css - Media Queries for Ratio not triggering -


i trying test ratio media queries:

for example: 

@media screen , (min-aspect-ratio: 8/5) { ... }

see full code:

<!doctype html>  <html lang="en"> <head>   <meta charset="utf-8">    <title></title>    <style type="text/css">      .mq {     border: 2px solid;     padding: 20px;      width: 300px;     resize: both;     overflow: auto; }  @media screen , (min-aspect-ratio: 8/5) {      .mq {         background-color: red;     }  }    </style>  </head>  <body>  <div class="mq">     text here. div can resized. </div>  </body> </html>

the problem code above supposed go red when ratio 18/5 it's red.

what wrong code?

your code fine, css says need ratio of @ least 8/5, if drag screen size around should see change when window taller wide.

if want have effect div, not window, you'll need handle javascript instead of media query.

var $div = $('.mq'); $div.change(function() {     if ($div.width() / $div.height() < 1.6) {         $div.css('background-color', 'white')     } else {         $div.css('background-color', 'red')     } });

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