CSS 在相对父 div 中固定定位的 div

Fixed positioned div within a relative parent div

提问by Gavin Wood

I am currently building a responsive website and need a menu to be fixed, thus not scrolling when the rest of the site scrolls. the issue is that it is a fluid layout and i want the "fixed positioned" menu item to be fixed relative to the containing parent element and not to browser window. is there anyway this can be done?

我目前正在构建一个响应式网站，需要修复一个菜单，因此在网站的其余部分滚动时不会滚动。问题是它是一个流体布局，我希望“固定定位”菜单项相对于包含的父元素而不是浏览器窗口固定。有没有办法做到这一点？

回答by Leo

This question came first on Google although an old one so I'm posting the working answer I found, which can be of use to someone else.

这个问题首先出现在谷歌上，虽然是旧问题，所以我发布了我找到的工作答案，这对其他人有用。

This requires 3 divs including the fixed div.

这需要 3 个 div，包括固定 div。

HTML

HTML

<div class="wrapper">
    <div class="parent">
        <div class="child"></div>
    </div>
</div>

CSS

CSS

.wrapper { position:relative; width:1280px; }
    .parent { position:absolute; }
        .child { position:fixed; width:960px; }

回答by Fuzzical Logic

Gavin,

加文，

The issue you are having is a misunderstanding of positioning. If you want it to be "fixed" relative to the parent, then you really want your #fixedto be position:absolutewhich will update its position relative to the parent.

您遇到的问题是对定位的误解。如果你希望它是“固定”相对于父，那么你真的想你#fixed是position:absolute其中相对于父其位置将更新。

This questionfully describes positioning types and how to use them effectively.

这个问题完整地描述了定位类型以及如何有效地使用它们。

In summary, your CSS should be

总之，你的 CSS 应该是

#wrap{ 
    position:relative;
}
#fixed{ 
    position:absolute;
    top:30px;
    left:40px;
}

回答by KernelDeimos

An easy solution that doesn't involve resorting to JavaScript and will not break CSS transforms is to simply have a non-scrolling element, the same size as your scrolling element, absolute-positioned over it.

一个不涉及使用 JavaScript 并且不会破坏 CSS 转换的简单解决方案是简单地使用一个非滚动元素，与你的滚动元素大小相同，绝对定位在它上面。

The basic HTML structure would be

基本的 HTML 结构是

CSS

CSS

<style>
    .parent-to-position-by {
        position: relative;
        top: 40px; /* just to show it's relative positioned */
    }
    .scrolling-contents {
        display: inline-block;
        width: 100%;
        height: 200px;
        line-height: 20px;
        white-space: nowrap;
        background-color: #CCC;
        overflow: scroll;
    }
    .fixed-elements {
        display: inline-block;
        position: absolute;
        top: 0;
        left: 0;
    }
    .fixed {
        position: absolute; /* effectively fixed */
        top: 20px;
        left: 20px;
        background-color: #F00;
        width: 200px;
        height: 20px;
    }
</style>

HTML

HTML

<div class="parent-to-position-by">
    <div class="fixed-elements">
        <div class="fixed">
            I am &quot;fixed positioned&quot;
        </div>
    </div>
    <div class="scrolling-contents">
        Lots of contents which may be scrolled.
    </div>
</div>

• parent-to-position-bywould be the relative divto position something fixed with respect to.
• scrolling-contentswould span the size of this divand contain its main contents
• fixed-elementsis just an absolute-positioned divspanning the same space over top of the scrolling-contentsdiv.
• by absolute-positioning the divwith the fixedclass, it achieves the same effect as if it were fixed-positioned with respect to the parent div. (or the scrolling contents, as they span that full space)

• parent-to-position-by将是相div对于固定的东西的相对位置。
• scrolling-contents将跨越此大小div并包含其主要内容
• fixed-elements只是一个绝对定位的div跨越相同空间的scrolling-contentsdiv.
• 通过div使用fixed类绝对定位，它实现了与相对于父类固定定位一样的效果div。（或滚动内容，因为它们跨越了整个空间）

Here's a js-fiddle with a working example

这是一个带有工作示例的 js-fiddle

回答by JCOC611

This is possible if you move the fixed <div>using margins and not positions:

如果您<div>使用保证金而不是仓位移动固定资产，这是可能的：

#wrap{ position:absolute;left:100px;top:100px; }
#fixed{ 
   position:fixed;
   width:10px;
   height:10px;
   background-color:#333;
   margin-left:200px;
   margin-top:200px;
}

And this HTML:

而这个 HTML：

<div id="wrap">
   <div id="fixed"></div>
</div>

Play around with this jsfiddle.

玩这个jsfiddle。

回答by Lohit Bisen

Try postion:sticky on parent element.

在父元素上尝试 postion:sticky。

回答by afable

A simple thing you can do is position your fixed DIV relative to the rest of your page with % values.

您可以做的一件简单的事情是使用 % 值将固定 DIV 相对于页面的其余部分定位。

Check out this jsfiddle herewhere the fixed DIV is a sidebar.

在此处查看此jsfiddle，其中固定的 DIV 是侧边栏。

div#wrapper {
    margin: auto;
    width: 80%;
}

div#main {
    width: 60%;
}

div#sidebar {
    position: fixed;
    width: 30%;
    left: 60%;
}

And a brief picture below describing the layout above:

下面是描述上述布局的简要图片：

回答by Mandar Kawtakwar

you can fix the wrapper using absolute positioning. and the give inside div a fixed position.

您可以使用绝对定位来修复包装器。并给内部 div 一个固定位置。

.wrapper{
 position:absolute;
 left:10%;// or some valve in px
 top:10%; // or some valve in px
 }

and div inside that

和里面的div

.wrapper .fixed-element{ 
position:fixed;
width:100%;
height:100%;
margin-left:auto; // to center this div inside at center give auto margin
margin-right:auto;
}

try this It might work for you

试试这个它可能对你有用

回答by avrahamcool

here is a more generic solution, that don't depends on the Menu/Header height. its fully responsive, Pure CSS solution, Works great on IE8+, Firefox, Chrome, Safari, opera. supports Content scrolling without affecting the Menu/Header.

这是一个更通用的解决方案，它不依赖于菜单/标题高度。其完全响应式的纯 CSS 解决方案，在 IE8+、Firefox、Chrome、Safari、Opera 上运行良好。支持内容滚动而不影响菜单/标题。

Test it with that Working Fiddle

用那个测试它 Working Fiddle

The Html:

Html：

<div class="Container">
    <div class="First">
        <p>The First div height is not fixed</p>
        <p>This Layout has been tested on: IE10, IE9, IE8, FireFox, Chrome, Safari, using Pure CSS 2.1 only</p>
    </div>
    <div class="Second">
        <div class="Wrapper">
            <div class="Centered">
                <p>The Second div should always span the available Container space.</p>
                <p>This content is vertically Centered.</p>
            </div>
        </div>
    </div>
</div>

The CSS:

CSS：

*
{
    margin: 0;
    padding: 0;
}

html, body, .Container
{
    height: 100%;
}

    .Container:before
    {
        content: '';
        height: 100%;
        float: left;
    }

.First
{
    /*for demonstration only*/
    background-color: #bf5b5b;
}

.Second
{
    position: relative;
    z-index: 1;
    /*for demonstration only*/
    background-color: #6ea364;
}

    .Second:after
    {
        content: '';
        clear: both;
        display: block;
    }

/*This part his relevant only for Vertically centering*/
.Wrapper
{
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: auto;
}
    .Wrapper:before
    {
        content: '';
        display: inline-block;
        vertical-align: middle;
        height: 100%;
    }

.Centered
{
    display: inline-block;
    vertical-align: middle;
}

回答by Fely Spring

Sample solution. Check, if this is what you need.

样品溶液。检查一下，这是否是您所需要的。

<div class="container">
   <div class="relative">      
      <div class="absolute"></div>      
      <div class="content">
        <p>
          Content here
        </p>
      </div>
    </div>
 </div>

And for CSS

而对于 CSS

.relative { 
  position: relative;
}

.absolute {
  position: absolute;
  top: 15px;
  left: 25px;   
}

See it on codepen https://codepen.io/FelySpring/pen/jXENXY

在 codepen 上查看https://codepen.io/FelySpring/pen/jXENXY