<picture>

gistfile1.txt

<picture>
    <source srcset="[email protected] 1x,
                    [email protected] 2x"
            media="(min-width: 600px)"
            type="image/webp">
    <source srcset="[email protected] 1x,
                    [email protected] 2x"
            media="(min-width: 600px)">
    <source srcset="[email protected] 1x,
                    [email protected] 2x"
            type="image/webp">
    <img src="[email protected]"
         srcset="[email protected] 2x"
         alt="Девушка пьёт кофе">    
</picture>