1.input标签默认内容
男: 女:
广州: 北京: 上海:
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input value="默认内容"/>
<hr />
<textarea>默认内容</textarea>
<hr />
<select>
<option>111</option>
<option>222</option>
<option selected="selected">333</option>
</select>
<hr />
男: <input type="radio" name="r1" checked="checked"/>
女: <input type="radio" name="r1"/>
<hr />
广州: <input type="checkbox" checked="checked" name="e1">
北京: <input type="checkbox" name="e1">
上海: <input type="checkbox" checked="checked" name="e1">
<body>
CSS自定义属性
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.c1[name='a'] {
color: red;
}
</style>
</head>
<body>
<div class="c1" name="a">css自定义属性</div>
</body>
</html>
CSS漂浮(之前的形式比较low)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.left {
float: left;
}
.clean {
background-color: red;
}
/*在类clean后边的样式*/
.clean:after {
/*在clean类后边加上内容"lll"*/
content: 'lll';
/*这个必不可少*/
clear: both;
/*显示为块级标签*/
display: block;
/*去掉lll占的红色背景*/
height: 0;
/*隐藏内容"lll"*/
visibility: hidden;
}
</style>
</head>
<body>
<div class="clean">
<div class="left" style="height: 60px;background-color: greenyellow">123</div>
<div class="left">456</div>
</div>
<!--<div class="sanjiao"></div>-->
</body>
</html>
每个标签都有字标签,其中两个是before、after,分别是在其前、后的样式。上篇博客是在两个div下边直接写一个clear:both,这个示例和那个差不多,先加一点字段占用样式(这里是背景色),然后改为块级、在把占用的样式删除。
CSS之三角形
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.icon {
display: inline-block;
border-bottom: 20px solid red;
border-top: 20px solid transparent;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
}
</style>
</head>
<body>
<div class="icon"></div>
</body>
</html>
JS之全选,反选,取消demo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<script src="jquery-3.1.0.js"></script>
<body>
<input type="button" onclick="CheckAll();" value="全选"/>
<input type="button" onclick="CheckReverse();" value="反选"/>
<input type="button" onclick="CheckCancel();" value="取消"/>
<table border="1">
<thead></thead>
<tbody id="tb1">
<tr>
<td>11</td>
<td><input type="checkbox"/></td>
</tr>
<tr>
<td>22</td>
<td><input type="checkbox"/></td>
</tr>
<tr>
<td>33</td>
<td><input type="checkbox"/></td>
</tr>
</tbody>
</table>
<script>
function CheckAll(){
// $('#tb1').find(':checkbox').attr('checked','checked')
$('#tb1').find(':checkbox').prop('checked',true);
}
function CheckReverse(){
//先找到标签,如果选中,取消,未选中,选中
$('#tb1').find(':checkbox').each(function(){
// $(this) = 每一个复选框
if($(this).prop('checked')){
$(this).prop('checked',false)
}else {
$(this).prop('checked',true)
}
});
}
function CheckCancel(){
// $('#tb1').find(':checkbox').removeAttr('checked');
$('#tb1').find(':checkbox').prop('checked',false);
}
</script>
</body>
</html>