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<div id="clock"></div>
body { background: #2b55dd; } #clock { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: calc(100vw - 4px); height: auto; max-width: 300px; }
function initClock(elt, opt_properties) { const defaultProperties = { color: "#0ff", date: new Date(), glow: true, militaryTime: false, showMs: true }; const c = Object.assign(defaultProperties, opt_properties); !c.dotColor ? (c.dotColor = defaultProperties.color) : false; const getSecondsPassed = (now = c.date, militaryTime = c.militaryTime) => { const s10 = Math.floor(now.getSeconds()); const m10 = Math.floor(now.getMinutes() * 60 + s10); const h = Math.floor(now.getHours() * 3600 + m10); return { hour: h, minute10: m10, minute1: Math.floor((now.getMinutes() % 10) * 60 + s10), second10: s10, second1: Math.floor(now.getSeconds() % 10) }; }; let td = getSecondsPassed(); let vxEnd = c.showMs ? 175 : 130; let showGlow = c.glow ? `<use href="#fullClock" filter="url(#glow)"/>` : ""; let showGlowBlur = c.glow ? `<filter id="glow" x="-200%" y="-200%" width="1000%" height="1000%"><feGaussianBlur in="SourceGraphic" stdDeviation="1.4" /></filter>` : ""; let hrDur = c.militaryTime ? "86400" : "43200"; let hr1Offsets = c.militaryTime ? `0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30; 0 -60; 0 -90` : `0 -60; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30`; let hr10Offsets = c.militaryTime ? `0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -60; 0 -60; 0 -60; 0 -60` : `0 -30; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 -30; 0 -30`; let msDots = c.showMs ? `M 132.5 10 v0 m0 10 v0` : ""; let milliseconds = c.showMs ? `<g class="ms10"><use href="#nums" transform="translate(135)" /><animateTransform id="ms10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="1s" begin="0s" repeatCount="indefinite" calcMode="discrete" /></g><g class="ms"><use href="#nums" transform="translate(155)" /><animateTransform id="ms" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur=".1s" begin="0s" repeatCount="indefinite" calcMode="discrete" /></g>` : ""; let svg = `<svg id="clockItToMe" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${vxEnd} 30"><defs>${showGlowBlur}<marker id="v" viewBox="0 0 10 10" refX="5" refY="2" markerWidth="8" markerHeight="8" orient="auto"><path d="M 0 2 l 2 -2 h 6 l 2 2 l -2 2 l -6 0 z" fill="${c.color}" /></marker><marker id="h" viewBox="0 0 10 10" refX="5" refY="8" markerWidth="8" markerHeight="8" orient="rotate(90deg)"><path d="M 0 2 l 2 -2 h 6 l 2 2 l -2 2 l -6 0 z" fill="${c.color}" /></marker><g id="nums" stroke="none" fill="none"><path d="M5 0v 10 10 60 50 30 30 10 50 10 20 30" marker-mid="url(#v)" /><path d="M10 0v10 20 40 10 10 10 10 10 20 20 10 10 10 10 10 10 30 10 10 10 10 10 10" marker-mid="url(#h)" /><path d="M15 0v10 10 20 10 20 30 10 20 10 30 30 20 10 20 10 20 10 20" marker-mid="url(#v)" /></g></defs><g id="fullClock"><g class="hr10"><use href="#nums" /><animateTransform id="hr10" attributeName="transform" type="translate" values="${hr10Offsets}" dur="${hrDur}s" begin="-${td.hour}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="hr"><use href="#nums" transform="translate(20)" /><animateTransform id="hr" attributeName="transform" type="translate" values="${hr1Offsets}" dur="${hrDur}s" begin="-${td.hour}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="min10"><use href="#nums" transform="translate(45)" /><animateTransform id="min10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150" dur="3600s" begin="-${td.minute10}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="min"><use href="#nums" transform="translate(65)" /><animateTransform id="min" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="600s" begin="-${td.minute1}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="sec10"><use href="#nums" transform="translate(90)" /><animateTransform id="sec10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150" dur="60s" begin="-${td.second10}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="sec"><use href="#nums" transform="translate(110)" /><animateTransform id="sec" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="10s" begin="-${td.second1}s" repeatCount="indefinite" calcMode="discrete" /></g>${milliseconds}<path d="M42.5 10 v0 m0 10 v0 M 87.5 10 v0 m0 10 v0${msDots}" stroke="${c.dotColor}" stroke-width="3" stroke-linecap="square" /></g>${showGlow}</svg>`; const wrapper = document.createElement("div"); wrapper.innerHTML = svg; const doc = wrapper.firstChild; elt.appendChild(doc); } initClock(document.querySelector("#clock"), { color: "#D5FF77", dotColor: "#80AACC", showMs: true }); // refresh it if we leave the page document.addEventListener("visibilitychange", () => { if (!document.hidden) { clock.innerHTML = ""; initClock(document.querySelector("#clock"), { color: "#D5FF77", dotColor: "#80AACC", showMs: true }); } });
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HTML
CSS
JS
<div id="clock"></div>
body { background: #2b55dd; } #clock { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: calc(100vw - 4px); height: auto; max-width: 300px; }
function initClock(elt, opt_properties) { const defaultProperties = { color: "#0ff", date: new Date(), glow: true, militaryTime: false, showMs: true }; const c = Object.assign(defaultProperties, opt_properties); !c.dotColor ? (c.dotColor = defaultProperties.color) : false; const getSecondsPassed = (now = c.date, militaryTime = c.militaryTime) => { const s10 = Math.floor(now.getSeconds()); const m10 = Math.floor(now.getMinutes() * 60 + s10); const h = Math.floor(now.getHours() * 3600 + m10); return { hour: h, minute10: m10, minute1: Math.floor((now.getMinutes() % 10) * 60 + s10), second10: s10, second1: Math.floor(now.getSeconds() % 10) }; }; let td = getSecondsPassed(); let vxEnd = c.showMs ? 175 : 130; let showGlow = c.glow ? `<use href="#fullClock" filter="url(#glow)"/>` : ""; let showGlowBlur = c.glow ? `<filter id="glow" x="-200%" y="-200%" width="1000%" height="1000%"><feGaussianBlur in="SourceGraphic" stdDeviation="1.4" /></filter>` : ""; let hrDur = c.militaryTime ? "86400" : "43200"; let hr1Offsets = c.militaryTime ? `0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30; 0 -60; 0 -90` : `0 -60; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270; 0 0; 0 -30`; let hr10Offsets = c.militaryTime ? `0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -30; 0 -60; 0 -60; 0 -60; 0 -60` : `0 -30; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 0; 0 -30; 0 -30`; let msDots = c.showMs ? `M 132.5 10 v0 m0 10 v0` : ""; let milliseconds = c.showMs ? `<g class="ms10"><use href="#nums" transform="translate(135)" /><animateTransform id="ms10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="1s" begin="0s" repeatCount="indefinite" calcMode="discrete" /></g><g class="ms"><use href="#nums" transform="translate(155)" /><animateTransform id="ms" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur=".1s" begin="0s" repeatCount="indefinite" calcMode="discrete" /></g>` : ""; let svg = `<svg id="clockItToMe" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${vxEnd} 30"><defs>${showGlowBlur}<marker id="v" viewBox="0 0 10 10" refX="5" refY="2" markerWidth="8" markerHeight="8" orient="auto"><path d="M 0 2 l 2 -2 h 6 l 2 2 l -2 2 l -6 0 z" fill="${c.color}" /></marker><marker id="h" viewBox="0 0 10 10" refX="5" refY="8" markerWidth="8" markerHeight="8" orient="rotate(90deg)"><path d="M 0 2 l 2 -2 h 6 l 2 2 l -2 2 l -6 0 z" fill="${c.color}" /></marker><g id="nums" stroke="none" fill="none"><path d="M5 0v 10 10 60 50 30 30 10 50 10 20 30" marker-mid="url(#v)" /><path d="M10 0v10 20 40 10 10 10 10 10 20 20 10 10 10 10 10 10 30 10 10 10 10 10 10" marker-mid="url(#h)" /><path d="M15 0v10 10 20 10 20 30 10 20 10 30 30 20 10 20 10 20 10 20" marker-mid="url(#v)" /></g></defs><g id="fullClock"><g class="hr10"><use href="#nums" /><animateTransform id="hr10" attributeName="transform" type="translate" values="${hr10Offsets}" dur="${hrDur}s" begin="-${td.hour}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="hr"><use href="#nums" transform="translate(20)" /><animateTransform id="hr" attributeName="transform" type="translate" values="${hr1Offsets}" dur="${hrDur}s" begin="-${td.hour}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="min10"><use href="#nums" transform="translate(45)" /><animateTransform id="min10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150" dur="3600s" begin="-${td.minute10}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="min"><use href="#nums" transform="translate(65)" /><animateTransform id="min" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="600s" begin="-${td.minute1}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="sec10"><use href="#nums" transform="translate(90)" /><animateTransform id="sec10" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150" dur="60s" begin="-${td.second10}s" repeatCount="indefinite" calcMode="discrete" /></g><g class="sec"><use href="#nums" transform="translate(110)" /><animateTransform id="sec" attributeName="transform" type="translate" values="0 0; 0 -30; 0 -60; 0 -90; 0 -120; 0 -150; 0 -180; 0 -210; 0 -240; 0 -270" dur="10s" begin="-${td.second1}s" repeatCount="indefinite" calcMode="discrete" /></g>${milliseconds}<path d="M42.5 10 v0 m0 10 v0 M 87.5 10 v0 m0 10 v0${msDots}" stroke="${c.dotColor}" stroke-width="3" stroke-linecap="square" /></g>${showGlow}</svg>`; const wrapper = document.createElement("div"); wrapper.innerHTML = svg; const doc = wrapper.firstChild; elt.appendChild(doc); } initClock(document.querySelector("#clock"), { color: "#D5FF77", dotColor: "#80AACC", showMs: true }); // refresh it if we leave the page document.addEventListener("visibilitychange", () => { if (!document.hidden) { clock.innerHTML = ""; initClock(document.querySelector("#clock"), { color: "#D5FF77", dotColor: "#80AACC", showMs: true }); } });