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The update() method of the IDBCursor interface returns an IDBRequest object, and, in a separate thread, updates the value at the current position of the cursor in the object store. If the cursor points to a record that has just been deleted, a new record is created.
API Database IDBCursor IndexedDB Method Reference Storage storage update Update


The update method of the ServiceWorkerRegistration interface attempts to update the service worker. It fetches the worker's script URL, and if the new worker is not byte-by-byte identical to the current worker, it installs the new worker. The fetch of the worker bypasses any browser caches if the previous fetch occurred over 24 hours ago.
API Method Reference Service Workers ServiceWorkerRegistration Update update


The HTMLFormControlsCollection interface represents a collection of HTML form control elements. It replaces one method of HTMLCollection.
API HTML DOM Interface NeedsHTML5Update Reference Référence