<!DOCTYPE html>
<script>
var request = window.indexedDB.open("TestIndexedDB");
request.onsuccess = (event) => {
    db = event.target.result;
    var secondRequest = window.indexedDB.open("TestIndexedDB", db.version + 1);
    secondRequest.onsuccess = (event) => {
        window.webkit.messageHandlers.testHandler.postMessage("Second Open Succeeded");
    }
    secondRequest.onerror = () => {
        window.webkit.messageHandlers.testHandler.postMessage("Second Open Failed: " + secondRequest.error);
    }
}
request.onerror = () => {
    window.webkit.messageHandlers.testHandler.postMessage("First Open Failed: " + request.error);
}
</script>