- Which filters can I chain?
- blur, brightness, contrast, drop-shadow, grayscale, hue-rotate, invert, opacity, saturate, sepia. Combine any number — order matters for the final effect.
- Is filter: applied to the whole element or to specific content?
- It applies to the element and all descendants. To affect only an image, put the image in its own wrapper and apply the filter there.
- What about backdrop-filter?
- Separate — use CSS Glassmorphism for backdrop-filter compositions. They differ: filter affects the element; backdrop-filter affects what's behind it.
- Does the preview show real performance cost?
- No — the preview is a static image. On low-end mobile, chained filters can cause scroll jank. Test on device before shipping.