This site is mobile accessible. Press the "Tap Here" button to use a smaller font-size.

Tap Here!

Smartphone icons created by Freepik - Flaticon

JS Closures

Counting with a local variable.

Count!

0

const add = (function () {
  let counter = 0;
  return function () {counter += 1; return counter;}
})();

function myFunction(){
  document.getElementById("demo").innerHTML = add();
}