item(niso_dom* dom, niso_handle self, const char* key, size_t key_len);

clear()

operation

undefined clear();

int32_t niso_storage_clear(niso_dom* dom, niso_handle self);

getter

operation

getter DOMString? (DOMString key);

setter

operation

setter undefined (DOMString key, DOMString value);

deleter

operation

deleter undefined (DOMString key);