x
 
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>picture-Tag</title>  
</head>
<body>
<picture>
  <source media="(min-width: 800px)" srcset="https://ekiwi.de/tryit/files/a_welli.jpg">
  <source media="(min-width: 465px)" srcset="https://ekiwi.de/tryit/files/a_welli_xs.jpg">
  <img src="https://ekiwi.de/tryit/files/a_welli_xs.jpg" alt="Wellis" style="width:auto;">
</picture> 
 
</body>
</html>