绘图与数据可视化
空气质量时间轴图表

在空气质量场景中完成时间轴图表：包含真实内容、可操作控件、清晰状态反馈和跨尺寸布局。
绘图与数据可视化时间轴图表HTMLCanvasJavaScript
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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  <title>空气质量时间轴图表</title>
  <style>
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    .page{width:min(1320px,calc(100% - 56px));margin:auto;padding:10vh 0}.mast{display:grid;grid-template-columns:minmax(0,1fr) 160px;gap:10vw;margin-block:6vh;align-items:start;margin-bottom:10vh}.mast h1{font-family:Avenir,"PingFang SC",sans-serif;font-weight:500;font-size:clamp(38px,8vw,88px);letter-spacing:-.055em;margin:0;line-height:.96}.eyebrow{display:block;margin-bottom:24px;font:600 10px/1 ui-monospace,monospace;letter-spacing:.22em}.intro{max-width:52ch;margin-top:28px;line-height:1.8}.scenario{font-size:13px;text-align:right}.demo{border-radius:1px;border-color:color-mix(in srgb,var(--ink) 35%,transparent);box-shadow:none;position:relative;min-height:420px;padding:clamp(28px,5vw,70px);background:transparent}@media(max-width:700px){.page{width:calc(100% - 24px);padding:36px 0}.mast{grid-template-columns:1fr;margin-bottom:30px}.scenario{text-align:left}.demo{padding:18px}}
    .panel{padding:20px;border:1px solid color-mix(in srgb,var(--accent) 50%,transparent);border-radius:18px;background:color-mix(in srgb,var(--paper) 88%,transparent);box-shadow:inset 0 0 24px color-mix(in srgb,var(--accent) 7%,transparent)}.stack{display:grid;gap:16px}.row{display:flex;flex-wrap:wrap;gap:9px}.action{padding:11px 16px;border:1px solid var(--accent);border-radius:6px;color:var(--accent);background:transparent;box-shadow:0 0 14px color-mix(in srgb,var(--accent) 10%,transparent)}.action.primary,.action.is-active{color:var(--paper);background:var(--accent)}.status{min-height:24px;color:var(--secondary);text-shadow:0 0 10px currentColor}.metric{font-size:clamp(30px,7vw,64px);font-weight:900;text-shadow:0 0 18px color-mix(in srgb,var(--accent) 40%,transparent)}.muted{opacity:.7}.chip{padding:6px 9px;border:1px solid var(--secondary);border-radius:4px}.meter{height:7px;background:color-mix(in srgb,var(--accent) 15%,transparent)}.meter>i{display:block;height:100%;box-shadow:0 0 12px var(--accent);background:var(--accent)}
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<body data-aesthetic="minimal" data-composition="control-deck">
  <main class="page">
    <header class="mast"><div><span class="eyebrow">minimal / 时间轴图表 / BEGINNER</span><h1>空气质量时间轴图表</h1><p class="intro">在空气质量场景中完成时间轴图表：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">空气质量</span></header>
    <div class="composition-deck"><div class="deck-bar"><span>CONTROL DECK · 04</span><span>时间轴图表</span><span class="deck-lights" aria-hidden="true"><i></i><i></i><i></i></span></div><section class="demo" aria-label="空气质量时间轴图表交互区域"><div class="workflow-dispatch"><aside class="dispatch-console"><span class="eyebrow">空气质量 DISPATCH</span><h2>空气站点调度台</h2><form id="workflowDispatchForm"><label>任务类型<select id="workflowDispatchKind"><option>道路站</option><option>公园站</option><option>社区站</option></select></label><label>AQI 阈值<input id="workflowDispatchAmount" type="number" min="1" max="9999" value="39"><span>AQI</span></label><fieldset><legend>处理优先级</legend><label><input type="radio" name="workflowPriority" value="normal" checked>常规</label><label><input type="radio" name="workflowPriority" value="urgent">紧急</label></fieldset><button class="action primary" type="submit">开始监测</button></form><label>当前任务<select id="workflowDispatchActive" aria-label="切换当前任务"><option value="1">道路站</option><option value="2">公园站</option></select></label><output id="workflowDispatchSummary">等待调度</output></aside><section id="workflowCore" class="workflow-core dispatch-workbench" data-dispatch-priority="normal"><!-- 11DZ_CORE_START:drawing-data-viz-timeline-chart --><div class="drawing-pattern drawing-pattern-7"><div class="canvas-shell"><canvas id="artboard" width="900" height="440" aria-label="时间轴图表画布" aria-describedby="canvasDescription"></canvas><div class="canvas-tools panel"><span class="eyebrow">CANVAS MODE 8</span><h2>时间轴图表</h2><label>复杂度 <input id="canvasAmount" type="range" min="4" max="28" value="31"></label><button id="redrawCanvas" class="action primary" type="button">重新绘制</button><p id="canvasDescription" class="muted">深色画布使用两种高对比色绘制时间轴图表，复杂度滑块决定图形数量；画面完全在浏览器本地生成。</p></div></div><form id="timelineMilestoneForm" class="drawing-controller timeline-controller"><header><span class="eyebrow">MILESTONE EDITOR</span><h3>空气质量时间轴</h3></header><label>日期<input id="timelineDate" type="date" value="2026-07-13"></label><label>里程碑<input id="timelineLabel" required value="阶段复核"></label><button class="action" type="submit" data-core-bridge="drawing-data-viz-timeline-chart">加入时间轴</button><ol id="timelineMilestones"><li data-day="1">启动</li><li data-day="12">复核</li></ol></form></div><!-- 11DZ_CORE_END --></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
  </main>
  <script>
    'use strict';
    const statusOutput = document.querySelector('#status');
    const announce = message => { statusOutput.textContent = message; };
    /* 11DZ_CORE_SCRIPT_START:drawing-data-viz-timeline-chart */
const canvas = document.querySelector('#artboard'); const context = canvas.getContext('2d'); const amount = document.querySelector('#canvasAmount'); let drawSeed = 3765429924;
    function random(){ drawSeed = (drawSeed * 1664525 + 1013904223) >>> 0; return drawSeed / 4294967296; }
    function drawCanvas(){ const rect = canvas.getBoundingClientRect(); const ratio = Math.min(2,window.devicePixelRatio || 1); canvas.width = Math.max(320,Math.round(rect.width * ratio)); canvas.height = Math.max(240,Math.round(rect.height * ratio)); context.setTransform(ratio,0,0,ratio,0,0); const width = rect.width; const height = rect.height; context.clearRect(0,0,width,height); context.fillStyle = '#17241d'; context.fillRect(0,0,width,height); const drawingFactor=Number(canvas.dataset.drawingFactor||1); const count=Math.max(1,Math.round(Number(amount.value)*drawingFactor)); drawSeed += 1+Number(canvas.dataset.drawingShift||0); context.globalCompositeOperation=canvas.dataset.drawingBlend||'source-over';
      for(let index=0; index<count; index+=1){ const x=random()*width; const y=random()*height; const size=(10+random()*70)*Math.max(.45,drawingFactor); context.beginPath(); context.strokeStyle=index%2?'#af4f45':'#9eb49f'; context.fillStyle=context.strokeStyle+'88'; context.lineWidth=(2+random()*4)*Math.max(.6,drawingFactor);
        context.moveTo(width*.08+index*(width*.84/count),height*.78); context.lineTo(width*.08+index*(width*.84/count),height*.25+random()*height*.4); context.stroke(); context.arc(width*.08+index*(width*.84/count),height*.25+random()*height*.4,5,0,Math.PI*2); context.fill();
      } context.globalCompositeOperation='source-over'; announce('画布已生成 ' + count + ' 个图形元素'); }
    document.querySelector('#redrawCanvas').addEventListener('click',drawCanvas); amount.addEventListener('input',drawCanvas); addEventListener('resize',drawCanvas,{passive:true}); drawCanvas();
const timelineForm=document.querySelector('#timelineMilestoneForm');const timelineEvents=[{day:1,label:'启动'},{day:12,label:'复核'}];function drawTimelineModel(){document.querySelector('#timelineMilestones').replaceChildren(...timelineEvents.sort((left,right)=>left.day-right.day).map(entry=>{const item=document.createElement('li');item.dataset.day=String(entry.day);item.textContent=entry.day+' 日 · '+entry.label;item.addEventListener('dblclick',()=>{timelineEvents.splice(timelineEvents.indexOf(entry),1);drawTimelineModel();});return item;}));canvas.dataset.drawingFactor=String(.6+timelineEvents.length*.18);canvas.dataset.drawingShift=String(timelineEvents.reduce((sum,event)=>sum+event.day,0));drawCanvas();}timelineForm.addEventListener('submit',event=>{event.preventDefault();const date=new Date(document.querySelector('#timelineDate').value+'T00:00:00');timelineEvents.push({day:date.getDate(),label:document.querySelector('#timelineLabel').value.trim()});drawTimelineModel();announce('里程碑已加入时间轴，双击可移除');});drawTimelineModel();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"drawing-data-viz-timeline-chart","selector":"[data-core-bridge=\"drawing-data-viz-timeline-chart\"]","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 workflowDispatchCore=document.querySelector('#workflowCore');const workflowDispatchForm=document.querySelector('#workflowDispatchForm');const workflowDispatchSelect=document.querySelector('#workflowDispatchActive');const workflowDispatchJobs=new Map([["1",{"label":"道路站","amount":12,"priority":"normal","touches":0}],["2",{"label":"公园站","amount":21,"priority":"urgent","touches":0}]]);let workflowDispatchSerial=workflowDispatchJobs.size;function workflowDispatchDrive(job,activate=false){workflowDispatchCore.dataset.dispatchPriority=job.priority;workflowDispatchCore.style.setProperty('--dispatch-load',Math.min(.95,.16+job.amount/120));const bridge=activate?workflowBridgeActivate():{changed:false,summary:workflowBridgeSummary()};document.querySelector('#workflowDispatchSummary').textContent=job.label+' · '+job.amount+' AQI · '+bridge.summary;announce('空气站点当前任务：'+job.label);}function workflowDispatchRender(activeId,activate=false){workflowDispatchSelect.replaceChildren(...[...workflowDispatchJobs].map(([id,job])=>{const option=document.createElement('option');option.value=id;option.textContent=job.label+(job.priority==='urgent'?' · 紧急':'');return option;}));workflowDispatchSelect.value=activeId;workflowDispatchDrive(workflowDispatchJobs.get(activeId),activate);}workflowDispatchForm.addEventListener('submit',event=>{event.preventDefault();const data=new FormData(workflowDispatchForm);const id=String(++workflowDispatchSerial);workflowDispatchJobs.set(id,{label:document.querySelector('#workflowDispatchKind').value,amount:Math.max(1,Number(document.querySelector('#workflowDispatchAmount').value)||1),priority:data.get('workflowPriority'),touches:0});workflowDispatchRender(id,true);});workflowDispatchSelect.addEventListener('change',()=>workflowDispatchDrive(workflowDispatchJobs.get(workflowDispatchSelect.value),true));workflowDispatchCore.addEventListener('focusin',()=>{const job=workflowDispatchJobs.get(workflowDispatchSelect.value);if(!job)return;job.touches+=1;document.querySelector('#workflowDispatchSummary').textContent=job.label+' · '+job.amount+' AQI · '+workflowBridgeSummary();});workflowDispatchRender('1',false);
workflowBridgeReset();
  </script>
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