<html>
<body>
<button id='alert-button'>Click me!</button>
<script>
// We use the `id` property of the button to access it from JS
const button = document.getElementById('alert-button')
button.addEventListener('click', () => {
// You could put any other code you wanted here
// and it would run each time the button is clicked
alert('Button was clicked')
})
</script>
</body>
</html>