DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>

var frameRoot;

function boom()
{
    var frameWin = f.contentWindow;
    frameRoot = frameWin.document.documentElement;
    frameWin.location.replace("data:text/html;charset=UTF-8,<body onload='parent.g();'>2");
}

function g()
{
    setTimeout(h, 0);
}

function h()
{
    var newDoc = document.implementation.createDocument('', '', null);
    newDoc.adoptNode(frameRoot);
}

</script>
<body onload="boom();">

<iframe id="f" src="data:text/html;charset=UTF-8,<marquee>1"></iframe>

</body>
</html>