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prototype to detect webkit bug

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Bruno Windels 2021-03-04 19:50:02 +01:00
parent 932d26ed8c
commit ea66b75b86
1 changed files with 71 additions and 0 deletions
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prototypes/idb-test-safari-close-txn.html Normal file
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<html>
<head><meta charset="utf-8"></head>
<body>
<script type="text/javascript">
const log = (...params) => {
document.write(params.join(" ")+"<br>");
};
function reqAsPromise(req) {
return new Promise((resolve, reject) => {
req.onsuccess = () => resolve(req.result);
req.onerror = (err) => reject(err);
});
}
function txnAsPromise(txn) {
return new Promise((resolve, reject) => {
txn.addEventListener("complete", resolve);
txn.addEventListener("abort", reject);
});
}
function openDatabase(name, createObjectStore, version) {
const req = indexedDB.open(name, version);
req.onupgradeneeded = (ev) => {
const db = ev.target.result;
const txn = ev.target.transaction;
const oldVersion = ev.oldVersion;
createObjectStore(db, txn, oldVersion, version);
};
return reqAsPromise(req);
}
async function detectWebkitEarlyCloseTxnBug() {
const dbName = "webkit_test_inactive_txn_" + Math.random() * Number.MAX_SAFE_INTEGER;
try {
const db = await openDatabase(dbName, db => {
db.createObjectStore("test", {keyPath: "key"});
}, 1);
const readTxn = db.transaction(["test"], "readonly");
await reqAsPromise(readTxn.objectStore("test").get("somekey"));
// schedule a macro task in between the two txns
await new Promise(r => setTimeout(r, 0));
const writeTxn = db.transaction(["test"], "readwrite");
await Promise.resolve();
writeTxn.objectStore("test").add({key: "somekey", value: "foo"});
await txnAsPromise(writeTxn);
} catch (err) {
if (err.name === "TransactionInactiveError") {
return true;
}
} finally {
try {
indexedDB.deleteDatabase(dbName);
} catch (err) {}
}
return false;
}
(async () => {
if (await detectWebkitEarlyCloseTxnBug()) {
log("the test failed, your browser seems to have the bug");
} else {
log("the test succeeded, your browser seems fine");
}
})();
</script>
</body>
</html>