Deep-sea cursor trail effect
Create a pointer trail effect in a deep-sea scene: includes real content, actionable controls, clear state feedback, and layouts across sizes.
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<title>Deep-sea cursor trail effect</title>
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<main class="page">
<header class="mast"><div><span class="eyebrow">dashboard / Pointer Trail Effects / INTERMEDIATE</span><h1>Deep-sea cursor trail effect</h1><p class="intro">Create a pointer trail effect in a deep-sea scene: includes real content, actionable controls, clear state feedback, and layouts across sizes.</p></div><span class="scenario">Deep Sea</span></header>
<div class="composition-index"><section class="demo" aria-label="Deep-sea pointer trail effect interaction area"><div class="workflow-dispatch"><aside class="dispatch-console"><span class="eyebrow">Deep Sea DISPATCH</span><h2>Submarine mission control</h2><form id="workflowDispatchForm"><label>Task Type<select id="workflowDispatchKind"><option>Sonar Scan</option><option>Hot Spring Sampling</option><option>Return Beacon</option></select></label><label>Subsea Depth<input id="workflowDispatchAmount" type="number" min="1" max="9999" value="45"><span>m</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">Dive in</button></form><label>Current task<select id="workflowDispatchActive" aria-label="Switch current task"><option value="1">Sonar Scan</option><option value="2">Hot Spring Sampling</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:creative-effects-cursor-trail --><div class="cursor-trail-lab" data-trail-layout="deep-current"><section class="trail-stage"><canvas id="trailCanvas" width="960" height="460" tabindex="0" aria-label="Deep Sea Pointer Trail Canvas; move the pointer or use the arrow keys to draw trails" aria-describedby="trailHelp">Your browser does not support Canvas.</canvas><div><span>Deep Sea</span><h2>The current undertow carries every trace of movement into the depths</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>Deep Sea Current Trail</h2><label>Light trail length <input id="trailLength" type="range" min="12" max="90" value="54" data-core-bridge="creative-effects-cursor-trail"><output id="trailLengthValue">54</output></label><label>Light Dot Size <input id="trailSize" type="range" min="3" max="18" value="9"><output id="trailSizeValue">9px</output></label><button id="trailClear" class="action" type="button">Clear light trail</button></aside></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>Deep Sea 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:creative-effects-cursor-trail */
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/* 11DZ_CORE_SCRIPT_END */
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const workflowDispatchCore=document.querySelector('#workflowCore');const workflowDispatchForm=document.querySelector('#workflowDispatchForm');const workflowDispatchSelect=document.querySelector('#workflowDispatchActive');const workflowDispatchJobs=new Map([["1",{"label":"Sonar Scan","amount":12,"priority":"normal","touches":0}],["2",{"label":"Hot Spring Sampling","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+' m · '+bridge.summary;announce('Dive mission current task:'+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+' m · '+workflowBridgeSummary();});workflowDispatchRender('1',false);
workflowBridgeReset();
</script>
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