Interactive air quality bar chart
Complete an interactive bar chart for an air quality scenario: includes real content, interactive controls, clear status feedback, and responsive layouts across sizes.
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<title>Interactive air quality bar chart</title>
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<main class="page">
<header class="mast"><div><span class="eyebrow">dark-neon / interactive bar chart / INTERMEDIATE</span><h1>Interactive air quality bar chart</h1><p class="intro">Complete an interactive bar chart for an air quality scenario: includes real content, interactive controls, clear status feedback, and responsive layouts across sizes.</p></div><span class="scenario">Air Quality</span></header>
<div class="composition-index"><section class="demo" aria-label="Air Quality Interactive Bar Chart Interaction Area"><div class="workflow-dispatch"><aside class="dispatch-console"><span class="eyebrow">Air Quality DISPATCH</span><h2>Air Station Control Desk</h2><form id="workflowDispatchForm"><label>Task Type<select id="workflowDispatchKind"><option>Roadside Station</option><option>Park Station</option><option>Community Station</option></select></label><label>AQI threshold<input id="workflowDispatchAmount" type="number" min="1" max="9999" value="18"><span>AQI</span></label><fieldset><legend>Processing priority</legend><label><input type="radio" name="workflowPriority" value="normal" checked>Regular</label><label><input type="radio" name="workflowPriority" value="urgent">Urgent</label></fieldset><button class="action primary" type="submit">Start monitoring</button></form><label>Current task<select id="workflowDispatchActive" aria-label="Switch current task"><option value="1">Roadside Station</option><option value="2">Park Station</option></select></label><output id="workflowDispatchSummary">Waiting for Dispatch</output></aside><section id="workflowCore" class="workflow-core dispatch-workbench" data-dispatch-priority="normal"><!-- 11DZ_CORE_START:drawing-data-viz-bar-chart --><div class="drawing-pattern drawing-pattern-0"><div class="canvas-shell"><canvas id="artboard" width="900" height="440" aria-label="Interactive bar chart canvas" aria-describedby="canvasDescription"></canvas><div class="canvas-tools panel"><span class="eyebrow">CANVAS MODE 1</span><h2>Interactive Bar Chart</h2><label>Complexity <input id="canvasAmount" type="range" min="4" max="28" value="10"></label><button id="redrawCanvas" class="action primary" type="button">Redraw</button><p id="canvasDescription" class="muted">A dark canvas uses two high-contrast colors to draw an interactive bar chart, with the complexity slider determining the number of shapes; everything is generated entirely locally in the browser.</p></div></div><form id="barChartController" class="drawing-controller bar-chart-controller"><header><span class="eyebrow">BAR DATA MODEL</span><h3>Grouped bar chart for air quality</h3></header><label>Group by<select id="barGrouping"><option value="station">By station</option><option value="period">By Time Period</option><option value="status">By status</option></select></label><label>Baseline<input id="barBaseline" type="range" min="20" max="90" value="55" data-core-bridge="drawing-data-viz-bar-chart"><output id="barBaselineValue">55</output></label><button class="action" type="submit">Normalize and redraw</button><output id="barChartSummary">3 group · benchmark 55</output></form></div><!-- 11DZ_CORE_END --></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section><aside class="index-mark" aria-hidden="true"><strong>05</strong><span>Air Quality FIELD INDEX</span></aside></div>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:drawing-data-viz-bar-chart */
const canvas = document.querySelector('#artboard'); const context = canvas.getContext('2d'); const amount = document.querySelector('#canvasAmount'); let drawSeed = 905959552;
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 = '#18332f'; 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?'#d45f3e':'#8fc4ad'; context.fillStyle=context.strokeStyle+'88'; context.lineWidth=(2+random()*4)*Math.max(.6,drawingFactor);
const barWidth=Math.max(6,(width-36)/count); context.fillRect(18+index*barWidth,height-size*2,barWidth*.62,size*2);
} context.globalCompositeOperation='source-over'; announce('Canvas generated ' + count + ' graphic elements'); }
document.querySelector('#redrawCanvas').addEventListener('click',drawCanvas); amount.addEventListener('input',drawCanvas); addEventListener('resize',drawCanvas,{passive:true}); drawCanvas();
const barGrouping=document.querySelector('#barGrouping');const barBaseline=document.querySelector('#barBaseline');const barChartState={group:'station',baseline:55,normalized:false};function applyBarChartModel(){barChartState.group=barGrouping.value;barChartState.baseline=Number(barBaseline.value);canvas.dataset.drawingFactor=String(.72+barChartState.baseline/180);canvas.dataset.drawingShift=String(['station','period','status'].indexOf(barChartState.group)*11);document.querySelector('#barBaselineValue').textContent=barChartState.baseline;document.querySelector('#barChartSummary').textContent=(barChartState.group==='station'?'3 sites':barChartState.group==='period'?'4 time periods':'3 states')+' · Benchmark '+barChartState.baseline;drawCanvas();}barGrouping.addEventListener('change',applyBarChartModel);barBaseline.addEventListener('input',applyBarChartModel);document.querySelector('#barChartController').addEventListener('submit',event=>{event.preventDefault();barChartState.normalized=true;amount.value='12';applyBarChartModel();announce('Bar data normalized to baseline');});applyBarChartModel();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"drawing-data-viz-bar-chart","selector":"[data-core-bridge=\"drawing-data-viz-bar-chart\"]","mode":"range","key":"ArrowRight"};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+' · Core Version '+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("input",workflowBridgeScheduleCommit);workflowBridgeControl.addEventListener('change',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();const step=Number(workflowBridgeControl.step)||1;const min=workflowBridgeControl.min===''?-Infinity:Number(workflowBridgeControl.min);const max=workflowBridgeControl.max===''?Infinity:Number(workflowBridgeControl.max);let next=Math.min(max,Math.max(min,(Number(workflowBridgeControl.value)||0)+step));if(next===Number(workflowBridgeControl.value))next=Math.max(min,Number(workflowBridgeControl.value)-step);workflowBridgeControl.value=String(next);workflowBridgeControl.dispatchEvent(new Event('input',{bubbles:true}));workflowBridgeControl.dispatchEvent(new Event('change',{bubbles:true}));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":"Roadside Station","amount":12,"priority":"normal","touches":0}],["2",{"label":"Park Station","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('Current tasks at the air quality station:'+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'?' · Urgent':'');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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