微信小程序界面设计小程序中的WXSS(css)选择器课程-子元素选择器

13516821613 2021-07-20 03:35:46
css 小程序界面设计


小程序中的WXSS(css)选择器课程-子元素选择器

微信小程序交流群:111733917 | 微信小程序从0基础到就业的课程:https://edu.csdn.net/topic/huangjuhua

后代选择器相比,子元素选择器(Child selectors)只能选择作为某元素子元素的元素。
选择子元素
如果您不希望选择任意的后代元素,而是希望缩小范围,只选择某个元素的子元素,请使用子元素选择器(Child selector)。
例如,如果您希望选择只作为 h1 元素子元素的 strong 元素,可以这样写:

h1 > strong {color:red;}

这个规则会把第一个 h1 下面的两个 strong 元素变为红色,但是第二个 h1 中的 strong 不受影响:

<!DOCTYPE HTML>
<html>
<head>
<style type="text/css">
h1 > strong {color:red;}
</style>
</head>
<body>
<h1>This is <strong>very</strong> <strong>very</strong> important.</h1>
<h1>This is <em>really <strong>very</strong></em> important.</h1>
</body>
</html>

效果图

在这里插入图片描述

语法解释
您应该已经注意到了,子选择器使用了大于号(子结合符)。
子结合符两边可以有空白符,这是可选的。因此,以下写法都没有问题:

h1 > strong
h1> strong
h1 >strong
h1>strong

如果从右向左读,选择器 h1 > strong 可以解释为“选择作为 h1 元素子元素的所有 strong 元素”。
结合后代选择器和子选择器
请看下面这个选择器:

table.company td > p

上面的选择器会选择作为 td 元素子元素的所有 p 元素,这个 td 元素本身从 table 元素继承,该 table 元素有一个包含 company 的 class 属性。

小程序应用

防采集标记:黄菊华老师的课程和资料

Wxml代码

 <view>
<navigator><text>连接3</text></navigator>
</view>
<view>
<navigator><view>连接4</view></navigator>
</view>
<view>
<navigator>
<text>说明</text>
<view>
<text>使用方式</text>
<text>使用人群</text>
</view>
<text>销售数据</text>
<view>
<text>销量</text>
<text>库存</text>
</view>
</navigator>
</view>
<view>
1111111111
<view>22222222
<navigator>
<view>
333333333
</view>
</navigator>
</view>
</view>

Wxss代码

navigator > text{ color: blue;}
view > view { color: green;}

效果图
在这里插入图片描述

欢迎大家学习我的视频课程:微信小程序界面设计-小程序中的WXSS(css)选择器课程

微信小程序界面设计小程序中的WXSS(css)选择器课程-子元素选择器

版权声明
本文为[13516821613]所创,转载请带上原文链接,感谢
https://blog.51cto.com/u_13898481/2890409

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