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scope.html
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scope.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Scope</title>
</head>
<body>
<script>
// global scope
let counter = 0;
// global scope
function hitMe(){
// local scope hitMe
counter++;
}
// global scope
function other(){
// local scope other
}
hitMe();
hitMe();
console.info(counter);
function first(){
// local scope first
let firstVariable = "First";
function firstNested(){
console.info(firstVariable);
const firstNestedVariable = "First Nested";
}
firstNested();
console.info(firstNestedVariable);
}
function second(){
// local scope second
let secondVariable = "Second";
// console.info(firstVariable); // ERROR
}
first();
second();
// global scope
// console.info(firstVariable); // ERROR
// console.info(secondVariable); // ERROR
</script>
</body>
</html>