mrtampan

<script>
// contoh benar
let a = "";
function aku(){
  a = "apa cuk";
  alert(a);
}
aku();

// contoh benar dalam scope

mrtampan

<script>
function hay(){
  var hey = "";
}

function ubah() {
  hey = "hallo teman";
}

ubah();

mrtampan

<script>
var ab = "hallo dunia";

function test() {
  ab = "hello world";
  alert(ab);
}

test();
</script>

mrtampan

<script>
var sound = new Howl({
  src: ['sound.mp3']
});
sound.play();
</script>