Slider

(compose/material3 @ 19991f2c, Slider.kt; values in slider.css / slider-defaults.css, lines in PARITY.md):

• Layout (SliderImpl L878–1082): minimumInteractiveComponentSize (≥ 48dp across); the track is the slider less the thumb width, placed thumb width / 2 in; a thumb is centred on its value: track × fraction, or with steps (off the first and last stop) (track − 2 × corner) × fraction + corner. __track is that box (the pointer target, the full 48dp across) and a size container: 100cqi (vertical: 100cqb) is the track length.
• Track (SliderDefaults.drawTrack L2398–2671): parts end ThumbWidth / 2 + ThumbTrackGapSize (2 + 6dp) from a thumb centre, with 2dp inside corners towards the thumb and the track corner size outside (default Track: thickness / 2; S–XL: the token DB corner size). A part is drawn only when longer than a threshold: the corner size (the inside corner for range / centered active parts), or 0 when corners shrink (Track(trackCornerSize) and CenteredTrack, without steps). CSS scales over-large radii like Skia's RRect, so short parts shrink their corners. Centered (CenteredTrack): the active part runs between the centre and the thumb; the gap on the centre side of the thumb has no thumb width while the thumb is past the centre. Booleans come from round(up, x, step): 1 (or the track length) for any x > 0, 0 for x = 0.
• Stop indicators (drawStopIndicator): 4dp dots one corner size in from the end of the inactive part (a range or centered slider: both ends), in the active track color (owner decision M8 #20), drawn with their part. None with an inset icon (SliderWithTrackIconsSample).
• Ticks: dots at lerp(corner, length − corner, i / (steps + 1)); the stop indicators replace the last (range / centered: and the first); dots within a thumb gap (or a centered slider's centre gap) are not drawn; active ticks (on the active part) the inactive track color, others the active track color (owner decision M8 #20).
• Thumb (ThumbContent L2727–2773): ThumbWidth × ThumbHeight (vertical: swapped), its handle's width (height) halved while pressed or dragged ([data-dragging]) or keyboard focused, at once: no animation (owner decision M8 #17). The hand cursor over the thumb. No ripple or state layer (Compose's slider has none). Focus: the project ring around the handle; it does not widen the gaps (owner decision M8 #23).
• Colors (defaultSliderColors L1716–1757): disabled parts translucent, the disabled handle composited over surface. Hover changes nothing (owner decision M8 #3).
• Sizes (owner decision M8 #16): the m3.material.io token DB (slider-defaults.css): track thickness 16 / 24 / 40 / 56 / 96dp, handle 44 / 44 / 44 / 68 / 108dp (M: the DB, not the Specs table's 52dp; D19 (8), SOURCES register #68), corner 8 / 8 / 12 / 16 / 28dp; S–XL shrink corners like the Compose samples' Track(trackCornerSize). Stop indicators sit one corner size in, as Compose draws them (Slider.kt L2550–2566; the token DB's 4dp trailing space is not used: D19 (9), register #70).
• Inset icon (owner decision M8 #18): M / L / XL 24 / 24 / 32dp, padding 6 / 6 / 8dp; on the active part when icon + 2 × padding fits (SliderWithTrackIconsSample), else at the start of the inactive part (m3.material.io "the icon moves to the inactive track"); colors: the tick colors of its part.
• Value indicator (owner decision M8 #19): SliderTokens.ValueIndicator* (inverse surface, label large, 12dp above the handle), 48 × 44dp (m3.material.io Measurements), fully rounded (the Specs redline; register #69), while dragging or keyboard focused; a vertical slider's shows at the inline start of the thumb.