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<!DOCTYPE html> <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> </html>
