Solution to div+css floating-CSS Tutorial-php.cn

Home

Web Front-end

CSS Tutorial

Solution to div+css floating

高洛峰

Mar 31, 2017 am 11:15 AM

cssfloat

如何清楚浮动（一）

　　已知一个大的div容器，这个容器包含了两个子div容器，然后在这两个子div容器的后面再添加一个div(这个div表示清除浮动的div容器)，清楚浮动的div容器设置css样式为clear:both，此时，大的div标签的内部(左右两边/*css5*/)浮动就清除了。

　　如果有一个大的div容器

，这个大的div包含了一个子div容器

, the sub-div container sets a width, height, background color, and does not set the inner, margins and floating. At this time, the sub-div container defaults to the left, and the sub-div to the left is floating (float)Inherits the properties of the browser and does not have the function of layout. Then we set the float of the sub-div container to float:left; I found that after setting the float:left, the sub-div container floated, and the sub-div container was a certain distance from the top of the large div container.

<body>
        <div class="divcss5">
            <div class="clear"></div>
　　　　　　　　<!--<div class="clear eft"></div>
            　　　　　　　　<div class="clear ight"></div>-->
        </div> 
    </body>

Float has margin attribute

Then I margin-top:10px, the sub-div container moved down 10px on the original basis distance, that is to say, floating will not affect the offset of the margin-top attribute, and similarly will not affect margin-left, margin-right, margin-bottomThe offset that the attribute should have.

Floating does not have top, left, right, bottom attributes

Then, now I delete margin-top:10px;, set top:10px for the sub-div container, and find that the vertical coordinate does not occur. Offset, that is to say, floating does not have a top attribute. In the same way, there are no left, right, and bottom attributes.

So, under what circumstances can the properties of top, left, right, and bottom be set to have an effect on floating?

Floating has top, left, right, and bottom attributes (conditional setting relative position position)

So, I added relative position: relative to the sub-div container, Then set top:10px, and suddenly found that the child div container was offset downward by 10px.

Continue in the state of the child div floating, set it to position: relative;, and then set margin-left: 10px; to it, and see that the position of the child div container moves horizontally to the right If the offset of 10px is changed, margin-top, margin-right, and margin-bottom will all change in the same way.

In other words, when setting float:left for a child div container, and then setting margin-left, it will work, but setting top will have no effect. Top can only work in a floating state when the relative position is set to the child div container. So does it mean that left and top can only work when they are in relative positions? So now we will do an experiment. I deleted float:left;position:relative; in the child div container. There will be no floating or relative position, and then write top:10px;left:10px; The corresponding css code is as follows. clear{width: 200px;background: #f2e;color:#030617;height: 20px;top:50px;left: 10px;};, the result is that the sub-div container has not moved at all on the horizontal and vertical axes, so it turns out that left and top only work when the relative position is set. Margin will work whether you set position or not.

Continue the float floating above. If you now set inherit for float; inherit the browser's floating attribute, at this time we see that the child div does not float and is on the left by default. Similarly, setting the floating style none initial to the child div will not have a floating effect. Only when the left and right floats are set for the sub-div container, the sub-div container will appear floating.

How to clear floats (2)

Below, we use another method to clear floats, the HTML code is still the above code, the css code of the div of the large container: .divcss5{padding:10px 0;width: 100%; left: 50%;right: 50%;background: #007CB5;}, css code of the child div container: .clear{width: 200px;background: #f2e ;color:#030617;height: 20px;float:left;}, what you see at this time is the floating effect, the sub-div container floats on top of the large container. For the same principle, I still use clear:both; we can Use css pseudo-element :after, the following is a very simple css code, write css pseudo-class to the parent container, code: .divcss5:after{content: "1";clear : both;display: block;}, at this time, what we see is that the floating of the large container is cleared, and on the browser, we can see that the sub-div container is included inside the large div container . Viewing the element on the browser, you can see that after is included in the parent container. Therefore, after is equivalent to adding a clear floating div inside the parent container, except that one div layer is missing. This layer is implemented by .divcss5:after .

The above is the detailed content of Solution to div+css floating. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

利用CSS怎么创建渐变色边框？5种方法分享Oct 13, 2021 am 10:19 AM

利用CSS怎么创建渐变色边框？下面本篇文章给大家分享CSS实现渐变色边框的5种方法，希望对大家有所帮助！

css ul标签怎么去掉圆点Apr 25, 2022 pm 05:55 PM

在css中，可用list-style-type属性来去掉ul的圆点标记，语法为“ul{list-style-type:none}”；list-style-type属性可设置列表项标记的类型，当值为“none”可不定义标记，也可去除已有标记。

css与xml的区别是什么Apr 24, 2022 am 11:21 AM

区别是：css是层叠样式表单，是将样式信息与网页内容分离的一种标记语言，主要用来设计网页的样式，还可以对网页各元素进行格式化；xml是可扩展标记语言，是一种数据存储语言，用于使用简单的标记描述数据，将文档分成许多部件并对这些部件加以标识。

css3怎么实现鼠标隐藏效果Apr 27, 2022 pm 05:20 PM

在css中，可以利用cursor属性实现鼠标隐藏效果，该属性用于定义鼠标指针放在一个元素边界范围内时所用的光标形状，当属性值设置为none时，就可以实现鼠标隐藏效果，语法为“元素{cursor:none}”。

rtl在css是什么意思Apr 24, 2022 am 11:07 AM

在css中，rtl是“right-to-left”的缩写，是从右往左的意思，指的是内联内容从右往左依次排布，是direction属性的一个属性值；该属性规定了文本的方向和书写方向，语法为“元素{direction:rtl}”。

css怎么设置i不是斜体Apr 20, 2022 am 10:36 AM

在css中，可以利用“font-style”属性设置i元素不是斜体样式，该属性用于指定文本的字体样式，当属性值设置为“normal”时，会显示元素的标准字体样式，语法为“i元素{font-style:normal}”。

css怎么实现英文小写转为大写Apr 25, 2022 pm 06:35 PM

转换方法：1、给英文元素添加“text-transform: uppercase;”样式，可将所有的英文字母都变成大写；2、给英文元素添加“text-transform:capitalize;”样式，可将英文文本中每个单词的首字母变为大写。

怎么设置rotate在css3的旋转中心点Apr 24, 2022 am 10:50 AM

在css3中，可以用“transform-origin”属性设置rotate的旋转中心点，该属性可更改转换元素的位置，第一个参数设置x轴的旋转位置，第二个参数设置y轴旋转位置，语法为“transform-origin:x轴位置 y轴位置”。

See all articles

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hello Kitty Island Adventure: How To Get Giant Seeds

1 months agoBy尊渡假赌尊渡假赌尊渡假赌

How Long Does It Take To Beat Split Fiction?

4 weeks agoByDDD

R.E.P.O. Save File Location: Where Is It & How to Protect It?

4 weeks agoByDDD

Two Point Museum: All Exhibits And Where To Find Them

1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

SublimeText3 Chinese version

Chinese version, very easy to use

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software