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vanilla1.html
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vanilla1.html
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<!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>Document</title>
</head>
<body>
<div>
<button id="minus">-</button>
<p id="number">0</p>
<button id="plus">+</button>
</div>
<script>
const number = document.querySelector('#number');
const decrement = () => {
const currentNumber = Number(number.innerHTML);
number.innerHTML = currentNumber - 1;
};
const increment = () => {
const currentNumber = Number(number.innerHTML);
number.innerHTML = currentNumber + 1;
};
document.querySelector('#minus').addEventListener('click', decrement);
document.querySelector('#plus').addEventListener('click', increment);
</script>
</body>
</html>