专注工具多阶段加载器
在专注工具场景中完成多阶段加载器：包含真实内容、可操作控件、清晰状态反馈和跨尺寸布局。
启用 JavaScript 后可编辑、运行和保存此案例。固定源码如下：
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>专注工具多阶段加载器</title>
<style>
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.panel{padding:22px;border:1px solid var(--line);background:color-mix(in srgb,#fff 58%,transparent)}.stack{display:grid;gap:15px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.action{min-height:44px;padding:10px 17px;border:1px solid var(--ink);border-radius:999px;background:transparent}.action.primary,.action.is-active{color:var(--paper);background:var(--accent)}.muted{opacity:.68}.status{min-height:24px;margin-top:15px;color:var(--accent);font-weight:800}.metric{font-size:clamp(30px,6vw,58px);font-weight:900}.meter{height:9px;overflow:hidden;border-radius:999px;background:color-mix(in srgb,var(--ink) 12%,transparent)}.meter>i{display:block;height:100%;background:var(--accent)}.chip{padding:6px 9px;border:1px solid var(--line);border-radius:999px;font-size:12px}
.composition-index{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px}.index-mark{display:grid;align-content:space-between;width:76px;padding:16px 10px;border:1px solid var(--line);color:var(--accent);background:color-mix(in srgb,var(--paper) 82%,transparent);text-align:center}.index-mark strong{font:900 34px/1 ui-monospace,monospace}.index-mark span{writing-mode:vertical-rl;font:800 10px/1.2 ui-monospace,monospace;letter-spacing:.18em}.composition-index .demo{grid-column:1;grid-row:1}.composition-index::before{content:"";position:absolute;left:-12px;top:38px;width:5px;height:45%;background:linear-gradient(var(--accent),var(--secondary))}@media(max-width:700px){.composition-index{grid-template-columns:1fr}.index-mark{grid-row:1;width:auto;grid-template-columns:auto 1fr}.index-mark span{writing-mode:horizontal-tb}.composition-index .demo{grid-row:2}}
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</style>
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<body data-aesthetic="organic" data-composition="field-index">
<main class="page">
<header class="mast"><div><span class="eyebrow">organic / 多阶段加载器 / INTERMEDIATE</span><h1>专注工具多阶段加载器</h1><p class="intro">在专注工具场景中完成多阶段加载器：包含真实内容、可操作控件、清晰状态反馈和跨尺寸布局。</p></div><span class="scenario">专注工具</span></header>
<div class="composition-index"><section class="demo" aria-label="专注工具多阶段加载器交互区域"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">专注工具 SESSION</span><h2>专注回合计时台</h2></div><output id="workflowSessionClock">00:45</output><label>回合时长<input id="workflowSessionLength" type="range" min="15" max="90" step="15" value="45"><span>秒</span></label><button id="workflowSessionToggle" class="action primary" type="button">开始专注</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="专注回合进度" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div><section id="workflowCore" class="workflow-core session-stage" data-session-phase="ready" tabindex="-1"><!-- 11DZ_CORE_START:animation-microinteractions-css-loader --><div class="stage-loader panel"><header><span class="eyebrow">MULTI-STAGE LOADER</span><h2>专注工具处理队列</h2></header><div id="loaderTrack" class="loader-track" role="progressbar" aria-label="三阶段加载进度" aria-valuemin="0" aria-valuemax="3" aria-valuenow="0"><i></i><i></i><i></i><span></span></div><ol id="loaderSteps"><li>准备资源</li><li>处理内容</li><li>完成校验</li></ol><button id="startLoader" class="action primary" type="button" data-core-bridge="animation-microinteractions-css-loader">开始加载</button></div><!-- 11DZ_CORE_END --></section><footer class="session-log"><strong id="workflowSessionScore">0 个交互检查点</strong><ol id="workflowSessionLaps" aria-label="回合记录"></ol></footer></div><p id="status" class="status" role="status" aria-live="polite"></p></section><aside class="index-mark" aria-hidden="true"><strong>05</strong><span>专注工具 FIELD INDEX</span></aside></div>
</main>
<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:animation-microinteractions-css-loader */
const loaderTrack=document.querySelector('#loaderTrack');const loaderDots=[...loaderTrack.querySelectorAll('i')];const loaderLabels=[...document.querySelectorAll('#loaderSteps li')];let loaderTimers=[];let loaderRun=0;document.querySelector('#startLoader').addEventListener('click',event=>{loaderTimers.forEach(clearTimeout);loaderTimers=[];loaderRun+=1;loaderTrack.dataset.run=String(loaderRun);loaderTrack.classList.add('is-running');loaderDots.forEach(dot=>dot.classList.remove('is-done'));loaderLabels.forEach(label=>label.classList.remove('is-active'));loaderTrack.setAttribute('aria-valuenow','0');event.currentTarget.textContent=loaderRun===1?'重新开始加载':'重新开始 · 第 '+loaderRun+' 次';announce('已启动第 '+loaderRun+' 次本地加载');loaderDots.forEach((dot,index)=>loaderTimers.push(setTimeout(()=>{dot.classList.add('is-done');loaderLabels[index].classList.add('is-active');loaderTrack.setAttribute('aria-valuenow',String(index+1));announce('已完成阶段 '+(index+1)+'：'+loaderLabels[index].textContent);if(index===loaderDots.length-1){loaderTrack.classList.remove('is-running');event.currentTarget.textContent='重新加载';}},(index+1)*450)));});
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"animation-microinteractions-css-loader","selector":"[data-core-bridge=\"animation-microinteractions-css-loader\"]","mode":"click","key":"Enter"};const workflowBridgeCore=document.querySelector('#workflowCore');const workflowBridgeControl=workflowBridgeCore.querySelector(workflowBridgeSpec.selector);if(!workflowBridgeControl)throw new Error('Missing core bridge: '+workflowBridgeSpec.name);const workflowBridgeControlledId=workflowBridgeControl.getAttribute('aria-controls');const workflowBridgeControlled=workflowBridgeControlledId?document.getElementById(workflowBridgeControlledId):null;workflowBridgeCore.dataset.workflowBridge=workflowBridgeSpec.name;workflowBridgeCore.dataset.workflowVersion='0';function workflowBridgeSerialize(){const visualNode=workflowBridgeCore.firstElementChild||workflowBridgeCore;const visual=getComputedStyle(visualNode);const outputs=[...workflowBridgeCore.querySelectorAll('output,[role="status"],[aria-live],meter,progress')].map(node=>node.textContent.trim()+'|'+node.getAttribute('aria-valuenow')+'|'+node.getAttribute('value'));const canvas=[...workflowBridgeCore.querySelectorAll('canvas')].map(node=>{try{return node.toDataURL().slice(-160);}catch{return 'canvas-unavailable';}});return JSON.stringify({html:workflowBridgeCore.innerHTML,status:statusOutput.textContent,outputs,canvas,visual:[visual.display,visual.visibility,visual.opacity,visual.transform,visual.filter,visual.backgroundColor,visual.width,visual.height],scroll:workflowBridgeSpec.mode==='scroll'?workflowBridgeControl.scrollTop:null});}let workflowBridgeLastEffect=workflowBridgeSerialize();function workflowBridgeSummary(){const label=(workflowBridgeControl.getAttribute('aria-label')||workflowBridgeControl.textContent||workflowBridgeControl.value||workflowBridgeSpec.name).trim().replace(/\s+/g,' ').slice(0,72);return label+' · 核心版本 '+workflowBridgeCore.dataset.workflowVersion;}function workflowBridgeCommit(){const effect=workflowBridgeSerialize();if(effect===workflowBridgeLastEffect)return {changed:false,summary:workflowBridgeSummary()};workflowBridgeLastEffect=effect;workflowBridgeCore.dataset.workflowVersion=String(Number(workflowBridgeCore.dataset.workflowVersion||0)+1);return {changed:true,summary:workflowBridgeSummary()};}function workflowBridgeScheduleCommit(){queueMicrotask(workflowBridgeCommit);setTimeout(workflowBridgeCommit,0);}workflowBridgeControl.addEventListener("click",workflowBridgeScheduleCommit);const workflowBridgeStateTargets=new Set(workflowBridgeCore.querySelectorAll('dialog'));if(workflowBridgeControlled&&workflowBridgeCore.contains(workflowBridgeControlled))workflowBridgeStateTargets.add(workflowBridgeControlled);workflowBridgeStateTargets.forEach(target=>['close','cancel','toggle'].forEach(eventName=>target.addEventListener(eventName,workflowBridgeScheduleCommit)));function workflowBridgeActivate(){workflowBridgeControl.focus();workflowBridgeControl.click();const result=workflowBridgeCommit();setTimeout(workflowBridgeCommit,0);return result;}function workflowBridgeReset(){workflowBridgeCore.dataset.workflowVersion='0';workflowBridgeLastEffect=workflowBridgeSerialize();}
const workflowSessionCore=document.querySelector('#workflowCore');const workflowSessionToggle=document.querySelector('#workflowSessionToggle');const workflowSessionLength=document.querySelector('#workflowSessionLength');const workflowSessionState={phase:'ready',elapsed:0,limit:Number(workflowSessionLength.value),checkpoints:[],timer:null};function workflowSessionFormat(seconds){return String(Math.floor(seconds/60)).padStart(2,'0')+':'+String(seconds%60).padStart(2,'0');}function workflowSessionDrive(){const percent=Math.min(100,Math.round(workflowSessionState.elapsed/workflowSessionState.limit*100));document.querySelector('#workflowSessionClock').textContent=workflowSessionFormat(Math.max(0,workflowSessionState.limit-workflowSessionState.elapsed));const progress=document.querySelector('#workflowSessionProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';workflowSessionCore.dataset.sessionPhase=workflowSessionState.phase;document.querySelector('#workflowSessionScore').textContent=workflowSessionState.checkpoints.length+' 个交互检查点';}function workflowSessionLap(label){workflowSessionState.checkpoints.push({label,at:workflowSessionState.elapsed});const item=document.createElement('li');item.textContent=label+' · '+workflowSessionFormat(workflowSessionState.elapsed);document.querySelector('#workflowSessionLaps').append(item);workflowSessionDrive();}function workflowSessionStop(complete=false){clearInterval(workflowSessionState.timer);workflowSessionState.timer=null;workflowSessionState.phase=complete?'complete':'paused';workflowSessionToggle.textContent=complete?'重新开始':'继续回合';workflowSessionToggle.setAttribute('aria-pressed','false');workflowSessionDrive();announce(complete?'专注回合回合完成':'回合已暂停');}function workflowSessionStart(){if(workflowSessionState.phase==='complete'){workflowSessionState.elapsed=0;workflowSessionState.checkpoints=[];document.querySelector('#workflowSessionLaps').replaceChildren();}workflowSessionState.phase='running';workflowSessionToggle.textContent='暂停回合';workflowSessionToggle.setAttribute('aria-pressed','true');const bridge=workflowBridgeActivate();workflowSessionLap(bridge.summary);clearInterval(workflowSessionState.timer);workflowSessionState.timer=setInterval(()=>{workflowSessionState.elapsed+=1;if(workflowSessionState.elapsed>=workflowSessionState.limit){workflowSessionStop(true);return;}workflowSessionDrive();},1000);workflowSessionDrive();announce('专注回合回合已开始 · '+bridge.summary);}workflowSessionToggle.addEventListener('click',()=>workflowSessionState.phase==='running'?workflowSessionStop():workflowSessionStart());workflowSessionLength.addEventListener('input',()=>{workflowSessionState.limit=Number(workflowSessionLength.value);workflowSessionState.elapsed=Math.min(workflowSessionState.elapsed,workflowSessionState.limit);workflowSessionDrive();});workflowSessionCore.addEventListener('keydown',event=>{if(event.key==='Enter'||event.key===' '){workflowSessionLap('键盘操作');}});workflowSessionCore.addEventListener('click',event=>{if(event.target.closest('[data-core-bridge]'))workflowSessionLap('核心操作 · '+workflowBridgeSummary());});document.addEventListener('visibilitychange',()=>{if(document.hidden&&workflowSessionState.phase==='running')workflowSessionStop();});workflowSessionDrive();
workflowBridgeReset();
</script>
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