Online Stopwatch Tool

ProChrono | Online Stopwatch :root { --primary: #00FFFF; --background: #0a0e17; --card: rgba(16, 23, 35, 0.8); } body { background: radial-gradient(circle at 50% 0%, #1a2233, var(--background)); font-family: 'Inter', sans-serif; color: #f8fafc; } .font-mono { font-family: 'JetBrains Mono', monospace; } .glass-panel { background: var(--card); backdrop-filter: blur(12px); border: 1px solid rgba(255, 255, 255, 0.1); box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); } .text-glow { text-shadow: 0 0 15px rgba(0, 255, 255, 0.5); } .btn-primary { background: var(--primary); color: #0a0e17; box-shadow: 0 0 20px rgba(0, 255, 255, 0.3); } .btn-primary:hover { background: #00e6e6; } .btn-outline { background: transparent; border: 1px solid rgba(255, 255, 255, 0.1); color: #94a3b8; } .btn-outline:hover { background: rgba(255, 255, 255, 0.05); color: #fff; } ProChrono 00 : 00 .00 Standby Reset Start Lap Lap Split Total Precision Timing Instrument v1.0 let startTime, elapsedTime = 0, timerInterval; let isRunning = false; let laps = []; function formatTime(ms) { const minutes = Math.floor(ms / 60000); const seconds = Math.floor((ms % 60000) / 1000); const milliseconds = Math.floor((ms % 1000) / 10); return { min: minutes.toString().padStart(2, '0'), sec: seconds.toString().padStart(2, '0'), ms: milliseconds.toString().padStart(2, '0') }; } function updateDisplay() { const t = formatTime(elapsedTime); document.getElementById('display-min').innerText = t.min; document.getElementById('display-sec').innerText = t.sec; document.getElementById('display-ms').innerText = '.' + t.ms; } function toggleTimer() { isRunning = !isRunning; const btn = document.getElementById('start-stop-btn'); const btnText = document.getElementById('btn-text'); const dot = document.getElementById('status-dot'); const statusText = document.getElementById('status-text'); const lapBtn = document.getElementById('lap-btn'); if (isRunning) { startTime = Date.now() - elapsedTime; timerInterval = setInterval(() => { elapsedTime = Date.now() - startTime; updateDisplay(); }, 10); btn.classList.replace('btn-primary', 'bg-red-600'); btn.classList.add('text-white'); btnText.innerText = 'Stop'; document.getElementById('play-icon').outerHTML = ``; dot.classList.replace('bg-slate-600', 'bg-[#00FFFF]'); dot.style.boxShadow = '0 0 10px #00FFFF'; statusText.innerText = 'Running'; lapBtn.classList.remove('opacity-50', 'cursor-not-allowed'); } else { clearInterval(timerInterval); btn.classList.replace('bg-red-600', 'btn-primary'); btn.classList.remove('text-white'); btnText.innerText = 'Start'; document.getElementById('play-icon').outerHTML = ``; dot.classList.replace('bg-[#00FFFF]', 'bg-slate-600'); dot.style.boxShadow = 'none'; statusText.innerText = 'Standby'; } } function resetTimer() { clearInterval(timerInterval); isRunning = false; elapsedTime = 0; laps = []; updateDisplay(); document.getElementById('laps-list').innerHTML = ''; // Reset UI states const btn = document.getElementById('start-stop-btn'); btn.classList.remove('bg-red-600', 'text-white'); btn.classList.add('btn-primary'); document.getElementById('btn-text').innerText = 'Start'; document.getElementById('status-dot').classList.replace('bg-[#00FFFF]', 'bg-slate-600'); document.getElementById('status-text').innerText = 'Standby'; document.getElementById('lap-btn').classList.add('opacity-50', 'cursor-not-allowed'); } function addLap() { if (!isRunning && elapsedTime === 0) return; const lastSplit = laps.length > 0 ? laps[0] : 0; const splitTime = elapsedTime - lastSplit; laps.unshift(elapsedTime); const tTotal = formatTime(elapsedTime); const tSplit = formatTime(splitTime); const lapRow = document.createElement('div'); lapRow.className = 'px-6 py-3 flex justify-between items-center text-sm font-mono border-b border-white/5 hover:bg-white/5 transition-colors'; lapRow.innerHTML = ` #${laps.length.toString().padStart(2, '0')} +${tSplit.min}:${tSplit.sec}.${tSplit.ms} ${tTotal.min}:${tTotal.sec}.${tTotal.ms} `; const list = document.getElementById('laps-list'); list.insertBefore(lapRow, list.firstChild); }

Online Stopwatch Tool

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