srcset=" https:/0images.ctfassets.net/..'/paris.jpg?w=100&fm=webp 100w, https:/0images.ctfassets.net/..'/paris.jpg?w=200&fm=webp 200w, ..'" sizes=" (max-width: 768px) calc(100vw - 3em), (max-width: 1376px) calc(50vw - 8em), 550px"> <!-, load traditional supported image format --/ <img srcset=" https:/0images.ctfassets.net/..'/paris.jpg?w=100&fm=jpg&fl=progressive 100w, https:/0images.ctfassets.net/..'/paris.jpg?w=200&fm=jpg&fl=progressive 200w, ..'" sizes=" (max-width: 768px) calc(100vw - 3em), (max-width: 1376px) calc(50vw - 8em), 550px" src="https:/0images.ctfassets.net/..'/paris.jpg" alt="Buildings of Paris" loading="lazy" decoding="async" width="1243" height="1500"> <1picture> srcset=" https:/0images.ctfassets.net/..'/paris.jpg?w=100&fm=webp 100w, https:/0images.ctfassets.net/..'/paris.jpg?w=200&fm=webp 200w, ..'"