开发者

How to vertically center <div> inside the parent element with CSS? [duplicate]

This question already has answers here: How can I vertically align elements in a div? (28 answers) Closed 3 years ago.

I'm trying to make a small username and password input box.

I would like to ask, how do you vertically align a div?

What I have is:

<div id="Login" class="BlackStrip floatright">
   <div id="Username" class="floatleft">Username<br>Password</div>
   <div id="Form" class="floatleft">
   <form action="" method="post">
      <input type="text" border="0"><br>
      <input type="password" border="0">
   </form>
   </div>
</div>

How can I make the div with id Username and Form to vertically开发者_运维百科 align itself to the center? I've tried to put:

vertical-align: middle;

in CSS for the div with id Login, but it doesn't seem to work. Any help would be appreciated.


The best approach in modern browsers is to use flexbox:

#Login {
    display: flex;
    align-items: center;
}

Some browsers will need vendor prefixes. For older browsers without flexbox support (e.g. IE 9 and lower), you'll need to implement a fallback solution using one of the older methods.

Recommended Reading

  • Browser support
  • A Guide to Flexbox
  • Using CSS Flexible Boxes


This can be done with 3 lines of CSS and is compatible back to (and including) IE9:

.element {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
}

Example: http://jsfiddle.net/cas07zq8/

credit


You can vertically align a div in another div. See this example on JSFiddle or consider the example below.

HTML

<div class="outerDiv">
    <div class="innerDiv"> My Vertical Div </div>
</div>

CSS

.outerDiv {
    display: inline-flex;  // <-- This is responsible for vertical alignment
    height: 400px;
    background-color: red;
    color: white;
}

.innerDiv {
    margin: auto 5px;   // <-- This is responsible for vertical alignment
    background-color: green;   
}

The .innerDiv's margin must be in this format: margin: auto *px;

[Where, * is your desired value.]

display: inline-flex is supported in the latest (updated/current version) browsers with HTML5 support.

It may not work in Internet Explorer :P :)

Always try to define a height for any vertically aligned div (i.e. innerDiv) to counter compatibility issues.


I'm pretty late to the party, but I came up with this myself and it's one of my favorite quick hacks for vertical alignment. It's crazy simple, and easy to understand what's going on.

You use the :before css attribute to insert a div into the beginning of the parent div, give it display:inline-block and vertical-align:middle and then give those same properties to the child div. Since vertical-align is for alignment along a line, those inline divs will be considered a line.

Make the :before div height:100%, and the child div will automatically follow and align in the middle of a very tall "line."

.parent:before, .child {
    display:inline-block;
    vertical-align:middle;
}
.parent:before {
    content:""; // so that it shows up
    height:100%; // so it takes up the full height
}

Here's a fiddle to demonstrate what I'm talking about. The child div can be any height, and you never have to modify its margins/paddings.
And here's a more explanatory fiddle.

If you're not fond of :before, you can always manually put in a div.

<div class="parent">
    <div class="before"></div>
    <div class="child">
        content
    </div>
</div>

And then just reassign .parent:before to .parent .before


If you know the height, you can use absolute positioning with a negative margin-top like so:

#Login {
    width:400px;
    height:400px;
    position:absolute;
    top:50%;
    left:50%;
    margin-left:-200px; /* width / -2 */
    margin-top:-200px; /* height / -2 */
}

Otherwise, there's no real way to vertically center a div with just CSS


In my firefox and chrome work this:

CSS:

display: flex;
justify-content: center;     // vertical align
align-items: center;         // horizontal align


I found this site useful: http://www.vanseodesign.com/css/vertical-centering/ This worked for me:

HTML

<div id="parent">
    <div id="child">Content here</div>
</div>

CSS

#parent {
    padding: 5% 0;
}

#child {
    padding: 10% 0;
}


@GáborNagy's comment on another post was the simplest solution I could find and worked like a charm for me, since he brought a jsfiddle I'm copying it here with a small addition:

CSS:

#wrapper {
    display: table;
    height: 150px;
    width: 800px;
    border: 1px solid red;
}

#cell {
    display: table-cell;
    vertical-align: middle;
}

HTML:

<div id="wrapper">
    <div id="cell">
        <div class="content">
            Content goes here
        </div>
    </div>
</div>

If you wish to also align it horizontally you'd have to add another div "inner-cell" inside the "cell" div, and give it this style:

#inner-cell{
      width: 250px;
      display: block;
      margin: 0 auto;
}


Vertically aligning has always been tricky.

Here I have covered up some method of vertically aligning a div.

http://jsfiddle.net/3puHE/

HTML:

<div style="display:flex;">

<div class="container table">
<div class="tableCell">
<div class="content"><em>Table</em> method</div>
</div>
</div>

<div class="container flex">
<div class="content new"><em>Flex</em> method<br></div>
</div>

<div class="container relative">
<div class="content"><em>Position</em> method</div>
</div>

<div class="container margin">
<div class="content"><em>Margin</em> method</div>
</div>

</div>

CSS:

em{font-style: normal;font-weight: bold;}
.container {
    width:200px;height:200px;background:#ccc;
    margin: 5px; text-align: center;
}
.content{
    width:100px; height: 100px;background:#37a;margin:auto;color: #fff;
}
.table{display: table;}
.table > div{display: table-cell;height: 100%;width: 100%;vertical-align: middle;}
.flex{display: flex;}
.relative{position: relative;}
.relative > div {position: absolute;top: 0;left: 0;right: 0;bottom: 0;}
.margin > div {position:relative; margin-top: 50%;top: -50px;}


http://jsfiddle.net/dvL512e7/

Unless the aligned div has fixed height, try using the following CSS to the aligned div:

{
  margin: auto;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  display: table;
}


I needed to specify min-height

#login
    display: flex
    align-items: center
    justify-content: center
    min-height: 16em


if you are using fix height div than you can use padding-top according your design need. or you can use top:50%. if we are using div than vertical align does not work so we use padding top or position according need.


simplest way to center your div element is to use this class with following properties.

.light {
    margin: auto;
    width: 50%;
    border: 3px solid green;
    padding: 10px;
}


Centering the child elements in a div. It works for all screen sizes

#parent {
  background-color: red;
  height: 160px;
  
  display: flex;
  
  /*vertical-align */
  align-items: center;
  
   /*horizontal align*/
  justify-content: center;
}
    
#child {
  background-color: orange;
  height: 20px;
  padding: 10px;
}
<div id="parent">
   <div id="child">Content here</div>
</div>


I found a way that works great for me. The next script inserts an invisible image (same as bgcolor or a transparant gif) with height equal to half the size of the white-space on the screen. The effect is a perfect vertical-alignment.

Say you have a header div (height=100) and a footer div (height=50) and the content in the main div that you would like to align has a height of 300:

<script type="text/javascript" charset="utf-8">
var screen = window.innerHeight;
var content = 150 + 300;
var imgheight = ( screen - content) / 2 ;
document.write("<img src='empty.jpg' height='" + imgheight + "'>"); 
</script>   

You place the script just before the content that you want to align!

In my case the content I liked to align was an image (width=95%) with an aspect ratio of 100:85 (width:height).Meaning the height of the image is 85% of it's width. And the Width being 95% of the screenwidth.

I therefore used:

var content = 150 + ( 0.85 * ( 0.95 * window.innerWidth ));

Combine this script with

<body onResize="window.location.href = window.location.href;">

and you have a smooth vertical alignment.

Hope this works for you too!


have you try this one?

.parentdiv {
 margin: auto;
 position: absolute;
 top: 0; left: 0; bottom: 0; right: 0;
 height: 300px; // at least you have to specify height
}

hope this helps


divs can't be vertically aligned that way, you can however use margins or position:relative to modify its location.

0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜