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<html><body>
<script>
function checkPaste(event)
{
let output = document.getElementById("output");
output.textContent = checkPasteHelper(event);
}
function checkPasteHelper(event)
{
let dt = event.clipboardData;
if (dt.types.length != 2)
return "Wrong number of types; got " + dt.types.length;
for (let type of dt.types) {
if (type != "Files" && type != "application/x-moz-file")
return "Invalid type for types; got" + type;
}
for (let type of dt.mozTypesAt(0)) {
if (type != "Files" && type != "application/x-moz-file")
return "Invalid type for mozTypesAt; got" + type;
}
if (dt.getData("text/plain"))
return "text/plain found with getData";
if (dt.mozGetDataAt("text/plain", 0))
return "text/plain found with mozGetDataAt";
return "Passed";
}
</script>
<input id="input" onpaste="checkPaste(event)">
<div id="output"></div>
</body></html>
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