+ 4
HTML
-------
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<button onclick="change()">Change</button>
</body>
</html>
JS
----
let count = 0;
function change() {
if(count == 3) {
body = document.getElementsByTagName("body")[0];
body.style.background = "red";
}
count++;
}
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