responsiveImg = function(options) {
return html`<img src="https://res.cloudinary.com/${cld_cloud_name}/image/fetch/c_limit,w_${Math.round( ( width * window.devicePixelRatio) / 100) * 100},q_auto,f_auto/${options.src}" ${ options.alt ? `alt="${options.alt}"` : '' } />`;
}