Simple Animation

<main class="study"><p class="study-label">공식 API 기반 · 독립 예제</p><header><h2>출발과 도착을 정하는 세 방법</h2><p>기본 위치는 80px입니다. 입력한 시작은 0px, 입력한 도착은 160px입니다.</p></header><div class="stage method-stage"><div class="method-row"><strong>to</strong><div class="method-track"><span class="axis-label" style="left:0">0</span><span class="axis-label" style="left:80px">80</span><span class="axis-label" style="left:160px">160</span><div class="method-mark" style="background:#95efd2;transform:translateX(80px)"></div></div></div><div class="method-row"><strong>from</strong><div class="method-track"><span class="axis-label" style="left:0">0</span><span class="axis-label" style="left:80px">80</span><span class="axis-label" style="left:160px">160</span><div class="method-mark" style="background:#fbadce;transform:translateX(80px)"></div></div></div><div class="method-row"><strong>fromTo</strong><div class="method-track"><span class="axis-label" style="left:0">0</span><span class="axis-label" style="left:80px">80</span><span class="axis-label" style="left:160px">160</span><div class="method-mark" style="background:#ffd28c;transform:translateX(80px)"></div></div></div></div><div class="controls"><button id="play" type="button">함께 재생</button><button id="rest" type="button">기본 위치로</button><label>진행<input id="progress" type="range" min="0" max="100" value="0" step="1"></label><label><input id="static-mode" type="checkbox">정적 보기</label></div><p class="readout" id="reading" aria-live="off"></p></main>

*{box-sizing:border-box}body{background:#111522;color:#f5f2eb;font-family:system-ui,sans-serif;margin:0}button{font:inherit}.study{margin:0 auto;max-width:1100px;min-height:100vh;padding:clamp(20px,4vw,42px)}.study-label{color:#95efd2;font-size:12px;letter-spacing:.08em;margin:0 0 24px}header h2{font-size:clamp(24px,4vw,40px);letter-spacing:-.04em;margin:0 0 12px}header p{color:#aeb7c9;line-height:1.6;margin:0 0 24px;max-width:62ch}.controls{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}button{background:#26314b;border:1px solid #617394;border-radius:9px;color:#f5f2eb;cursor:pointer;padding:9px 14px}button:hover{background:#334261}button:focus-visible{outline:3px solid #95efd2;outline-offset:3px}button:disabled{cursor:default;opacity:.45}.stage{align-items:center;background:radial-gradient(ellipse at top,#243253,#141c2d);border:1px solid #3d4c68;border-radius:20px;display:flex;justify-content:center;min-height:220px;overflow:hidden;position:relative}.note{color:#aeb7c9;font-size:13px;line-height:1.5}.readout{color:#95efd2;font-family:ui-monospace,monospace;font-size:13px;min-height:2em}.stage svg{display:block;max-width:100%}code{font-family:ui-monospace,monospace}button[aria-pressed="true"]{background:#95efd2;color:#111522}


.study{padding:18px;max-width:960px}.study-label{margin-bottom:10px}header h2{font-size:clamp(22px,4vw,32px);margin-bottom:8px}header p{font-size:14px;margin-bottom:16px}.controls{align-items:center;gap:9px;margin:14px 0}.controls label{align-items:center;color:#cbd4e3;display:flex;flex-wrap:wrap;font-size:13px;gap:7px}.controls input[type=range]{accent-color:#95efd2;max-width:145px}.controls select{background:#26314b;border:1px solid #617394;border-radius:7px;color:#f5f2eb;font:inherit;padding:6px}.stage{min-height:180px}.readout{line-height:1.5;margin:8px 0}.small-code{background:#172036;border:1px solid #354258;border-radius:10px;color:#c3d1e7;font-size:12px;line-height:1.5;max-height:180px;overflow:auto;padding:12px;white-space:pre-wrap;word-break:break-word}.pair{display:flex;gap:12px;justify-content:center}.pair figure{flex:1;margin:0;max-width:300px;min-width:0;padding:8px}.pair figcaption{color:#aeb7c9;font-family:ui-monospace,monospace;font-size:12px;margin-bottom:6px;text-align:center}.pair svg{display:block;max-height:210px;width:100%}.tile-art{align-items:center;border-radius:14px;color:#152039;display:flex;justify-content:center}.tile-art svg{height:65%;width:65%}.menu-stage{min-height:196px;padding:18px}.menu-panels{display:flex;gap:10px;max-width:570px;width:100%}.menu-panel{align-items:center;background:linear-gradient(135deg,#95efd2,#75d8ed);border-radius:14px;color:#142137;display:flex;flex:1;flex-direction:column;font-weight:650;gap:10px;justify-content:center;min-height:135px;min-width:0;padding:12px}.menu-panel:nth-child(2){background:linear-gradient(135deg,#fbadce,#897dff)}.menu-panel:nth-child(3){background:linear-gradient(135deg,#ffd28c,#fc7f8e)}.menu-panel svg{height:58px;width:58px}.icon-bars{display:inline-flex;flex-direction:column;gap:5px;margin-right:7px;vertical-align:middle}.icon-bars span{background:currentColor;display:block;height:2px;width:17px}.endpoint-note{color:#aeb7c9;font-size:12px;line-height:1.5}button[hidden],[hidden]{display:none!important}@media(max-width:380px){.study{padding:14px}.controls label{max-width:100%}.menu-panels{gap:6px}.menu-panel{font-size:12px;padding:7px}.pair{gap:0}}

.method-stage{align-items:stretch;flex-direction:column;gap:10px;padding:16px}.method-row{align-items:center;display:grid;gap:12px;grid-template-columns:50px 1fr;width:100%}.method-row strong{font-family:ui-monospace,monospace;font-size:12px}.method-track{border-top:1px dashed #617394;height:58px;min-width:184px;position:relative}.method-mark{border-radius:7px;height:24px;left:0;position:absolute;top:15px;width:24px}.axis-label{color:#aeb7c9;font-family:ui-monospace,monospace;font-size:10px;position:absolute;top:43px}

gsap.registerPlugin();

const q=selector=>document.querySelector(selector),qa=selector=>Array.from(document.querySelectorAll(selector));
const studyAbort=new AbortController(),studyCleanup=[];
const listen=(target,type,handler)=>target.addEventListener(type,handler,{signal:studyAbort.signal});
const preference=matchMedia('(prefers-reduced-motion: reduce)'),staticControl=q('#static-mode');
staticControl.checked=preference.matches;staticControl.disabled=preference.matches;
const isStatic=()=>staticControl.checked||preference.matches;
let applyMode=()=>{};
listen(staticControl,'change',()=>applyMode());
listen(preference,'change',()=>{staticControl.checked=preference.matches;staticControl.disabled=preference.matches;applyMode();});
listen(window,'pagehide',()=>{studyCleanup.forEach(cleanup=>cleanup());studyAbort.abort();});
const reading=text=>q('#reading').textContent=text;

const methodMarks=qa('.method-mark');let methodTweens=[];
function inspect(){reading(['to','from','fromTo'].map((name,i)=>name+': '+Number(gsap.getProperty(methodMarks[i],'x')).toFixed(0)+'px').join(' / '));if(methodTweens[0])q('#progress').value=Math.round(methodTweens[0].progress()*100);}
function rest(){methodTweens.forEach(t=>t.kill());methodTweens=[];gsap.set(methodMarks,{x:80});q('#progress').value=0;inspect();}
function buildMethods(){rest();const options={duration:1,ease:'power1.inOut',paused:true,onUpdate:inspect};methodTweens=[gsap.to(methodMarks[0],{...options,x:160}),gsap.from(methodMarks[1],{...options,x:0}),gsap.fromTo(methodMarks[2],{x:0},{...options,x:160})];inspect();}
listen(q('#play'),'click',()=>{buildMethods();methodTweens.forEach(t=>isStatic()?t.progress(1,true):t.play());inspect();});listen(q('#rest'),'click',rest);listen(q('#progress'),'input',e=>{const progress=Number(e.target.value)/100;if(!methodTweens.length)buildMethods();methodTweens.forEach(t=>t.pause().progress(progress,true));inspect();});applyMode=rest;studyCleanup.push(()=>methodTweens.forEach(t=>t.kill()));rest();

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GSAP 3.15.0: Copyright 2026, GreenSock. All rights reserved. Subject to https://gsap.com/standard-license. Original library notices are preserved.