css - html中如何给div的背景图片设置类似z-index的属性来让背景图片不被div中的其他元素遮挡

图中底部的白色部分就是一个背景图，有一个根竖线是在这个div中的元素，怎么实现这根线置于白色背景图的下边，不要把背景图盖住，有没有类似z-index的属性来设置背景图的层次优先级 达到这样的效果：

From [HTMLdiscussion group] 2017-04-17 13:11:27 0  2  1168

内联元素块元素和内联块元素都有什么特点，他们的区别又是什么？

From [HTMLdiscussion group] 2017-03-21 10:39:00 0  2  1168

css - 为什么user agent stylesheet 的优先级会高于我们自己写的样式

一般来说，我们自己写的样式是高于浏览器代理样式的，但下面的密码框，记住密码后，背景色被自动填充成黄色，原来我写的背景透明样式被覆盖了我在网上查了下，说文档类型声明有误，但我用的就是h5的声明方式啊&lt...

From [HTMLdiscussion group] 2017-04-17 14:20:33 0  2  1167

html5 - websocket如何带上cookie？

websocket如何带上cookie？

From [HTMLdiscussion group] 2017-04-17 13:03:00 0  2  1167

微信小程序下拉加载更多数据如何实现

最近在做一个微信小程序试试水，哪位大神知道下拉加载更多如何实现呀。

From [HTMLdiscussion group] 2017-02-28 09:24:23 0  2  1167

When learning HTML, click "Run Example" and click "Submit", but the white box on the right has no response.

I had to go to php.cn.htm on my computer desktop and copy the code to refresh it every time. I tried using IE ...

From [HTMLdiscussion group] 2021-06-06 15:23:48 0  2  1166

css - HTML 隐藏或去除拖曳时的半透明内容?

拖曳内容时会有一个半透明的效果.请问如何去除?

From [HTMLdiscussion group] 2017-04-17 13:50:23 0  2  1166

javascript - When the mouse is clicked on the Canvas page, how to determine whether the position of the point is on the line drawn in it? Something triggers an event on a drawn line?

Below are three sections of underlined code. When I enter the editing mode; when I click the left mouse button...

From [HTMLdiscussion group] 2017-06-13 09:24:19 0  1  1165

html5 - html css js等web前端技术可以用来写windows下客户端程序？

http://www.wandoujia.com/join#job-1 在这个豌豆荚招聘前端工程师的页面中，说豌豆荚win版本是基于webkit开发的客户端软件，职位要求里说用web前端技术开发windows客户端，我是...

From [HTMLdiscussion group] 2017-04-17 13:04:16 0  13  1165

When linking pictures, the link fails

<link rel="shortcut icon" type="image/x-icon" href="image/bd.png">I didn’t...

From [HTMLdiscussion group] 2019-01-13 23:10:49 0  2  1162

Where can I download the text, pictures and other files of this courseware?

Xiaomi Mall static web page

From [HTMLdiscussion group] 2018-12-02 16:27:04 0  0  1162

html5 - 求github相关资料，书籍，视频都可以？

求github相关资料，书籍，视频都可以？

From [HTMLdiscussion group] 2017-04-17 11:07:34 0  11  1162

javascript - How to get the number of automatically wrapped lines in textarea in js?

To enter content in a textarea, the default is one line. When too much content is entered, the line will autom...

From [HTMLdiscussion group] 2017-05-16 13:44:17 0  4  1161

Why use two divs?

<div class="tv_show l">    <div class="big_show l"> &...

From [HTMLdiscussion group] 2020-05-13 17:25:08 0  2  1159

Can't watch the video

What can’t be seen?

From [HTMLdiscussion group] 2019-04-04 11:04:04 0  2  1159