Responsive images in da house

by FEVR

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@decarola

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Immagini responsive

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Modo

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Immagini responsive

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• Best New Web Technology • Best Collaborative Project

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RWD

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• CSS Media queries • Griglie ﬂuide • Immagini ﬂessibili RWD

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Ada are all’ambiente

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• Densità di pixel

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• Densità di pixel • Molteplici layout

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• Densità di pixel • Molteplici layout • Stesso rapporto, diversa risoluzione

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• Densità di pixel • Molteplici layout • Stesso rapporto, diversa risoluzione. • Art direction (crop)

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• Densità di pixel • Molteplici layout • Stesso rapporto, diversa risoluzione. • Art direction (crop) • Formati esotici

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APNG WEBP

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• Densità di pixel • Molteplici layout • Stesso rapporto, diversa risoluzione. • Art direction (crop) • Formati esotici • Preload

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Style faster than your CSS

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63% h p://h parchive.org/interesting.php#bytesperpage

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Più veloce ~20%

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Preload

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Preload

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Can I kick it?

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SVG

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Slow and low

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Clown Car

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Estelle Weyl

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The Clown Car Technique image {display: none;} #small {display: block} @media screen and (min-width: 401px) and (max-width: 700px) { #medium {display: block} #small {display: none} } @media screen and (min-width: 701px) and (max-width: 1000px) { #big {display: block} #small {display: none} } @media screen and (min-width: 1001px) { #huge {display: block} #small {display: none;} }

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image {display: none;} #small {display: block} @media screen and (min-width: 401px) and (max-width: 700px) { #medium {display: block} #small {display: none} } @media screen and (min-width: 701px) and (max-width: 1000px) { #big {display: block} #small {display: none} } @media screen and (min-width: 1001px) { #huge {display: block} #small {display: none;} }

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Preload, motherf*#ker

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Clown Car Technique svg { background-size: 100% 100%; background-repeat: no-repeat; } svg { background-image: url(images/small.png); } @media screen and (min-width: 768px) { svg { background-image: url(images/medium.png); } }

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CSP content security policy

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It’s tricky

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srcset

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• Proporzioni uguali • Dimensioni diverse • Retina srcset

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Suggerimento

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Suggerimento

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Schermo più grande ≠ Immagine più grande

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sizes

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src="narcos.jpg" srcset="narcos-320.jpg 320w, narcos-640.jpg 640w, narcos-840.jpg 840w, narcos-1100.jpg 1100w" sizes="(min-width: 900px) 32vw, (min-width: 600px) 50vw, 100vw" alt="Noys Narcos"/>

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Prima condizione valida

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Coolio!

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Contenuto - Presentazione

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HTML - CSS

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Preload

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Compromesso

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Art directed

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Art directed

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Suggerimento Dire iva

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Shopify

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Bonus track

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type

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• WEBP • APNG • JPEG-2000 • JPEG-XR

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• WEBP • APNG • JPEG-2000 • JPEG-XR

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Sintesi

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SVG

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SVG

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SVG

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srcset

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srcset

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h p://dpi.lv

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Come preparo le immagini?

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Size ma ers

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Client Hints

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Server side

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