js删除全选

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>全选示例</title>
</head>
<body>

<input type="checkbox" id="selectAll"> 全选
<br>
<input type="checkbox" class="item"> 选项1
<input type="checkbox" class="item"> 选项2
<input type="checkbox" class="item"> 选项3

<script>
document.getElementById('selectAll').addEventListener('change', function() {
  var checkboxes = document.querySelectorAll('.item');
  for (var i = 0; i < checkboxes.length; i++) {
    checkboxes[i].checked = this.checked;
  }
});
</script>

</body>
</html>

// 移除事件监听器
document.getElementById('selectAll').removeEventListener('change', function() {
  var checkboxes = document.querySelectorAll('.item');
  for (var i = 0; i < checkboxes.length; i++) {
    checkboxes[i].checked = this.checked;
  }
});

document.getElementById('selectAll').remove();