dart:indexed_db

Свойство onUpgradeNeeded

Поток upgradeneeded событий, обрабатываемых этим OpenDBRequest.

Исходный код

@DomName('IDBOpenDBRequest.onupgradeneeded')
@DocsEditable()
Stream<VersionChangeEvent> get onUpgradeNeeded =>
    upgradeNeededEvent.forTarget(this);