js事件委托实现一次绑定，多次删除功能

<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}

ul,
li {
list-style: none;
}

#u1 {
width: 905px;
height: 500px;
background: purple;
margin-left: 50px;
margin-top: 20px;
cursor: pointer;
}

#u1 li {
width: 40px;
height: 240px;
background: yellow;
float: left;
user-select: none;
margin-top: 5px;
font-size: 30px;
color: green;
cursor: pointer;
display: block;
border-left: 1px solid #cccccc;
}
</style>
<script>
window.onload = function () {
var u1 = document.querySelector("#u1");
// console.log(u1);
u1.onclick = function (e) {
e.target.style.display = "none";
console.log(e.target);
}

}
</script>
</head>

<body>
<ul id="u1">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
<li>11</li>
<li>12</li>
<li>13</li>
<li>14</li>
<li>15</li>
<li>16</li>
<li>17</li>
<li>18</li>
<li>19</li>
<li>20</li>
<li>21</li>
<li>22</li>
<li>23</li>
<li>24</li>
<li>25</li>
<li>26</li>
<li>27</li>
<li>28</li>
<li>29</li>
<li>30</li>
<li>31</li>
<li>32</li>
<li>33</li>
<li>34</li>
<li>35</li>
<li>36</li>
<li>37</li>
<li>38</li>
<li>39</li>
<li>40</li>
<li>41</li>
<li>42</li>
<li>43</li>
<li>44</li>
</ul>
</body>

</html>
posted @ 2019-04-20 17:29  sun丶凹凸曼  阅读(265)  评论(0)    收藏  举报