Clyune Component GalleryCopied! · How it works & code
Click the copy button in the top-right corner of the code block. The code will be highlighted once (indicating selection), the button icon changes from 'two pages' to 'checkmark', and a toast appears at the bottom...
Runtime logic
Visiting `/micro/copy`, DemoHost lazy-loads `demos/kits/kit-micro.js` (registry `mod: 'kit-micro'`) and calls `mount(host, { variant: 'copy' })`. mount resolves the variant to family `copy`; `withControls` builds the control panel (6 presets + sliders). `createCanvasStage` creates the `<canvas>` (HiDPI ≤ 2×, ResizeObserver) and the info panel. The family’s `build(S)` initialises state and returns the per-frame callback. Every `requestAnimationFrame`: read controls, advance a speed-scaled clock (dt ≤ 50 ms), run the frame callback; returned readouts go to the info panel. Pointer down/drag/move updates the interaction (drag handles, hover readouts); when untouched and auto-demo is on, the pointer follows a Lissajous path. Changing parameters: colour/speed/size apply live; structural ones remount; leaving the page cancels rAF, removes listeners and frees resources.
Environment
Canvas 2D: 2D canvas drawing; requestAnimationFrame: Display-synced animation loop; ResizeObserver: Canvas follows container size; Pointer Events: Unified mouse/touch/pen events; devicePixelRatio: Crisp HiDPI rendering (capped at 2×) · react 18.3.1, react-router-dom 6.30.6, vite 5.4.21
Dependencies
react 18.3.1
Imported APIs
withControls — Wraps the demo in the shared control panel (presets, sliders, reset); hot-updates or remounts on change; paramsFromSpec — Turns the spec (colour/speed/size/count/extras) into control-panel parameter definitions; createCanvasStage — Shared Canvas 2D stage: canvas + info panel, HiDPI, one rAF loop, pointer state, idle auto-pointer; hueOf — Hue of a colour (0–360°); clamp — Clamps a value to a range; TAU — Constant 2π; fmt — Number formatting (fixed decimals); F — Formula block HTML; S.onDown — Pointer down; S.onUp — Pointer up; S.clear — Clears with the background colour (translucent = trails); S.isAutoDemo — Whether auto demo is on; S.onFrame — Registers a per-frame callback; its return value feeds the info panel; ctx.fill() — Fills the current path; ctx.stroke() — Strokes the current path; ctx.fillRect() — Fills a rectangle; ctx.fillText() — Draws filled text; ctx.strokeRect() — Strokes a rectangle; ctx.beginPath() — Starts a new path; ctx.moveTo() — Moves the pen without drawing; ctx.arcTo() — Adds an arc using tangent lines; ctx.closePath() — Closes the current sub-path; ctx.arc() — Adds a circular arc (center, radius, start/end angle); ctx.save() — Saves the drawing state (transform, styles, clip)
Source code
frontend/src/demos/kits/kit-micro.js: FAM.copy (L286-L302)
Code walkthrough
L286-302: Calls the factory `mFam()` to produce the full definition (spec + doc + build) from the options below. L286-286: Title shown in the info and control panels: “Copied!”. L286-286: Range/default of the count slider. L286-286: Extra demo-specific slider/toggle: Toast duration. L286-286: Range/default of the size slider. L286-286: Default main colour. L286-286: Animation period (s). L287-287: Help text of the count parameter. L287-287: Help text of the extra parameter. L287-287: Help text of the size parameter. L288-288: Preset buttons: name → parameter overrides (5). L289-289: Body of the “Notes” section. L290-290: Main formula of the “Formula” section. L290-290: Second formula line. L291-302: Per-frame draw function: draws with Canvas 2D `fill`, `stroke`, `fillRect`, `fillText`, `strokeRect`; math via `Math.min`, `Math.floor`; returns readouts `mode`, `cell` to the info panel.
Principles
Tip Transparency = Entry (0.25 seconds) · (1 - exit (0.3 seconds after stay) Actual code: navigator.cripboard.writeText (text) Copy success: Click on a copy button at the top right corner of the code block, the code will be highlighted once (means selected), the button icon will change from " two sheets of paper " to " check " , the bottom will eject a hint " copied to the clipboard" and will fade out after a while, and the button will revert to the same. There's no real use here DOM 控件：每个微交互都在画布上逐帧画出来。动画按固定周期自动循环播放，并用一个「演示指针」模拟用户的点击、按住或拖动；你在画布上点一下，动画就会从头重新播放一遍。右侧滑条改动后立刻生效，下方信息面板实时显示当前状态。