File: IndexedDBSuspendImminently.html

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<!DOCTYPE html>
<script>

var db;
var request = window.indexedDB.open("IndexedDBSuspendImminently");

function onPutSuccess(event)
{
    const transaction = event.target.transaction;
    if (!transaction)
        return;

    const objectStore = transaction.objectStore("TestObjectStore");
    const putRequest = objectStore.put("value", "key");
    putRequest.onsuccess = onPutSuccess;
}
    
function startTransactions()
{
    const transaction = db.transaction("TestObjectStore", "readwrite");
    const objectStore = transaction.objectStore("TestObjectStore");
    const putRequest = objectStore.put("value", "key");
    putRequest.onsuccess = (event) => {
        window.webkit.messageHandlers.testHandler.postMessage("Continue");
        onPutSuccess();
    }
    transaction.oncomplete = () => {
        window.webkit.messageHandlers.testHandler.postMessage("Unexpected Success");
    }
    transaction.onabort = () => {
        window.webkit.messageHandlers.testHandler.postMessage("Expected Abort For Suspension");
    }

    const transaction2 = db.transaction("TestObjectStore", "readwrite");
    transaction2.oncomplete = () => {
        window.webkit.messageHandlers.testHandler.postMessage("Expected Success After Resume");
    }
    transaction2.onabort = () => {
        window.webkit.messageHandlers.testHandler.postMessage("Unexpected Abort");
    }
}
    
request.onsuccess = function(event) {
    db = event.target.result;
    startTransactions();
}

request.onupgradeneeded = function(event) {
    var createRequest = event.target.result.createObjectStore("TestObjectStore");
    createRequest.onerror = function(event) {
        window.webkit.messageHandlers.testHandler.postMessage("ObjectStore Error");
    }
}

request.onerror = function(event) {
    window.webkit.messageHandlers.testHandler.postMessage("Open Error");
}

</script>