chromium/third_party/blink/manual_tests/load-deferrer-script-element.html

<html>
<head>
<script>
function log(message)
{
    document.getElementById("result").innerHTML += message + "<br>";
}

function loadJSFile(){
    var s = document.createElement('script')
    s.setAttribute("type", "text/javascript")
    s.setAttribute("src", "resources/load-deferrer-script-element.js")

    document.getElementsByTagName("head")[0].appendChild(s);
}

jsLoaded = false;
runningModal = false;

// This line will load external script into memory.
loadJSFile();

function runModal()
{
    jsLoaded = true;
    loadJSFile();
 
    runningModal = true;
    alert("Scripts should not be running in the background!");
    runningModal = false;
}
</script>
</head>
 
<body>
    
<p>This tests the bug https://bugs.webkit.org/show_bug.cgi?id=38910.
Click the button, wait 5 seconds and close it.
The test passes if no error messages show up in the page!</p>
<input id="button" type="button" value="click me" onclick="runModal()"/>
<p id="result"></p>

</body>
</html>