Desert Station Cursor Trail Effect
Complete a pointer light-trail effect for the desert station scenario: include real content, interactive controls, clear status feedback, and cross-size layouts.
With JavaScript enabled, you can edit, run, and save this example. The fixed source is as follows:
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<title>Desert Station Cursor Trail Effect</title>
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<header class="mast"><div><span class="eyebrow">dashboard / Pointer Trail Effects / INTERMEDIATE</span><h1>Desert Station Cursor Trail Effect</h1><p class="intro">Complete a pointer light-trail effect for the desert station scenario: include real content, interactive controls, clear status feedback, and cross-size layouts.</p></div><span class="scenario">Wasteland station</span></header>
<div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>Master the semantic structure, responsive layout, keyboard interaction, and state synchronization of a pointer trail effect.</span></aside><section class="demo" aria-label="Wasteland Station Pointer Trail Interaction Area"><section id="atlasShell" class="atlas-shell" data-atlas-mode="brief"><header class="atlas-head"><div><span class="eyebrow">Wasteland Station / ATLAS DOSSIER</span><h2>Pointer trail effect sample atlas</h2><p>Rewrap the main case with a graph-style sample page, separating sample index, tracking view, handoff notes, and field records.</p></div><div class="atlas-controls"><div class="atlas-modes"><button class="action primary" type="button" data-atlas-mode="brief">Briefing</button><button class="action" type="button" data-atlas-mode="trace">Track</button><button class="action" type="button" data-atlas-mode="handoff">Handoff</button></div><output id="atlasState">Waiting to create sample</output></div></header><div class="atlas-body"><aside class="atlas-index"><ol class="atlas-chapters"><li><button type="button" data-atlas-card="0" aria-pressed="true"><span>01</span><strong>Wasteland Station Overview</strong><small>Check whether the status change is visible</small></button></li><li><button type="button" data-atlas-card="1" aria-pressed="false"><span>02</span><strong>Wasteland Site Plan</strong><small>Confirm keyboard and click entry points are consistent</small></button></li><li><button type="button" data-atlas-card="2" aria-pressed="false"><span>03</span><strong>Desert station inspiration</strong><small>Check whether the layout falls back on narrow screens</small></button></li><li><button type="button" data-atlas-card="3" aria-pressed="false"><span>04</span><strong>Wasteland station log</strong><small>Record current review conclusion</small></button></li></ol><label>Layout scale<input id="atlasZoom" type="range" min="82" max="132" value="100"><output id="atlasZoomValue">100%</output></label><label>Sampling focus<select id="atlasFocus"><option value="0">Wasteland Station Overview</option><option value="1">Wasteland Site Plan</option><option value="2">Desert station inspiration</option><option value="3">Wasteland station log</option></select></label><button id="atlasCapture" class="action primary" type="button">Featured sample</button><dl class="atlas-meta"><div><dt>Number of Entries</dt><dd id="atlasCount">0</dd></div><div><dt>Current focus</dt><dd id="atlasCurrent">Wasteland Station Overview</dd></div><div><dt>Review Mode</dt><dd id="atlasModeLabel">Briefing</dd></div></dl></aside><section class="atlas-stage"><div class="atlas-summary"><article data-active="true"><span>Sample</span><strong>Wasteland Station Overview</strong><p>Check whether the status change is visible</p></article><article><span>Trace</span><strong>Wasteland Site Plan</strong><p>Confirm keyboard and click entry points are consistent</p></article><article><span>Signal</span><strong>Desert station inspiration</strong><p>Check whether the layout falls back on narrow screens</p></article><article><span>Handoff</span><strong>Wasteland station log</strong><p>Record current review conclusion</p></article></div><div id="atlasCoreShell" class="atlas-core-shell"><div class="workflow-compare"><form id="workflowCompareControls" class="compare-controls"><fieldset><legend>Reference Channel</legend><label><input type="radio" name="workflowChannel" value="A" checked>A · Wilderness Station Base Layer</label><label><input type="radio" name="workflowChannel" value="B">B · Dynamic Layers of the Wasteland Station</label></fieldset><label>Visual Intensity Weight<input id="workflowCompareWeight" type="range" min="10" max="90" value="50"><output id="workflowCompareWeightValue">50 %</output></label><label><input id="workflowCompareFreeze" type="checkbox">Freeze current version</label><button id="workflowCompareCapture" class="action primary" type="button">Sample and apply effects</button><ol id="workflowCompareShelf" aria-label="Version Sampling Record"></ol></form><section class="compare-stage"><header><span class="eyebrow">Wasteland Station COMPARE</span><h2>Desert Station dual-version comparison</h2><output id="workflowCompareLive">Version A waiting for sampling</output></header><section id="workflowCore" class="workflow-core compare-core" data-compare-channel="A" style="--compare-split:50%"><!-- 11DZ_CORE_START:creative-effects-cursor-trail --><div class="cursor-trail-lab" data-trail-layout="aurora-band"><section class="trail-stage"><canvas id="trailCanvas" width="960" height="460" tabindex="0" aria-label="Wasteland Station cursor trail canvas; move the pointer or use the arrow keys to draw a trail" aria-describedby="trailHelp">Your browser does not support Canvas.</canvas><div><span>Wasteland station</span><h2>Aurora trails cross the observation band and leave a colorful afterglow</h2><p id="trailHelp">Move the mouse, touch the canvas, or focus it and use the arrow keys to draw.</p></div></section><aside class="trail-controls panel"><span class="eyebrow">CURSOR TRAIL</span><h2>Aurora Observation Zone</h2><label>Light trail length <input id="trailLength" type="range" min="12" max="90" value="72" data-core-bridge="creative-effects-cursor-trail"><output id="trailLengthValue">72</output></label><label>Light Dot Size <input id="trailSize" type="range" min="3" max="18" value="6"><output id="trailSizeValue">6px</output></label><button id="trailClear" class="action" type="button">Clear light trail</button></aside></div><!-- 11DZ_CORE_END --></section></section></div></div><ol id="atlasLog" class="atlas-log"><li>Waiting for the first graph sample</li></ol></section></div></section><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"creative-effects-cursor-trail","selector":"[data-core-bridge=\"creative-effects-cursor-trail\"]","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 workflowCompareCore=document.querySelector('#workflowCore');const workflowCompareWeight=document.querySelector('#workflowCompareWeight');const workflowCompareState={channel:'A',weight:50,frozen:false,snapshots:[]};function workflowCompareFingerprint(){const controls=[...workflowCompareCore.querySelectorAll('input,select,textarea')];const outputs=[...workflowCompareCore.querySelectorAll('output,[role="status"],strong')].map(node=>node.textContent.trim()).filter(Boolean);return {controlValues:controls.map(control=>control.type==='checkbox'||control.type==='radio'?control.checked:control.value),summary:outputs.slice(0,4).join(' / '),nodes:workflowCompareCore.querySelectorAll('*').length};}function workflowCompareDrive(){workflowCompareCore.dataset.compareChannel=workflowCompareState.channel;workflowCompareCore.style.setProperty('--compare-split',workflowCompareState.weight+'%');document.querySelector('#workflowCompareWeightValue').textContent=workflowCompareState.weight+' %';document.querySelector('#workflowCompareLive').textContent=workflowCompareState.channel+' Version · '+workflowCompareState.weight+' %'+(workflowCompareState.frozen?' · Frozen':'');announce('The desert station is being viewed '+workflowCompareState.channel+' Version');}function workflowCompareCapture(source){const bridge=workflowBridgeActivate();const snapshot={...workflowCompareFingerprint(),channel:workflowCompareState.channel,weight:workflowCompareState.weight,source,bridge:bridge.summary};workflowCompareState.snapshots.push(snapshot);const item=document.createElement('li');item.innerHTML='<b>'+snapshot.channel+'</b><span>'+(snapshot.summary||snapshot.bridge)+'</span><small>'+snapshot.weight+' % · '+snapshot.bridge+'</small>';document.querySelector('#workflowCompareShelf').prepend(item);announce('sampled '+snapshot.channel+' Version and apply effects · '+bridge.summary);}document.querySelectorAll('[name="workflowChannel"]').forEach(input=>input.addEventListener('change',()=>{workflowCompareState.channel=input.value;workflowCompareDrive();}));workflowCompareWeight.addEventListener('input',()=>{workflowCompareState.weight=Number(workflowCompareWeight.value);workflowCompareDrive();});document.querySelector('#workflowCompareFreeze').addEventListener('change',event=>{workflowCompareState.frozen=event.currentTarget.checked;workflowCompareDrive();});document.querySelector('#workflowCompareCapture').addEventListener('click',()=>workflowCompareCapture('Button Sampling'));workflowCompareCore.addEventListener('dblclick',()=>workflowCompareCapture('Main view double-click'));workflowCompareDrive();
workflowBridgeReset();
const atlasShell=document.querySelector('#atlasShell');const atlasState=document.querySelector('#atlasState');const atlasZoom=document.querySelector('#atlasZoom');const atlasZoomValue=document.querySelector('#atlasZoomValue');const atlasFocus=document.querySelector('#atlasFocus');const atlasCurrent=document.querySelector('#atlasCurrent');const atlasCount=document.querySelector('#atlasCount');const atlasModeLabel=document.querySelector('#atlasModeLabel');const atlasCards=[...document.querySelectorAll('[data-atlas-card]')];const atlasSummary=[...document.querySelectorAll('.atlas-summary article')];const atlasLog=document.querySelector('#atlasLog');const atlasModeButtons=[...atlasShell.querySelectorAll('[data-atlas-mode]')];const atlasNotes=["Wasteland Station Overview","Wasteland Site Plan","Desert station inspiration","Wasteland station log"];const atlasCore=document.querySelector('#workflowCore');let atlasCaptures=0;function atlasSetActive(index){atlasCards.forEach((button,buttonIndex)=>button.setAttribute('aria-pressed',String(buttonIndex===index)));atlasSummary.forEach((card,cardIndex)=>{if(cardIndex===index)card.setAttribute('data-active','true');else card.removeAttribute('data-active');});atlasCurrent.textContent=atlasNotes[index]||atlasNotes[0]||'Unnamed Focus';}function atlasRender(reason){const version=atlasCore?.dataset.workflowVersion||'0';const zoom=Number(atlasZoom.value);const active=Math.min(atlasNotes.length-1,Number(atlasFocus.value)||0);atlasShell.style.setProperty('--atlas-zoom',String(zoom));atlasZoomValue.textContent=zoom+'%';atlasCount.textContent=String(atlasCaptures);atlasSetActive(active);atlasModeLabel.textContent={brief:'Briefing',trace:'Track',handoff:'Handoff'}[atlasShell.dataset.atlasMode]||'Briefing';atlasState.textContent=reason+' · Core Version '+version;}atlasModeButtons.forEach(button=>button.addEventListener('click',()=>{atlasModeButtons.forEach(item=>item.classList.toggle('primary',item===button));atlasShell.dataset.atlasMode=button.dataset.atlasMode;atlasRender('Switched to'+button.textContent);announce('Chart Mode:'+button.textContent);}));atlasCards.forEach((button,index)=>button.addEventListener('click',()=>{atlasFocus.value=String(index);atlasRender('Sample focus switched');announce('Chart focus:'+atlasNotes[index]);}));atlasZoom.addEventListener('input',()=>{atlasRender('Layout scale updated');announce('Graph Magnification '+atlasZoom.value+'%');});atlasFocus.addEventListener('change',()=>{atlasRender('Sampling Focus Switched');announce('Sampling Focus:'+atlasNotes[Number(atlasFocus.value)||0]);});document.querySelector('#atlasCapture').addEventListener('click',()=>{const index=Math.min(atlasNotes.length-1,Number(atlasFocus.value)||0);const note=atlasNotes[index]||atlasNotes[0]||'Unnamed Focus';const version=atlasCore?.dataset.workflowVersion||'0';atlasCaptures+=1;const item=document.createElement('li');item.textContent='Sample '+atlasCaptures+' · '+note+' · Core Version '+version;const empty=atlasLog.querySelector('li')?.textContent==='Waiting for the first graph sample';if(empty)atlasLog.replaceChildren(item);else atlasLog.prepend(item);while(atlasLog.children.length>6)atlasLog.lastElementChild.remove();atlasRender('Included in sample '+atlasCaptures);announce('Included in sample '+atlasCaptures+' · '+note);});atlasCore?.addEventListener('focusin',()=>atlasRender('Main Case Gets Focus'));atlasCore?.addEventListener('click',()=>atlasRender('Primary example interaction'));atlasRender('Waiting to create sample');
</script>
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