Deliver responsive game art with accurate srcset and sizes
The practical problem
A card that occupies 300 CSS pixels on a phone need not download a 1600-pixel marketing illustration; choose candidates based on displayed slot width and pixel density.
Implementation protocol
Produce and label several real width variants, provide a sizes expression matching CSS and retain an ordinary src fallback with alt. Inspect the browser currentSrc property instead of assuming it selects the smallest file.
Worked scenario
For a card displayed 300 pixels wide at DPR 2, a 640-pixel candidate is a reasonable starting point. A 960-pixel candidate may be useful on wider displays.
What could go wrong
An inaccurate sizes attribute can choose oversized files.
Acceptance criteria
Compare network bytes on 360-pixel and 1440-pixel viewports at multiple DPR settings.
Source material and evidence boundaries
For the topic Deliver responsive game art with accurate srcset and sizes, use the sources listed below to check relevant methods. Any worked figures illustrate a scenario, not measured MojPlayWin performance. Consult the shared evidence standards before applying the method.