114 lines
2.8 KiB
HTML
114 lines
2.8 KiB
HTML
|
<!DOCTYPE html>
|
|||
|
|
<html lang="en">
|
|||
|
|
<head>
|
|||
|
|
<meta charset="UTF-8">
|
|||
|
|
<title>动态列表</title>
|
|||
|
|
<style>
|
|||
|
|
* {
|
|||
|
|
margin: 0;
|
|||
|
|
padding: 0;
|
|||
|
|
}
|
|||
|
|
body {
|
|||
|
|
background-color: #000;
|
|||
|
|
color: #fff;
|
|||
|
|
}
|
|||
|
|
#app {
|
|||
|
|
width: 40%;
|
|||
|
|
margin: 20px auto;
|
|||
|
|
}
|
|||
|
|
#fruits>li {
|
|||
|
|
width: 90%;
|
|||
|
|
height: 50px;
|
|||
|
|
background-color: #6ca;
|
|||
|
|
margin: 4px 0;
|
|||
|
|
text-align: center;
|
|||
|
|
font-size: 20px;
|
|||
|
|
list-style-type: none;
|
|||
|
|
line-height: 50px;
|
|||
|
|
}
|
|||
|
|
#fruits>li>a {
|
|||
|
|
float: right;
|
|||
|
|
color: #fff;
|
|||
|
|
text-decoration: none;
|
|||
|
|
margin-right: 10px;
|
|||
|
|
}
|
|||
|
|
#fruits+div {
|
|||
|
|
margin-top: 20px;
|
|||
|
|
}
|
|||
|
|
#fname {
|
|||
|
|
width: 70%;
|
|||
|
|
height: 40px;
|
|||
|
|
color: #fff;
|
|||
|
|
border-radius: 8px;
|
|||
|
|
border: none;
|
|||
|
|
outline: none;
|
|||
|
|
font-size: 20px;
|
|||
|
|
text-align: center;
|
|||
|
|
vertical-align: middle;
|
|||
|
|
background-color: #999;
|
|||
|
|
}
|
|||
|
|
#ok {
|
|||
|
|
width: 19%;
|
|||
|
|
height: 40px;
|
|||
|
|
color: #fff;
|
|||
|
|
background-color: #a45;
|
|||
|
|
border: none;
|
|||
|
|
outline: none;
|
|||
|
|
font-size: 16px;
|
|||
|
|
vertical-align: middle;
|
|||
|
|
}
|
|||
|
|
</style>
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div id="app">
|
|||
|
|
<ul id="fruits">
|
|||
|
|
<li>苹果<a href="">×</a></li>
|
|||
|
|
<li>香蕉<a href="">×</a></li>
|
|||
|
|
<li>榴莲<a href="">×</a></li>
|
|||
|
|
<li>火龙果<a href="">×</a></li>
|
|||
|
|
</ul>
|
|||
|
|
<div>
|
|||
|
|
<input type="text" id="fname">
|
|||
|
|
<button id="ok">确定</button>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
|
|||
|
|
<script>
|
|||
|
|
// 1. $函数的参数是一个函数，该函数是页面加载完成后执行的回调函数
|
|||
|
|
$(() => {
|
|||
|
|
function removeItem(evt) {
|
|||
|
|
evt.preventDefault()
|
|||
|
|
// 4. $函数的参数是原生JavaScript对象，返回该原生JavaScript对象对应的jQuery对象
|
|||
|
|
$(evt.target).parent().remove()
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
function addItem(evt) {
|
|||
|
|
let fname = $('#fname').val().trim()
|
|||
|
|
if (fname.length > 0) {
|
|||
|
|
$('#fruits').append(
|
|||
|
|
// 3. $函数的参数是标签字符串，创建对应的标签元素并返回jQuery对象
|
|||
|
|
$('<li>').text(fname).append(
|
|||
|
|
$('<a>').attr('href', '').text('×')
|
|||
|
|
.on('click', removeItem)
|
|||
|
|
)
|
|||
|
|
)
|
|||
|
|
}
|
|||
|
|
$('#fname').val('')
|
|||
|
|
// jQuery对象通过下标运算或get方法可以获得与之对应的原生JavaScript对象
|
|||
|
|
// input.get(0).focus()
|
|||
|
|
$('#fname')[0].focus()
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 2. $函数的参数是选择器字符串，返回对应元素的jQuery对象
|
|||
|
|
$('#fruits a').on('click', removeItem)
|
|||
|
|
$('#ok').on('click', addItem)
|
|||
|
|
$('#fname').on('keydown', (evt) => {
|
|||
|
|
let code = evt.keyCode || evt.which
|
|||
|
|
if (code == 13) {
|
|||
|
|
addItem(evt)
|
|||
|
|
}
|
|||
|
|
})
|
|||
|
|
})
|
|||
|
|
</script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|