Here is some simple 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>Document</title>
</head>
<body>
<div class="p">
<button class="c1">Click</button>
<button class="c2">whatever</button>
</div>
<script>
document.querySelector('.c1').addEventListener('click', () => {
console.log('Click c1')
})
document.querySelector('.c2').addEventListener('click', () => {
document.querySelector('.p').innerHTML = ''
})
</script>
</body>
</html>
I can inspect some dom element and get the eventListeners in browser, but I want to know whether the child nodes eventListener gets removed after parentNode.innerHTML = ''.
eg: after click button.c2, how can I know eventListener on button.c1 and button.c2 get removed? if dom get removed ,so the corresponding eventListener also get removed? is there some memory leak issue?