<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>事件解绑</title>
</head><body><button>点击</button><script>const btn = document.querySelector('button')// btn.onclick = function(){// alert('点击了')// // L0事件解绑// btn.onclick = null// }function fn() {alert('点击了')}btn.addEventListener('click', fn)// L2事件解绑btn.removeEventListener('click', fn)</script>
</body></html>