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<html><body><h2>JavaScript Closures</h2><p>Counting with a local variable.</p><button type="button" onclick="myFunction()">Count!</button><p id="demo">0</p><script>const add = (function () { let counter = 0; return function () {counter += 1; return counter;}})();function myFunction(){ document.getElementById("demo").innerHTML = add();}</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_function_closures5 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:06:53 GMT --></html>