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# Breaking changes in 7.x
- No longer committing `build` to GitHub.
- Renamed files in dist.
- Added conditional exports.
- iife build is now a umd.
# Breaking changes in 6.x
Some TypeScript definitions changed so write-methods are missing from 'readonly' transactions. This might be backwards-incompatible with code that performs a lot of type wrangling.
# Breaking changes in 5.x
I moved some files around, so I bumped the major version for safety.
# Changes in 4.x
## Breaking changes
### Opening a database
```js
// Old 3.x way
import { openDb } from 'idb';
openDb('db-name', 1, (upgradeDb) => {
console.log(upgradeDb.oldVersion);
console.log(upgradeDb.transaction);
});
```
```js
// New 4.x way
import { openDB } from 'idb';
openDB('db-name', 1, {
upgrade(db, oldVersion, newVersion, transaction) {
console.log(oldVersion);
console.log(transaction);
},
});
```
- `openDb` and `deleteDb` were renamed `openDB` and `deleteDB` to be more consistent with DOM naming.
- The signature of `openDB` changed. The third parameter used to be the upgrade callback, it's now an option object which can include an `upgrade` method.
- There's no `UpgradeDB` anymore. You get the same database `openDB` resolves with. Versions numbers and the upgrade transaction are included as additional parameters.
### Promises & throwing
The library turns all `IDBRequest` objects into promises, but it doesn't know in advance which methods may return promises.
As a result, methods such as `store.put` may throw instead of returning a promise.
If you're using async functions, there isn't a difference.
### Other breaking changes
- `iterateCursor` and `iterateKeyCursor` have been removed. These existed to work around browsers microtask issues which have since been fixed. Async iterators provide similar functionality.
- All pseudo-private properties (those beginning with an underscore) are gone. Use `unwrap()` to get access to bare IDB objects.
- `transaction.complete` was renamed to `transaction.done` to be shorter and more consistent with the DOM.
- `getAll` is no longer polyfilled on indexes and stores.
- The library no longer officially supports IE11.
## New stuff
- The library now uses proxies, so objects will include everything from their plain-IDB equivalents.
- TypeScript support has massively improved, including the ability to provide types for your database.
- Optional support for async iterators, which makes handling cursors much easier.
- Database objects now have shortcuts for single actions (like `get`, `put`, `add`, `getAll` etc etc).
- For transactions that cover a single store `transaction.store` is a reference to that store.
- `openDB` lets you add callbacks for when your database is blocking another connection, or when you're blocked by another connection.
# Changes in 3.x
The library became a module.
```js
// Old 2.x way:
import idb from 'idb';
idb.open(…);
idb.delete(…);
// 3.x way:
import { openDb, deleteDb } from 'idb';
openDb(…);
deleteDb(…);
```