forked from mystiq/hydrogen-web
72 lines
2.5 KiB
HTML
72 lines
2.5 KiB
HTML
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<html>
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<head><meta charset="utf-8"></head>
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<body>
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<script type="text/javascript">
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const log = (...params) => {
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document.write(params.join(" ")+"<br>");
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};
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function reqAsPromise(req) {
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return new Promise((resolve, reject) => {
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req.onsuccess = () => resolve(req.result);
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req.onerror = (err) => reject(err);
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});
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}
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function txnAsPromise(txn) {
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return new Promise((resolve, reject) => {
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txn.addEventListener("complete", resolve);
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txn.addEventListener("abort", reject);
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});
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}
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function openDatabase(name, createObjectStore, version) {
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const req = indexedDB.open(name, version);
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req.onupgradeneeded = (ev) => {
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const db = ev.target.result;
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const txn = ev.target.transaction;
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const oldVersion = ev.oldVersion;
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createObjectStore(db, txn, oldVersion, version);
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};
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return reqAsPromise(req);
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}
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async function detectWebkitEarlyCloseTxnBug() {
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const dbName = "webkit_test_inactive_txn_" + Math.random() * Number.MAX_SAFE_INTEGER;
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try {
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const db = await openDatabase(dbName, db => {
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db.createObjectStore("test", {keyPath: "key"});
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}, 1);
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const readTxn = db.transaction(["test"], "readonly");
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await reqAsPromise(readTxn.objectStore("test").get("somekey"));
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// schedule a macro task in between the two txns
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await new Promise(r => setTimeout(r, 0));
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const writeTxn = db.transaction(["test"], "readwrite");
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await Promise.resolve();
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writeTxn.objectStore("test").add({key: "somekey", value: "foo"});
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await txnAsPromise(writeTxn);
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} catch (err) {
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if (err.name === "TransactionInactiveError") {
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return true;
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}
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} finally {
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try {
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indexedDB.deleteDatabase(dbName);
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} catch (err) {}
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}
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return false;
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}
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(async () => {
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if (await detectWebkitEarlyCloseTxnBug()) {
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log("the test failed, your browser seems to have the bug");
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} else {
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log("the test succeeded, your browser seems fine");
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}
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})();
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</script>
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</body>
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</html>
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