Created
December 5, 2025 18:38
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| function boing(times = 1, pause = 1000) { | |
| const canvas = document.getElementById('canvas'); | |
| if (!canvas) { console.error('No canvas!'); return; } | |
| const rect = canvas.getBoundingClientRect(); | |
| const cx = rect.width / 2; | |
| const cy = rect.height / 2; | |
| function fire(type, x, y) { | |
| const common = { | |
| bubbles: true, cancelable: true, view: window, | |
| clientX: rect.left + x, clientY: rect.top + y, | |
| offsetX: x, offsetY: y, | |
| button: 0, buttons: type.includes('up') ? 0 : 1 | |
| }; | |
| canvas.dispatchEvent(new PointerEvent('pointer' + type, { ...common, pointerId: 1, pointerType: 'mouse', isPrimary: true })); | |
| canvas.dispatchEvent(new MouseEvent('mouse' + type, common)); | |
| } | |
| function doPull(callback) { | |
| const endX = cx + rect.width * 0.35; | |
| const randomY = (Math.random() - 0.5) * rect.height * 0.6; | |
| const endY = cy + randomY; | |
| fire('down', cx, cy); | |
| let x = cx, y = cy, step = 0; | |
| const dx = (endX - cx) / 12; | |
| const dy = (endY - cy) / 12; | |
| const id = setInterval(() => { | |
| x += dx; y += dy; step++; | |
| fire('move', x, y); | |
| if (step >= 12) { | |
| clearInterval(id); | |
| setTimeout(() => { | |
| fire('up', endX, endY); | |
| if (callback) callback(); | |
| }, 30); | |
| } | |
| }, 20); | |
| } | |
| let count = 0; | |
| function next() { | |
| if (count >= times) return; | |
| count++; | |
| console.log(`Boing ${count}/${times}`); | |
| doPull(() => { | |
| if (count < times) { | |
| setTimeout(next, pause); | |
| } | |
| }); | |
| } | |
| next(); | |
| } | |
| // Usage examples: | |
| // boing() - pull once | |
| // boing(5) - pull 5 times with 1 second pause | |
| // boing(10, 500) - pull 10 times with 500ms pause | |
| // boing(3, 2000) - pull 3 times with 2 second pause |
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