所以我有
<ul id="list">
<li>Some text <span class="removeParent">X</span></li>
</ul>
当单击span.removeParent时,必须删除li。
这很简单,但是我想到的唯一(不幸的是正在工作)的解决方案是:
span.addEventListener("click", this.parentElement.parentElement.removeChild(this.parentElement);
可能没有上下文,因此这是完整的待办事项应用程序的链接: https://jsfiddle.net/w246hn3b/3/
我不确定
this.parentElement.parentElement.removeChild(this.parentElement);
是最好,最有效的解决方案
答案 0 :(得分:3)
这是事件委托的绝佳用例。由于click事件会将DOM扩展到父节点,因此您可以在根祖先上监听click事件,然后检查clicked元素是否与您的目标类型匹配。
var todolist = document.getElementById('todolist');
todolist.addEventListener('click', function(e){
if(e.target.matches('.remove')){
todolist.removeChild(e.target.parentNode);
}
});
.remove {
color: #821818;
display: inline-block;
padding: 3px 10px;
border: 1px solid #d84c4c;
border-radius: 2px;
cursor: pointer;
position: absolute;
right: 0px;
top: 0px;
height: 100%;
box-sizing: border-box;
background: #f1bbc0;
font-weight: 700;
font-size: 25px;
}
#todolist{
list-style:none;
}
#todolist li{
display:block;
position:relative;
padding:8px 6px;
width:300px;
margin:5px 0px;
border-radius:2px;
box-shadow: 0 3px 4px 0 rgba(0, 0, 0, 0.14), 0 1px 8px 0 rgba(0, 0, 0, 0.12), 0 3px 3px -2px rgba(0, 0, 0, 0.4);
}
<ul id='todolist'>
<li>1<span class='remove'>×</span></li>
<li>2<span class='remove'>×</span></li>
<li>3<span class='remove'>×</span></li>
<li>4<span class='remove'>×</span></li>
<li>5<span class='remove'>×</span></li>
<li>6<span class='remove'>×</span></li>
<li>7<span class='remove'>×</span></li>
<li>8<span class='remove'>×</span></li>
</ul>
有关事件委托的一些资源: https://gomakethings.com/why-event-delegation-is-a-better-way-to-listen-for-events-in-vanilla-js/