I know my code has a bug, but I can't find it
my code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>live site</title>
</head>
<body>
<textarea name="" id="text_box" cols="30" rows="10" style="font-size: 2em;font-family: cursive;"></textarea>
<div id="sub" style="background: #9e9eff;width: 135px;text-align: center;padding: 7px;border-radius: 7px;font-family: fangsong;font-size: 23px;">Submit</div>
</body>
<script>
var sub = document.getElementById('sub');
sub.onclick = fun;
sub.addEventListener("mouseover", sub_event("over"));
sub.addEventListener("mouseout", sub_event("out"))
function fun() {
let cor = document.getElementById('text_box');
cor.value = cor.value.toLowerCase();
}
function sub_event(event) {
switch (event) {
case "over":
sub.innerHTML = "Submit me!";
break;
case "out":
sub.innerHTML = "Submit";
}
}
</script>
</html>
The addEventListener functions are not working in my code and I did a lot of tests but didn't get anywhere As if something is preventing the events from working