∞ forever components

Drag & Reorder

Dual Range

Canvas dual-range slider with two spring-driven thumbs (white lo, amber hi), hatched fill, delta readout, and tick marks. Auto-breathes when idle.

canvasmedium complexitysubtle motionpointer

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Live demo — the real component, running in a sandbox. One self-contained HTML file, zero dependencies. Open it on the canvas →
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When to use it

Price range filters, date-span pickers, audio EQ bands, any UI needing a two-bound numeric input with tactile spring feel.

When not to

Contexts requiring native form submission — values live only in JS. Not suitable where accessibility auditors require a true input[type=range].

Working with an AI agent

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

Change accent color from cyan to purple by setting --dr07-acc to #a855f7 and updating ctx.strokeStyle on the filled segment to match. 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

  • accent color (--dr07-acc / ctx.strokeStyle #22d3ee)
  • initial lo/hi values (lo.v=32, hi.v=68)
  • spring stiffness (k=0.18) and damping (damp=0.74)
  • idle timeout before demo resumes (IDLE=2600)
  • hatch step density (step=12)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • setPointerCapture for drag continuity
  • IIFE wrapper
  • reduced-motion static-frame branch
  • visibilitychange pause/resume
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • Values not exposed as a real form input — wire lo.v/hi.v to hidden inputs for form use
  • Spring physics means displayed value lags target during fast drags
  • Auto-demo resumes 2.6 s after last interaction — remove demo() call if shipping as a real control

range-sliderdual-thumbspringcanvasui-controldraggablemonospace

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