How to vertically and horizontally center a div of unknown height

问题

I tried using the flexbox method, table method, and some other methods for vertically centering a div of unknown height, but my div is not getting centered correctly. I want the width of the centered div to be 50% of the window width or have a min-width of 200px.

.content {
  background-color: violet;
  min-width: 200px;
  width: 50%;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0px 1px 7px 1px rgba(0, 0, 0, 1);
}

.outer-container {
  display: table;
  width: 100%;
  background-color: violet;
}

.container {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}

<body>
  <div class="outer-container">
    <div class="container">

      <div class="content">
        <div class="title-class">
          Hello there
        </div>
      </div>
    </div>
  </div>
</body>

回答1:

Using a flexbox, here's all the code you need:

HTML

<div class="container">
    <div class="content">
        <div class="title-class">Hello there</div>
    </div>
</div>

CSS

html, body { height: 100%; }

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: violet;
    height: 100%;
}

.content {
    background-color: violet;
    width: 50%;
    text-align: center;
    box-shadow: 0px 1px 7px 1px rgba(0, 0, 0, 1);

}

DEMO

As an alternative, here's the table method:

How to Center Elements Vertically, Horizontally or Both

来源：https://stackoverflow.com/questions/32343148/how-to-vertically-and-horizontally-center-a-div-of-unknown-height

标签

html

css

vertical-alignment

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