实例
<!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>
</head>
<body>
<label for="comment">留言内容</label>
<input type="text" id="comment" onkeydown="addComment(this)" autofocus>
<ul id="list"></ul>
<script>
// 增加留言
function addComment (comment){
// console.log(event.keyCode);
if (event.keyCode === 13) {
// 创建一个li
var item = document.createElement('li');
item.innerHTML = comment.value;
item.innerHTML += '<button onclick="del1(this)">删除</button>';
// 获取第一个ul ,ul绑定的cssID是 list
var list = document.querySelector('#list');
if(list.childElementCount === 0){
// 如果这是第一条则不做处理直接插入
list.append(item);
}else{
var first = list.firstElementChild;
list.prepend(item,first);
}
// 清空文本框
comment.value = '';
}
}
</script>
<script>
function del1(wh){
return confirm('是否删除?') ? wh.parentElement.remove() : false;
}
</script>
<table id="cart1">
<table id="cart">
<caption>水果清单</caption>
<thead>
<tr>
<th>编号</th>
<th>品名</th>
<th>数量</th>
<th>单价</th>
</tr>
</thead>
<tbody></tbody>
</table>
<script>
var data = [
{id:1,name:'西瓜',count:3,price:9},
{id:2,name:'苹果',count:5,price:8},
{id:3,name:'香蕉',count:7,price:15},
{id:4,name:'葡萄',count:8,price:27},
{id:5,name:'橘子',count:4,price:85},
{id:6,name:'芒果',count:2,price:65},
{id:7,name:'木瓜',count:4,price:521},
{id:8,name:'火龙果',count:8,price:45},
{id:9,name:'西红柿',count:1,price:56},
{id:10,name:'大溪谷',count:10,price:5},
{id:11,name:'5',count:100,price:88},
{id:12,name:'7',count:105,price:9}
];
var cart = document.getElementById('cart');
var tbody = cart.tBodies[0];
for(var i =0; i < data.length; i++){
var tr = document.createElement('tr');
// 表格数据的第一行是一个对象,对象是根据属性名来访问
// 只要获取到属性名组成的数组,遍历一下这个对象就可以生成一行数据啦
Object.keys(data[i]).forEach(function(key){
tr.innerHTML += '<td>' + data[i][key] + '</td>';
})
tbody.appendChild(tr);
}
</script>
</body>
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