我正在尝试创建一个待办事项列表。
我正在尝试访问图标标签，这样我就可以点击图标删除列表。
如何在if条件下使用e.target或以其他方式专门针对删除图标？我删除了我的其他代码，如添加任务等，并保留了删除的部分：
<div><i class="fas fa-trash-alt"></i></div>
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JavaScript + DOM</title>
<link rel="stylesheet" type=text/css href="style.css">
<!-- Bootstrap Core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://kit.fontawesome.com/5f492e2f9c.js" crossorigin="anonymous"></script>
</head>
<body>
<div class="container">
<ul class="list-group">
<div>
<li class="list-group-item d-flex">Ivann
<div class="custom-control custom-radio custom-control-inline ml-auto">
<input type="radio" class="custom-control-input" id="defaultInline1" name="inlineDefaultRadiosExample">
<label class="custom-control-label" for="defaultInline1">Yes</label>
</div>
<div class="custom-control custom-radio custom-control-inline">
<input type="radio" class="custom-control-input" id="defaultInline2" name="inlineDefaultRadiosExample">
<label class="custom-control-label" for="defaultInline2">No</label>
</div>
<div><i class="fas fa-trash-alt"></i></div>
</li>
</div>
</ul>
</div>
<script type="text/javascript" src="oldapp.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>
JavaScript:
var ul = document.querySelector("ul");
function removeListAfterClick(e){
if(e.target.parentElement.classList.contains('fa-trash-alt')){
console.log('test');
}
e.preventDefault();
}
ul.addEventListener('click',removeListAfterClick);
您在此处针对的是事件的parentElement，但您正在尝试访问目标子级。
querySelector可以查看元素列表event.target.querySelector('.fa-trash-alt')
var ul = document.querySelector('ul');
const icon = document.querySelector('i.fa-trash-alt');
const iconClass = "fas fa-trash-alt";
function removeListAfterClick(e) {
e.target.className.includes(iconClass) ? icon.remove() : null
e.preventDefault();
}
ul.addEventListener('click', removeListAfterClick);<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>JavaScript + DOM</title>
<link rel="stylesheet" type=text/css href="style.css">
<!-- Bootstrap Core CSS -->
<link
rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
crossorigin="anonymous"
/>
<script
src="https://kit.fontawesome.com/5f492e2f9c.js"
crossorigin="anonymous"
></script>
</head>
<body>
<div class="container">
<ul class="list-group">
<div>
<li class="list-group-item d-flex">
Ivann
<div
class="custom-control custom-radio custom-control-inline ml-auto"
>
<input
type="radio"
class="custom-control-input"
id="defaultInline1"
name="inlineDefaultRadiosExample"
/>
<label class="custom-control-label" for="defaultInline1"
>Yes</label
>
</div>
<div class="custom-control custom-radio custom-control-inline">
<input
type="radio"
class="custom-control-input"
id="defaultInline2"
name="inlineDefaultRadiosExample"
/>
<label class="custom-control-label" for="defaultInline2"
>No</label
>
</div>
<div><i class="fas fa-trash-alt"></i></div>
</li>
</div>
</ul>
</div>
</body>
</html>我是这样做的，它起作用：
var myList = document.getElementsByClassName("list-group-item");
function removeListAfterClick(e){
if(e.target.classList.contains('fa-trash-alt')){
console.log(e.target.parentElement.parentElement.remove());
}
e.preventDefault();
}
for(let i=0; i<myList.length;i++){
myList[i].addEventListener('click',removeListAfterClick);
}