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Get Started Free →Use when reviewing image assets, markup, and CDN or build transforms related to Support high-DPI retina displays. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-03 | ✗→✓ | ▲ Improved | -2% | 0% |
| case-09 | ✓→✗ | ▼ Worse | -22% | 0% |
| case-01 | ✓→✓ | ＝ Same ✓ | -23% | 0% |
| case-18 | ✓→✓ | ＝ Same ✓ | -16% | 0% |
| case-19 | ✓→✓ | ＝ Same ✓ | -35% | 0% |
Standard images look blurry on retina displays (2x, 3x pixel density)—high-resolution assets ensure sharp visuals on modern devices.
Check if high-resolution images are provided for retina displays (2x, 3x).
Add retina-ready images using srcset or CSS image-set for high-DPI displays.
Explain how retina images ensure sharp visuals on high-density displays.
Review image assets, markup, and delivery configuration related to Support high-DPI retina displays. Flag exact files or components where format choice, sizing, or loading behavior violates the rule, and describe how to confirm the fix in DevTools.
For full implementation details, code examples, and framework-specific guidance, see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/images/retina-display
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