reload-iframe.html - Android社区 - https://www.androidos.net.cn/

<html manifest="reload-iframe.manifest">
<body>
<script>
function test()
{
    try {
        var req = new XMLHttpRequest();
        req.open("GET", "resources/not-in-cache.txt", false);
        req.send("");
        parent.postMessage("FAIL: Loading an uncached resource didn't raise an exception", "*");
    } catch (e) {
        parent.postMessage("SUCCESS", "*");
    }
}

applicationCache.onnoupdate = function() { parent.postMessage("Frame loaded", "*") }
applicationCache.oncached = function() { parent.postMessage("Frame loaded", "*") }

</script>
</body>
</html>