html kodları ;
<!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">
<link rel="stylesheet" href="style.css">
<title>Document</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="container">
<p class="heading">Sayaç</p>
<p class="counter" id="counter">0</p>
<button class="incr">+</button>
<button class="decr">-</button>
</div>
<script src="java.js"></script>
</body>
</html>
js kodları
$(document).ready(function(){
let counter = document.getElementById('counter');
let incr = document.querySelector('.incr');
let decr = document.querySelector('.decr');
let count = 0;
incr.addEventListener("click", ()=> {
count++;
updateDisplay();
});
decr.addEventListener("click", ()=> {
count--;
updateDisplay();
});
function updateDisplay(){
counter.innerHTML = count;
};
});
Kütüphane eklemek işinizi kolaylaştırır hocam bu şekilde deneyebilirsiniz