https://github.com/dmijatovic/indexeddb

Testing indexed db operations in plain javascript
https://github.com/dmijatovic/indexeddb

Last synced: 10 days ago
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Testing indexed db operations in plain javascript

• Host: GitHub
• URL: https://github.com/dmijatovic/indexeddb
• Owner: dmijatovic
• License: apache-2.0
• Created: 2024-07-07T09:20:09.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2024-07-07T19:02:13.000Z (7 months ago)
• Last Synced: 2024-11-13T16:54:09.967Z (2 months ago)
• Language: JavaScript
• Size: 61.5 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# IndexedDB

This is test for indexedDB operations. The interface is quite "old fashion" with events like `onsuccess`, `onerror`

## Onupgradeneeded

This is important event. `onupgradeneeded` is triggered w

`onupgradeneeded` is called when you change the db version, from no database to first version, first version to second version etc...

`onsuccess` is called each time you make a new request, even if the database schemas has not been changed.

## Create new object or alter structure

This can be only done in `onupgradeneeded`. This event is triggered by changing the database version.

## Write data to existing table

Writing data can be only done using `transaction`. Read the [documentation](https://developer.mozilla.org/en-US/docs/Web/API/IDBTransaction)

Transaction modes are `readonly`, `readwrite`, `versionchange`. [Read more in docs](https://developer.mozilla.org/en-US/docs/Web/API/IDBTransaction/mode)

## Check data object exist

To check we need to use contains see https://developer.mozilla.org/en-US/docs/Web/API/DOMStringList

```javascript

console.log("customers data found", db.objectStoreNames.contains("customers"))

```