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pszemraj/clock.html

Last active September 12, 2025 04:37
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simple html clock
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clock.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Clock AI</title>
<style>
:root {
--bg: #0a0b0d;
--panel: #141518;
--text: #ffffff;
--muted: #666;
--accent: #0ea5e9;
--scale: 1.8;
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
height: 100vh;
background: var(--bg);
color: var(--text);
font-family: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', monospace;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
user-select: none;
overflow: hidden;
}
/* BIG TIME - THE WHOLE POINT */
.time {
font-variant-numeric: tabular-nums;
font-weight: 700;
font-size: calc(min(22vw, 200px) * var(--scale));
letter-spacing: -0.02em;
line-height: 1;
display: flex;
align-items: center;
margin: 20px 0;
}
.time span {
display: inline-block;
}
.colon {
width: 0.15em;
height: 0.15em;
background: currentColor;
border-radius: 50%;
margin: 0 0.2em;
opacity: 0.4;
align-self: center;
}
.seconds {
font-size: 0.35em;
opacity: 0.5;
margin-left: 0.1em;
font-weight: 500;
}
.date {
font-size: calc(14px * var(--scale));
text-transform: uppercase;
letter-spacing: 0.3em;
opacity: 0.5;
margin-bottom: 10px;
}
.tz {
font-size: calc(12px * var(--scale));
opacity: 0.3;
letter-spacing: 0.2em;
margin-top: 10px;
}
/* Controls - keep them simple */
.controls {
position: fixed;
top: 20px;
left: 50%;
transform: translateX(-50%);
display: flex;
gap: 15px;
align-items: center;
opacity: 0.2;
transition: opacity 0.2s;
}
body:hover .controls {
opacity: 0.9;
}
.controls select,
.controls button {
background: var(--panel);
border: 1px solid rgba(255,255,255,0.1);
color: var(--text);
padding: 6px 12px;
border-radius: 6px;
font-size: 11px;
cursor: pointer;
font-family: inherit;
}
.controls button.toggle {
width: 48px;
height: 24px;
padding: 2px;
position: relative;
}
.controls button.toggle::after {
content: '';
position: absolute;
width: 18px;
height: 18px;
background: var(--text);
border-radius: 50%;
top: 2px;
left: 2px;
transition: transform 0.2s;
}
.controls button.toggle[data-on="true"]::after {
transform: translateX(24px);
}
.controls button.toggle[data-on="true"] {
background: rgba(14, 165, 233, 0.3);
}
/* Scale slider */
input[type="range"] {
width: 200px;
height: 24px;
background: var(--panel);
border: 1px solid rgba(255,255,255,0.1);
border-radius: 12px;
outline: none;
-webkit-appearance: none;
cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
-webkit-appearance: none;
width: 18px;
height: 18px;
background: var(--text);
border-radius: 50%;
cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
height: 100%;
border-radius: 12px;
}
.scale-label {
font-size: 10px;
opacity: 0.5;
margin-left: -10px;
}
/* Extra zones - optional */
.zones {
position: fixed;
bottom: 20px;
left: 50%;
transform: translateX(-50%);
display: flex;
gap: 40px;
font-size: calc(11px * var(--scale));
opacity: 0.3;
font-variant-numeric: tabular-nums;
}
.zone {
display: flex;
gap: 8px;
align-items: baseline;
}
.zone-name {
opacity: 0.5;
text-transform: uppercase;
letter-spacing: 0.1em;
}
.zone-time {
font-weight: 600;
}
</style>
</head>
<body>
<div class="controls">
<select id="tzSel">
<option value="auto">Auto</option>
<option value="America/New_York">New York</option>
<option value="America/Chicago">Chicago</option>
<option value="America/Denver">Denver</option>
<option value="America/Los_Angeles">Los Angeles</option>
<option value="Europe/London">London</option>
<option value="Europe/Paris">Paris</option>
<option value="Europe/Berlin">Berlin</option>
<option value="Asia/Tokyo">Tokyo</option>
<option value="Asia/Shanghai">Shanghai</option>
<option value="Australia/Sydney">Sydney</option>
<option value="UTC">UTC</option>
</select>
<button id="secToggle" class="toggle" data-on="false"></button>
<input id="scaleSlider" type="range" min="0.5" max="3.0" step="0.05" value="1.8">
<span class="scale-label" id="scaleLabel">1.8x</span>
</div>
<div class="date" id="date">LOADING...</div>
<div class="time">
<span id="h">00</span>
<span class="colon"></span>
<span id="m">00</span>
<span class="seconds" id="s" style="display:none"></span>
</div>
<div class="tz" id="tz">EDT</div>
<div class="zones" id="zones" style="display:none">
<!-- Will be populated by JS -->
</div>
<script>
// State from localStorage
let showSec = JSON.parse(localStorage.getItem("clock.showSec") ?? "false");
let zonePref = localStorage.getItem("clock.tz") ?? "auto";
let scale = parseFloat(localStorage.getItem("clock.scale") ?? "1.8");
let showZones = JSON.parse(localStorage.getItem("clock.showZones") ?? "false");
// Elements
const el = {
h: document.getElementById("h"),
m: document.getElementById("m"),
s: document.getElementById("s"),
date: document.getElementById("date"),
tz: document.getElementById("tz"),
tzSel: document.getElementById("tzSel"),
secToggle: document.getElementById("secToggle"),
scaleSlider: document.getElementById("scaleSlider"),
scaleLabel: document.getElementById("scaleLabel"),
zones: document.getElementById("zones")
};
// Additional zones to show
const extraZones = [
{ name: 'NYC', tz: 'America/New_York' },
{ name: 'UTC', tz: 'UTC' },
{ name: 'LON', tz: 'Europe/London' },
{ name: 'TOK', tz: 'Asia/Tokyo' }
];
// Initialize UI
el.tzSel.value = zonePref;
el.secToggle.dataset.on = String(showSec);
el.s.style.display = showSec ? 'inline-block' : 'none';
el.scaleSlider.value = scale;
el.scaleLabel.textContent = scale.toFixed(1) + 'x';
document.documentElement.style.setProperty('--scale', String(scale));
el.zones.style.display = showZones ? 'flex' : 'none';
// Seconds toggle
el.secToggle.addEventListener("click", () => {
showSec = !showSec;
el.secToggle.dataset.on = String(showSec);
el.s.style.display = showSec ? 'inline-block' : 'none';
localStorage.setItem("clock.showSec", JSON.stringify(showSec));
if (!showSec) el.s.textContent = '';
});
// Timezone change
el.tzSel.addEventListener("change", e => {
zonePref = e.target.value;
localStorage.setItem("clock.tz", zonePref);
});
// Scale slider
el.scaleSlider.addEventListener("input", e => {
scale = parseFloat(e.target.value);
document.documentElement.style.setProperty('--scale', String(scale));
el.scaleLabel.textContent = scale.toFixed(1) + 'x';
});
el.scaleSlider.addEventListener("change", () => {
localStorage.setItem("clock.scale", String(scale));
});
// Get current timezone
function getCurrentTz() {
return zonePref === "auto"
? Intl.DateTimeFormat().resolvedOptions().timeZone
: zonePref;
}
// Update function - only update what changed
let lastMin = -1;
function update() {
const now = new Date();
const tz = getCurrentTz();
// Time formatting
const timeParts = new Intl.DateTimeFormat('en-US', {
timeZone: tz,
hour12: false,
hour: '2-digit',
minute: '2-digit',
second: '2-digit'
}).formatToParts(now);
const time = Object.fromEntries(timeParts.map(p => [p.type, p.value]));
// Always update time
el.h.textContent = time.hour;
el.m.textContent = time.minute;
if (showSec) {
el.s.textContent = ':' + time.second;
}
// Update other elements only once per minute
if (parseInt(time.minute) !== lastMin) {
lastMin = parseInt(time.minute);
// Date
const dateStr = new Intl.DateTimeFormat('en-US', {
timeZone: tz,
weekday: 'long',
year: 'numeric',
month: 'long',
day: 'numeric'
}).format(now);
el.date.textContent = dateStr.toUpperCase();
// Timezone
const tzName = new Intl.DateTimeFormat('en-US', {
timeZone: tz,
timeZoneName: 'short'
}).format(now).split(' ').pop();
el.tz.textContent = tzName;
// Update extra zones if visible
if (showZones) {
updateZones(now);
}
}
}
function updateZones(now) {
el.zones.innerHTML = extraZones.map(zone => {
const time = new Intl.DateTimeFormat('en-US', {
timeZone: zone.tz,
hour: '2-digit',
minute: '2-digit',
hour12: false
}).format(now);
return `<div class="zone">
<span class="zone-name">${zone.name}</span>
<span class="zone-time">${time}</span>
</div>`;
}).join('');
}
// Keyboard shortcuts
document.addEventListener('keydown', e => {
switch(e.key.toLowerCase()) {
case 's':
el.secToggle.click();
break;
case 'z':
showZones = !showZones;
el.zones.style.display = showZones ? 'flex' : 'none';
localStorage.setItem("clock.showZones", JSON.stringify(showZones));
if (showZones) updateZones(new Date());
break;
case 'f':
if (!document.fullscreenElement) {
document.documentElement.requestFullscreen();
} else {
document.exitFullscreen();
}
break;
case '+':
case '=':
if (scale < 3.0) {
scale = Math.min(3.0, scale + 0.1);
el.scaleSlider.value = scale;
el.scaleSlider.dispatchEvent(new Event('input'));
el.scaleSlider.dispatchEvent(new Event('change'));
}
break;
case '-':
case '_':
if (scale > 0.5) {
scale = Math.max(0.5, scale - 0.1);
el.scaleSlider.value = scale;
el.scaleSlider.dispatchEvent(new Event('input'));
el.scaleSlider.dispatchEvent(new Event('change'));
}
break;
}
});
// Run update
update();
setInterval(update, showSec ? 100 : 500);
// Prevent context menu
document.addEventListener('contextmenu', e => e.preventDefault());
</script>
</body>
</html>
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