<!DOCTYPE html>
<html lang="en-US">
<body>
<p>Check your console (Press F12)</p>
<p id="point"></p>
<script>
var x = document.getElementById("point");
let i = 1;
switch(i){
case 0:
let foo = "zero";
x.innerText = foo;
break;
case 1:
let foo = "one"; // SyntaxError thrown.
x.innerText = foo;
break;
}
</script> </body>
</html>