replay(dataArray, speed = 1.0) let index = 0; const interval = setInterval(() => if (index >= dataArray.length) clearInterval(interval); VDash.emit('data:update', dataArray[index++].data); , 1000 / 60 / speed);
const PerfMonitor = frames: 0, lastTime: performance.now(), tick() this.frames++; const now = performance.now(); if (now - this.lastTime >= 1000) console.log( FPS: $this.frames ); this.frames = 0; this.lastTime = now; VDash Making A New Dash -P3-
const EventBus = { events: {}, on(event, callback) ... , emit(event, data) ... , off(event, callback) ... }; 2.1 Canvas vs DOM | Feature | Canvas | DOM | |---------|--------|-----| | Complex graphics | ✅ Excellent | ❌ Slow | | Text rendering | ⚠️ Manual | ✅ Easy | | Dynamic elements | ❌ Redraw all | ✅ Selective | | Performance | ✅ GPU accelerated | ⚠️ Layout thrashing | replay(dataArray, speed = 1
function renderIfDirty() if (dirtyFlags.speed) updateSpeedDisplay(); if (dirtyFlags.rpm) updateRPMNeedle(); // Reset flags after render if (dirtyFlags.rpm) updateRPMNeedle()
const utterance = new SpeechSynthesisUtterance(message); utterance.rate = 1.2; utterance.pitch = 1.0; synth.speak(utterance);