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<html><body><h2>JavaScript Error Handling</h2><p>How to use <b>catch</b> to display an error.</p><p id="demo"></p><script>try { adddlert("Welcome guest!");}catch(err) { document.getElementById("demo").innerHTML = err.message;}</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_try_catch by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 16:49:20 GMT --></html>