Lazy load images

    <img class="lazyload" data-src="/assets/images/" alt="" />

Inputting mobile and/or webp option

    <picture>
        <source media="(max-width: 850px)" srcset="/assets/images/">
        <source media="(min-width: 850px)" srcset="/assets/images/.webp">
        <img src="/assets/images/" alt="">
    </picture>