为什么宽度：100％不在div {display：table-cell}上工作？

Question

I'm trying to vertically and horizontally center some content overlaying an image slide (flexslider). There were some similar questions to this one, but I couldn't find a satisfactory solution that applied directly to my specific problem. Because of the limitations of FlexSlider, I cannot use position: absolute; on the img tag in my implementation.

I almost have workaround below working. The only problem is I cannot get the width & height declarations to work on inner-wrapper div with the display: table-cell property.

Is this standard behavior, or am I missing something with my code? If it's standard behavior, what's the best solution to my problem?

HTML

<ul>
    <li>
        <img src="#">
        <div class="outer-wrapper">
            <div class="inner-wrapper">
                <h1>My Title</h1>
                <h5>Subtitle</h5>
            </div>
        </div>
    </li>
</ul>

CSS

html, body {
    margin: 0; padding: 0;
    width: 100%; height: 100%;
}

ul {
    background: #CCC;
    height: 100%;
    width: 100%;
    list-style-position: outside;
    margin: 0; padding: 0;
}

li {
    width: 100%;
    display: table;
}

img {
    width: 100%;
    height: 410px;
}

.outer-wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    margin: 0; padding: 0;
}

.inner-wrapper {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
    width: 100%;
    height: 100%;
}

Note: the centered content will be more than 1 element, so I can't use the line-height trick.

jsFiddle .

Answer 1

Putting display:table; inside .outer-wrapper seemed to work...

JSFiddle Link

---

EDIT: Two Wrappers Using Display Table Cell

I would comment on your answer but i have too little rep :( anyways...

Going off your answer , seems like all you need to do is add display:table; inside .outer-wrapper (Dejavu?), and you can get rid of table-wrapper whole-heartedly.

JSFiddle

But yeah, the position:absolute lets you place the div over the img , I read too quickly and thought that you couldn't use position:absolute at all, but seems like you figured it out already. Props!

I'm not going to post the source code, after all its 99% timshutes's work, so please refer to his answer, or just use my jsfiddle link

Update: One Wrapper Using Flexbox

It's been a while, and all the cool kids are using flexbox:

<div style="display: flex; flex-direction: column; justify-content: center; align-items: center;">
    stuff to be centered
</div>

Full JSFiddle Solution

Browser Support ( source ): IE 11+, FireFox 42+, Chrome 46+, Safari 8+, iOS 8.4+ ( -webkit- prefix), Android 4.1+ ( -webkit- prefix)

CSS Tricks: a Guide to Flexbox

How to Center in CSS : input how you want your content to be centered, and it outputs how to do it in html and css. The future is here!

Answer 2

I figured this one out. I know this will help someone someday.

How to Vertically & Horizontally Center a Div Over a Relatively Positioned Image

The key was a 3rd wrapper. I would vote up any answer that uses less wrappers.

HTML

<div class="wrapper">
    <img src="my-slide.jpg">
    <div class="outer-wrapper">
        <div class="table-wrapper">
            <div class="table-cell-wrapper">
                <h1>My Title</h1>
                <p>Subtitle</p>
            </div>
        </div>
    </div>
</div>

CSS

html, body {
margin: 0; padding: 0;
width: 100%; height: 100%;
}

ul {
    width: 100%;
    height: 100%;
    list-style-position: outside;
    margin: 0; padding: 0;
}

li {
    width: 100%;
    display: table;
}

img {
    width: 100%;
    height: 100%;
}

.outer-wrapper {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  margin: 0; padding: 0;
}

.table-wrapper {
  width: 100%;
  height: 100%;
  display: table;
  vertical-align: middle;
  text-align: center;
}

.table-cell-wrapper {
  width: 100%;
  height: 100%;  
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}

You can see the working jsFiddle here.

Answer 3

I discovered that the higher the value of 'width' is, the smaller the box width is made and vice versa. I found this out because I had the same problem earlier. So:

.inner-wrapper {
    width: 1%;
}

solves the problem.

Answer 4

Welcome to 2017 these days will using vW and vH do the trick

 html, body { margin: 0; padding: 0; width: 100%; height: 100%; } ul { background: #CCC; height: 100%; width: 100%; list-style-position: outside; margin: 0; padding: 0; } li { width: 100%; display: table; } img { width: 100%; height: 410px; } .outer-wrapper { position: absolute; width: 100%; height: 100%; top: 0; margin: 0; padding: 0; } .inner-wrapper { display: table-cell; vertical-align: middle; text-align: center; width: 100vw; /* only change is here "%" to "vw" ! */ height: 100vh; /* only change is here "%" to "vh" ! */ } 

 <ul> <li> <img src="#"> <div class="outer-wrapper"> <div class="inner-wrapper"> <h1>My Title</h1> <h5>Subtitle</h5> </div> </div> </li> </ul> 

Answer 5

Your 100% means 100% of the viewport, you can fix that using the vw unit besides the % unit at the width. The problem is that 100vw is related to the viewport, besides % is related to parent tag. Do like that:

.table-cell-wrapper {
    width: 100vw;
    height: 100%;  
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

Answer 6

How about this? (jsFiddle link)

CSS

ul {
    background: #CCC;
    height: 1000%;
    width: 100%;
    list-style-position: outside;
    margin: 0; padding: 0;
    position: absolute;
}
li {
 background-color: #EBEBEB;
    border-bottom: 1px solid #CCCCCC;
    border-right: 1px solid #CCCCCC;
    display: table;
    height: 180px;
    overflow: hidden;
    width: 200px;
}
.divone{
    display: table-cell;
    margin: 0 auto;
    text-align: center;
    vertical-align: middle;
    width: 100%; 

}
img {
    width: 100%;
    height: 410px;
}
.wrapper {
  position: absolute;
}

Answer 7

Just add min-height:100% and min-width:100% and it will work. I had the same problem. You don't need a 3th wrapper