Lock ratio with pure css

You can use this technique for pretty much anything that doesn't maintain aspect ratio in a browser. Handy for responsive layouts :D

HTML

<div class="lock-ratio">
  <img src="http://placehold.it/640x360">
  <iframe src="//www.youtube.com/embed/ODFSznljMpA?modestbranding=1&showinfo=0&autohide=1" frameborder="0" allowfullscreen></iframe>
</div>

CSS

.lock-ratio{
    width: 100%;
    position: relative;
  }

  .lock-ratio img{
    width: 100%;
    height: auto;
  }

  .lock-ratio iframe{
    position: absolute;
    top: 0px;
    bottom: 0px;
    left: 0px;
    right: 0px;
    width: 100%;
    height: 100%;
  }

JavaScript

// No JS required!

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Lock ratio with pure css

You can use this technique for pretty much anything that doesn't maintain aspect ratio in a browser. Handy for responsive layouts :D

HTML

CSS

JavaScript

Please Whitelist JSFiddle in your content blocker.

Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console