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Resizable

Two panels split by a draggable handle with ratio animation.

Panel one
Panel two
Customize

Installation

$ pnpm dlx shadcn@latest add @framecn/resizable

Usage

import { Resizable } from "@/components/ui/resizable";
<Resizable ratio={0.5} direction="horizontal" />

Smooth transitions

The docs preview drags the split handle with a cursor while animating ratio and handle state via useResizableTransition:

import { H, W } from "@/lib/customizer-config";
import { Cursor } from "@/components/framecn/cursor";
import { useCursorPath } from "@/components/framecn/use-cursor-path";
import { Resizable } from "@/components/framecn/resizable";
import { useResizableTransition } from "@/components/framecn/use-resizable-transition";
 
const PANEL_WIDTH = 440;
const handleX = (ratio: number) =>
  W / 2 - PANEL_WIDTH / 2 + PANEL_WIDTH * ratio;
const HANDLE_Y = H / 2;
 
const cursorStyle = useCursorPath([
  { at: 0, x: 80, y: 60 },
  { at: 32, x: handleX(0.5), y: HANDLE_Y, duration: 28 },
  { at: 44, x: handleX(0.5), y: HANDLE_Y, press: true, duration: 0 },
  { at: 84, x: handleX(0.75), y: HANDLE_Y, press: true, duration: 40 },
  { at: 132, x: handleX(0.25), y: HANDLE_Y, press: true, duration: 48 },
  { at: 176, x: handleX(0.5), y: HANDLE_Y, press: true, duration: 44 },
  { at: 184, x: handleX(0.5), y: HANDLE_Y, duration: 0 },
]);
 
const resizableStyle = useResizableTransition([
  { at: 0, ratio: 0.5, handleState: "idle" },
  { at: 32, handleState: "hover", duration: 8 },
  { at: 46, handleState: "press", duration: 4 },
  { at: 44, ratio: 0.5 },
  { at: 84, ratio: 0.75, duration: 40, easing: "inOut" },
  { at: 132, ratio: 0.25, duration: 48, easing: "inOut" },
  { at: 176, ratio: 0.5, duration: 44, easing: "inOut" },
  { at: 184, handleState: "idle", duration: 8 },
]);
 
<div style={{ position: "relative", width: "100%", height: "100%" }}>
  <Resizable style={resizableStyle} direction="horizontal" />
  <Cursor style={cursorStyle} variant="pointer" />
</div>;

style takes precedence over ratio and handleState when provided. Keep cursor press: true waypoints in sync with ratio drag steps.

API Reference

Resizable

PropTypeDefault
rationumber0.5
handleState"idle" | "hover" | "press""idle"
styleResizableStyle- (takes precedence over ratio / handleState)
direction"horizontal" | "vertical""horizontal"
firstReact.ReactNode-
secondReact.ReactNode-
minRationumber0.15
maxRationumber0.85
widthnumber-
heightnumber-
themePartial<FramecnTheme>-
classNamestring-