∞ forever components

Drag & Reorder

Snap Slider

Ochre-accent range slider with 9 tick detents; thumb flicks with spring momentum and rubber-bands at ends. Self-demos on idle, accepts keyboard input.

cssmedium complexitymoderate motionpointer

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When to use it

Settings panels, volume/scrubber controls, or any stepped range input that benefits from tactile snap feedback and visible momentum.

When not to

Continuous (non-stepped) value inputs, or contexts where the auto-demo loop would confuse users — remove the demoStep timer before shipping.

Working with an AI agent

Every component ships agent-ready metadata. An example instruction for this one:

Change STEPS from 8 to 4, set accent color --ac to #BFA98C, and slow the spring by reducing K from 0.22 to 0.12. Theme: dark tokens live in :root, the light variant in :root[data-theme="light"]; ?theme=light or a {type:'forever:theme'} postMessage switches at runtime.

Safe to edit

  • step count (STEPS=8)
  • spring stiffness (K=0.22)
  • spring damping (DMP=0.66)
  • accent color (--ac:#A68D3F)
  • thumb size (width/height 34px)
  • idle demo interval (1400+random*700)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • visibilitychange stopLoop/startLoop
  • prefers-reduced-motion static-frame guard
  • setPointerCapture for reliable drag tracking
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • Auto-demo loop runs by default — clear demoTO and set demoOn=false before production use
  • Spring physics runs every rAF frame even when idle; pos/vel settle but loop never fully exits

slidersnapspringmomentumdragui-controldetents

More Drag & Reorder components

  • FLIP Reorder7-row list reorders via FLIP spring physics on drag or arrow-key input; lifted card gains glow outline while others spring to new slots. Auto-demos when idle.
  • Kanban MoveThree-column kanban board where a cyan card lifts and spring-animates between lanes via FLIP. Auto-demos on a timer; supports arrow keys and horizontal drag.
  • Pull to RefreshA 5-row canvas list springs down on drag, revealing diagonal bars and a rotating geometric indicator; releasing past threshold triggers a 1.5s sync spinner.
  • Sortable Grid3x3 grid of colored numbered tiles that spring-animate into position as tiles are dragged or swapped; auto-shuffles on idle as a demo.
  • Dual RangeCanvas dual-range slider with two spring-driven thumbs (white lo, amber hi), hatched fill, delta readout, and tick marks. Auto-breathes when idle.
  • Carousel ThrowSeven colored cards orbit a glowing hub in a radial ring; drag to fling with angular inertia, release to snap to the nearest card under the marker.