indexedDB | A wrapper for indexedDB with transaction supprot | Storage library

We're using DexieJS as a wrapper around IndexedDb and are looking for a way to determine if the underlying DB schema changes. Worst case, this is a user deleting a table, or the entire DB, in the midst of using our application (unlikely? sure, but come on - users).
Alternately, does IndexedDb record anything like a "Last Modified" value? We could make that work if that was all we had available. Subscribable events would be better, though... Does IndexedDb or Dexie support anything like this?

I want to check and update quantity of item in indexeddb store if it already exist. This how I current add item to the store using Dexie

I am using following statement to import dart indexed db library in Flutter application:

Consider, I have an IndexedDB database with a composite key, e.g.: [prop1, prop2].

Is it possible to do a partial query where only one part of the key is known to return multiple records from the database?

This will be equivalent to the following SQL query:

SELECT * FROM table WHERE prop1 = 'foo'

OR:

SELECT * FROM table WHERE prop2 = 'bar'

I've tried to use getAll() method, but it looks like it's expecting value for both parts of the key.

If it's not possible — what alternative could be considered instead?

I want to store my API data in indexedDB of Browser. I would have tried local storage but it has a limit of 5MB but my JSON data is more than 7MB. I want to save in indexedDB for faster access. I want to save the whole data in the JSON format but don't know how to set the scheme of the indexed DB. The data fetched from the database is testData

I'm tryin to update mysql with data from IndexedDb.

I loop threw the IndexedDb and inset data to mysql.
When a ajax call is complete the loop should contineu.

But i get this error:

Uncaught DOMException: Failed to execute 'update' on 'IDBCursor': The transaction has finished.

I can se that the Ajax call returned success and mySql is updated.
But when it comes to update the IndexDb it returns error.

This is the code:

I am working on IndexedDB functionality in JS - i would like to add some custom jquery trigger event with object of IndexedDB upon success callback, not sure whether it is possible but when i test event fired but it doesn't pass IndexedDB object

I keep getting this message in the console:

Uncaught TypeError: Cannot read property 'transaction' of undefined.

I've tried deleting the DB, restarting live server, moving the add() into the onsuccess, but I can't quite figure out what to do. This line seems ok to me: const transaction = DB.transaction(['crm'], 'readwrite'); other answers I've checked were confusing

Working on an app that uses the new(ish) File System Access API, and I wanted to save the fileHandles of recently loaded files, to display a "Recent Files..." menu option and let a user load one of these files without opening the system file selection window.

This article has a paragraph about storing fileHandles in IndexedDB and it mentions that the handles returned from the API are "serializable," but it doesn't have any example code, and JSON.stringify won't do it.

File handles are serializable, which means that you can save a file handle to IndexedDB, or call postMessage() to send them between the same top-level origin.

Is there a way to serialize the handle other than JSON? I thought maybe IndexedDB would do it automatically but that doesn't seem to work, either.