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<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript</h2>
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<p>If you want to test if an object is not null, you must test if it not undefined first.</p>
​
<p id="demo"></p>
​
<script>
document.getElementById("demo").innerHTML = typeof myObj !== "undefined" && myObj !== null;
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_mistakes_object_null by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:39:35 GMT -->
</html>
​
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