tpai
5/10/2017 - 1:44 PM

Center middle image and maintain aspect ratio // source http://jsbin.com/yefeju

Center middle image and maintain aspect ratio

// source http://jsbin.com/yefeju

jsbin.yefeju.js
content_copyfile_download
'use strict';

var images = document.getElementsByClassName('image');

Array.prototype.map.call(images, function (img) {
  var temp = new Image();
  temp.src = img.src;
  var aspectRatio = temp.width / temp.height;
  if (aspectRatio > 1) {
    img.style = 'height: 100%';
  } else {
    img.style = 'width: 100%';
  }
});
jsbin.yefeju.css
content_copyfile_download
html, body {
    height: 100%;
}

.center {
    height: 100%;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.section {
  width: 300px;
  height: 300px;
  margin: 1rem;
  
  display: flex;
  flex-wrap: nowrap;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.container {
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
    padding-top: 100%;
}

.image {
    position: absolute;
    display: block;
    right: 0;
    bottom: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
index.html
content_copyfile_download
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Center middle image and maintain aspect ratio</title>
<style id="jsbin-css">
html, body {
    height: 100%;
}

.center {
    height: 100%;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.section {
  width: 300px;
  height: 300px;
  margin: 1rem;
  
  display: flex;
  flex-wrap: nowrap;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.container {
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
    padding-top: 100%;
}

.image {
    position: absolute;
    display: block;
    right: 0;
    bottom: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
</style>
</head>
<body>
  <div class="center">
    <div class="section">
      Landscape Image
      <div class="container">
        <img src="http://unsplash.it/1600/900" class="image" />
      </div>
    </div>
    <div class="section">
      Portrait Image
      <div class="container">
        <img src="http://unsplash.it/900/1600" class="image" />
      </div>
    </div>
  </div>
<script id="jsbin-javascript">
'use strict';

var images = document.getElementsByClassName('image');

Array.prototype.map.call(images, function (img) {
  var temp = new Image();
  temp.src = img.src;
  var aspectRatio = temp.width / temp.height;
  if (aspectRatio > 1) {
    img.style = 'height: 100%';
  } else {
    img.style = 'width: 100%';
  }
});
</script>

<script id="jsbin-source-html" type="text/html"><!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Center middle image and maintain aspect ratio</title>
</head>
<body>
  <div class="center">
    <div class="section">
      Landscape Image
      <div class="container">
        <img src="//unsplash.it/1600/900" class="image" />
      </div>
    </div>
    <div class="section">
      Portrait Image
      <div class="container">
        <img src="//unsplash.it/900/1600" class="image" />
      </div>
    </div>
  </div>
</body>
</html></script>

<script id="jsbin-source-css" type="text/css">html, body {
    height: 100%;
}

.center {
    height: 100%;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.section {
  width: 300px;
  height: 300px;
  margin: 1rem;
  
  display: flex;
  flex-wrap: nowrap;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.container {
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
    padding-top: 100%;
}

.image {
    position: absolute;
    display: block;
    right: 0;
    bottom: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}</script>

<script id="jsbin-source-javascript" type="text/javascript">const images = document.getElementsByClassName('image');

Array.prototype.map.call(images, img => {
  let temp = new Image();
  temp.src = img.src;
  const aspectRatio = temp.width / temp.height;
  if (aspectRatio > 1) {
    img.style = 'height: 100%';
  } else {
    img.style = 'width: 100%';
  }
});</script></body>
</html>