Claim:
- HTML tags only write one line header
- Use JS to write dynamic tables (as many sets of data, as many rows of tables are automatically created)
- For learning and demonstration, fixed data is used, no background data is involved
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
table {
width: 500px;
margin: 100px auto;
border-collapse: collapse;
text-align: center;
}
td,
th {
border: 1px solid #333;
}
thead tr {
height: 40px;
background-color: #ccc;
}
</style>
</head>
<body>
<table cellspacing="0">
<thead>
<tr>
<th>姓名</th>
<th>科目</th>
<th>成绩</th>
<th>操作</th>
</tr>
</thead>
<tbody></tbody>
</table>
<script>
// 1.先准备好学生的数据,用数组形式储存，每个数组元素是一个对象
var datas = [{
name: '张三',
subject: 'JavaScript',
score: 100
}, {
name: '李四',
subject: 'JavaScript',
score: 98
}, {
name: '王五',
subject: 'JavaScript',
score: 99
}, {
name: '赵六',
subject: 'JavaScript',
score: 88
}, {
name: '小明',
subject: 'JavaScript',
score: 60
}];
// 2. 往tbody 里面创建行： 有几个人（通过数组的长度）我们就创建几行
var tbody = document.querySelector('tbody');
for (var i = 0; i < datas.length; i++) {
// 外面的for循环管行 tr
// 1. 创建 tr行
var tr = document.createElement('tr');
tbody.appendChild(tr);
// 2. 行里面创建单元格(跟数据有关系的3个单元格) td 单元格的数量取决于每个对象里面的属性个数 for循环遍历对象 datas[i]
for (var k in datas[i]) {
// 里面的for循环管列 td
// 创建单元格
var td = document.createElement('td');
// 把对象里面的属性值 datas[i][k] 给 td
// console.log(datas[i][k]);
td.innerHTML = datas[i][k];
tr.appendChild(td);
}
// 3. 创建有删除2个字的单元格
var td = document.createElement('td');
td.innerHTML = '<a href="javascript:;">删除</a>';
tr.appendChild(td);
}
// 4. 删除操作
var as = document.querySelectorAll('a');
for (var i = 0; i < as.length; i++) {
as[i].onclick = function() {
// 点击a删除 当前a所在的行(a父节点的父节点) node.removeChild(child)
tbody.removeChild(this.parentNode.parentNode)
}
}
</script>
</body>
</html>
Realization effect:
Click the delete button and the corresponding row will be deleted.
Click to delete the data of "Zhang San":
