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