原生js是通过value属性来获取/设置表单内容
jQuery中是通过val()方法来获取/设置表单内容
- val()方法不给参数就是获取表单内容
- val()方给参数就是设置表单内容
动态数据添加和删除练习:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
* {
padding: 0;
margin: 0;
}
.wrap {
width: 410px;
margin: 100px auto 0;
}
table {
border-collapse: collapse;
border-spacing: 0;
border: 1px solid #c0c0c0;
}
th,
td {
border: 1px solid #d0d0d0;
color: #404060;
padding: 10px;
}
th {
background-color: #09c;
font-weight: bold;
font-size: 16px;
color: #fff;
}
td {
font-size: 14px;
}
td a.get {
text-decoration: none;
}
a.del:hover {
text-decoration: underline;
}
tbody tr {
background-color: #f0f0f0;
}
tbody tr:hover {
cursor: pointer;
background-color: #fafafa;
}
#j_btnAddDate {
width: 110px;
height: 30px;
font-size: 20px;
font-weight: bold;
margin-bottom: 10px;
}
.form-item {
height: 100%;
position: relative;
padding-left: 100px;
padding-right: 20px;
margin-bottom: 34px;
line-height: 36px;
}
.form-item>.lb {
position: absolute;
left: 0;
top: 0;
display: block;
width: 100px;
text-align: right;
}
.form-item>.txt {
width: 300px;
height: 32px;
}
.mask {
position: absolute;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
background: #000;
opacity: 0.15;
display: none;
}
.form-add {
position: fixed;
top: 30%;
left: 50%;
margin-left: -197px;
padding-bottom: 20px;
background: #fff;
display: none;
}
.form-add-title {
background-color: #f7f7f7;
border-width: 1px 1px 0 1px;
border-bottom: 0;
margin-bottom: 15px;
position: relative;
}
.form-add-title span {
width: auto;
height: 18px;
font-size: 16px;
font-weight: bold;
color: rgb(102, 102, 102);
text-indent: 12px;
padding: 8px 0px 10px;
margin-right: 10px;
display: block;
overflow: hidden;
text-align: left;
}
.form-add-title div {
width: 16px;
height: 20px;
position: absolute;
right: 10px;
top: 6px;
font-size: 30px;
line-height: 16px;
cursor: pointer;
}
.form-submit {
text-align: center;
}
.form-submit input {
width: 170px;
height: 32px;
}
</sty
</style>
</head>
<body>
<div class="wrap">
<input type="button" value="添加数据" id="j_btnAddDate">
<table>
<thead>
<tr>
<th>课程名称</th>
<th>所属学院</th>
<th>操作</th>
</tr>
</thead>
<tbody id="j_tb">
<tr>
<td>JavaScript</td>
<td>前端与移动开发学院</td>
<td>
<a href="#" class="get">DELETE</a>
</td>
</tr>
<tr>
<td>css</td>
<td>前端与移动开发学院</td>
<td>
<a href="#" class="get">DELETE</a>
</td>
</tr>
<tr>
<td>html</td>
<td>前端与移动开发学院</td>
<td>
<a href="#" class="get">DELETE</a>
</td>
</tr>
<tr>
<td>jQuery</td>
<td>前端与移动开发学院</td>
<td>
<a href="#" class="get">DELETE</a>
</td>
</tr>
</tbody>
</table>
</div>
<!--遮罩层-->
<div id="j_mask" class="mask"></div>
<!--添加数据的表单-->
<div id="j_formAdd" class="form-add">
<div class="form-add-title">
<span>添加数据</span>
<div id="j_hideFormAdd">×</div>
</div>
<div class="form-item">
<label class="lb" for="j_txtLesson">课程名称：</label>
<input class="txt" type="text" id="j_txtLesson" placeholder="请输入课程名称" />
</div>
<div class="form-item">
<label class="lb" for="j_txtBelSch">所属学院：</label>
<input class="txt" type="text" id="j_txtBelSch" value="前端与移动开发学院" />
</div>
<div class="form-submit">
<input type="button" value="添加" id="j_btnAdd" />
</div>
</div>
</body>
</html>
<script src="js/jquery.js"></script>
<script>
$(function() {
//1:点击添加数据按钮,显示添加面板和遮罩层
$("#j_btnAddDate").click(function() {
$("#j_formAdd").show();
$("#j_mask").show();
});
//2:点击添加面板里的关闭按钮,隐藏添加面板和遮罩层
$("#j_hideFormAdd").click(function() {
$("#j_formAdd").hide();
$("#j_mask").hide();
});
//3:点击添加面板里的添加按钮,会把输入的内容生成一个tr,这个tr添加到tbody中
$("#j_btnAdd").click(function() {
//获取到用户输入的所属学院和课程名称
var $txtLesson = $("#j_txtLesson").val(); //获取用户输入的课程名称
var $txtBelSch = $("#j_txtBelSch").val(); //获取用户输入的所属学院
//把用户输入的课程名称和所属学院，创建出一个tr
var $trNew = $('<tr>' +
'<td>' + $txtLesson + '</td>' +
'<td>' + $txtBelSch + '</td>' +
'<td><a href="#" class="get">DELETE</a></td>' +
'</tr>'
);
//给新建的$trNew里的a标签添加一个事件
$trNew.find(".get").click(function() {
$trNew.remove();
});
//把创建的tr标签添加到tbody中
$("#j_tb").append($trNew);
//关闭面板和遮罩
$("#j_hideFormAdd").click();
});
//4:点击delete这些a标签,删除对应的tr
$("#j_tb .get").click(function() {
$(this).parent().parent().remove();
});
});
</script>
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