HTML5: Your visual blueprint™ for designing rich web pages and applications

DELETE AN OBJECT USING THE INDEXEDDB API

You can delete an object from an IndexedDB object store using the same basic code used to get() it by its key path; however, the get() example earlier in this chapter was a read-only task, and this is a read-write task:

function deleteObjectById(id) {
   var transaction =
 db.transaction(objectStore, IDBTransaction READ_WRITE);   var store = transaction.
 objectStore(objectStore);
   var request = store.delete(id);
   request.onsuccess = function(event) {
     // Update the web page
   };
  request.onerror = function(event) {...};
 }

Only the object with a key path value of id is deleted. The process to delete an object may not be instantaneous. Remember that the IndexedDB API runs asynchronously. Therefore, only after you ...