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JS Closures

Counting with a local variable.

Count!

0

// Function to increment counter
function add() {
  let counter = 0;
  counter += 1;
  return counter;
}
// Trying to increment the counter
function myFunction(){
  document.getElementById("demo").innerHTML = add();
}

• It did not work because we reset the local counter every time we call the function.
• A JavaScript inner function can solve this.