Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<body>

<p>Never create numbers as objects.</p>
<p>Numbers and objects cannot be safely compared.</p>

<p id="demo"></p>

<script>
var x = 500;              // x is a number
var y = new Number(500);  // y is an object
document.getElementById("demo").innerHTML = (x===y);
</script>

</body>
</html>