Deep-sea starfield traversal effect
A starfield travel effect completed in a deep-sea setting: includes realistic content, interactive controls, clear status feedback, and responsive layouts across sizes.
With JavaScript enabled, you can edit, run, and save this example. The fixed source is as follows:
<!doctype html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Deep-sea starfield traversal effect</title>
<style>
:root { --ink:#24213a; --paper:#f6f1e8; --accent:#e6a23c; --secondary:#a8a1d8; --line:color-mix(in srgb, var(--ink) 18%, transparent); --shadow:0 24px 60px color-mix(in srgb, var(--ink) 16%, transparent); color-scheme:light; }
* { box-sizing:border-box; }
html { min-width:320px; background:var(--paper); }
body { min-height:100vh; margin:0; overflow-x:hidden; color:var(--ink); font-family:"DIN Alternate","Arial Narrow",sans-serif; background:repeating-linear-gradient(135deg,color-mix(in srgb,var(--ink) 5%,transparent) 0 1px,transparent 1px 18px),var(--paper); }
button,input,select,textarea { color:inherit; font:inherit; }
button,[role="button"],input,select,textarea { accent-color:var(--accent); }
button { cursor:pointer; }
button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible { outline:3px solid var(--accent); outline-offset:3px; }
[hidden] { display:none !important; }
@media (max-width:700px) { .mast h1 { line-height:1.08 !important; letter-spacing:-.035em !important; overflow-wrap:anywhere; } }
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto !important; animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; } }
.mast{display:flex;justify-content:space-between;border-bottom:6px solid var(--ink);padding-bottom:18px;gap:20px;align-items:flex-end;margin:0 0 22px}.page{width:min(1240px,calc(100% - 28px));margin:auto;padding:34px 0 70px}.scenario{padding:8px 12px;border:2px solid var(--ink);font:900 12px/1 ui-monospace,monospace}.mast h1{font-family:"DIN Condensed","Arial Narrow",sans-serif;font-weight:900;text-transform:uppercase;font-size:clamp(44px,10vw,104px);letter-spacing:-.02em;max-width:1000px;margin:0;line-height:.82}.intro{max-width:720px;font-family:"Arial Narrow",sans-serif;line-height:1.5}.eyebrow{display:inline-block;padding:6px 9px;color:var(--paper);background:var(--accent);font:900 10px/1 ui-monospace,monospace;letter-spacing:.12em}.demo{border-radius:3px;box-shadow:10px 10px 0 var(--accent);position:relative;min-height:400px;overflow:hidden;padding:32px;background:var(--paper)}@media(max-width:700px){.mast{display:grid;grid-template-columns:1fr}.page{width:calc(100% - 16px);padding-top:16px}.demo{padding:14px}}
.panel{padding:30px;border:0;border-radius:42px 12px;background:color-mix(in srgb,var(--secondary) 18%,var(--paper))}.row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.stack{display:flex;flex-direction:column;gap:20px}.action{min-height:48px;padding:12px 22px;border:0;border-radius:50% 50% 18px 18px;background:color-mix(in srgb,var(--secondary) 42%,transparent);font-weight:800}.action.primary,.action.is-active{color:var(--paper);background:var(--accent)}.muted{color:color-mix(in srgb,var(--ink) 64%,transparent);line-height:1.7}.status{min-height:25px;margin-top:16px;color:var(--accent)}.metric{font-size:clamp(32px,7vw,66px);font-weight:800}.meter{height:11px;border-radius:50%;background:color-mix(in srgb,var(--ink) 10%,transparent)}.meter>i{display:block;height:100%;border-radius:inherit;background:var(--accent)}.chip{padding:8px 12px;border-radius:50%;background:var(--paper)}
.composition-split{display:grid;grid-template-columns:150px minmax(0,1fr);gap:18px;align-items:start}.split-note{position:sticky;top:20px;display:grid;gap:14px;padding:18px 12px;border-block:3px double var(--accent);font-size:13px;line-height:1.65}.split-note b{font:900 12px/1 ui-monospace,monospace;letter-spacing:.12em}.split-note span{writing-mode:vertical-rl;min-height:120px;color:color-mix(in srgb,var(--ink) 60%,transparent)}.composition-split .demo{min-width:0}@media(max-width:900px){.composition-split{grid-template-columns:1fr}.split-note{position:static;grid-template-columns:auto 1fr}.split-note span{writing-mode:horizontal-tb;min-height:0}}
.starfield-lab{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,.6fr);gap:16px}.starfield-lab canvas{width:100%;height:460px;border:1px solid var(--line);border-radius:24px;background:#02040a}.star-controls{display:grid;align-content:center;gap:17px}.star-controls label{display:grid;grid-template-columns:1fr auto;gap:8px;font-weight:800}.star-controls input{grid-column:1/-1}@media(max-width:740px){.starfield-lab{grid-template-columns:1fr}.starfield-lab canvas{height:330px}}.workflow-dispatch{display:grid;grid-template-columns:minmax(210px,.48fr) minmax(0,1.52fr);gap:18px}.dispatch-console{display:grid;align-content:start;gap:16px;padding:22px;border:1px solid var(--line);border-radius:18px;background:color-mix(in srgb,var(--secondary) 12%,var(--paper))}.dispatch-console h2{margin:.2em 0}.dispatch-console form,.dispatch-console label{display:grid;gap:7px}.dispatch-console input,.dispatch-console select{min-width:0;width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}.dispatch-console fieldset{display:flex;gap:12px;border:1px solid var(--line);border-radius:10px}.dispatch-console fieldset label{display:flex;align-items:center}.dispatch-workbench{--dispatch-load:.22;min-width:0;padding:14px;border-left:8px solid color-mix(in srgb,var(--accent) calc(var(--dispatch-load)*100%),var(--line));background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 8%,transparent),transparent 28%)}.dispatch-workbench[data-dispatch-priority="urgent"]{box-shadow:inset 0 0 0 2px var(--accent)}@media(max-width:900px){.workflow-dispatch{grid-template-columns:1fr}.dispatch-console{order:2}}
</style>
</head>
<body data-aesthetic="industrial" data-composition="split-note">
<main class="page">
<header class="mast"><div><span class="eyebrow">industrial / Starfield traversal effect / INTERMEDIATE</span><h1>Deep-sea starfield traversal effect</h1><p class="intro">A starfield travel effect completed in a deep-sea setting: includes realistic content, interactive controls, clear status feedback, and responsive layouts across sizes.</p></div><span class="scenario">Deep Sea</span></header>
<div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>Master the semantic structure, responsive arrangement, keyboard operation, and state synchronization of the starfield travel effect.</span></aside><section class="demo" aria-label="Deep-sea starfield traversal 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="33"><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-starfield --><div class="starfield-lab"><canvas id="starCanvas" width="960" height="480" aria-label="Deep-Sea Starfield Traversal Animation" aria-describedby="starHelp">Your browser does not support Canvas.</canvas><aside class="star-controls panel"><span class="eyebrow">STARFIELD</span><h2>Starfield traversal effect</h2><p id="starHelp" class="muted">The stars move outward from the center of the screen, with size and brightness conveying depth and distance.</p><label>shuttle speed <input id="starSpeed" type="range" min="1" max="12" value="5" data-core-bridge="creative-effects-starfield"><output id="starSpeedValue">5</output></label><label>Star Count <input id="starAmount" type="range" min="40" max="180" value="110"><output id="starAmountValue">110</output></label><div class="row"><button id="starReset" class="action primary" type="button">Reset course</button><button id="starPause" class="action" type="button" aria-pressed="false">Pause</button></div></aside></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:creative-effects-starfield */
const starCanvas=document.querySelector('#starCanvas');const starContext=starCanvas.getContext('2d');const starSpeed=document.querySelector('#starSpeed');const starAmount=document.querySelector('#starAmount');const starReduced=matchMedia('(prefers-reduced-motion: reduce)').matches;let stars=[];let starPaused=starReduced;let starFrame=0;function sizeStarCanvas(){const rect=starCanvas.getBoundingClientRect();const ratio=Math.min(2,devicePixelRatio||1);starCanvas.width=Math.max(320,Math.round(rect.width*ratio));starCanvas.height=Math.max(260,Math.round(rect.height*ratio));starContext.setTransform(ratio,0,0,ratio,0,0);}function createStars(){cancelAnimationFrame(starFrame);const rect=starCanvas.getBoundingClientRect();stars=Array.from({length:Number(starAmount.value)},(_,index)=>({x:((index*73)%997)/997*rect.width-rect.width/2,y:((index*151)%991)/991*rect.height-rect.height/2,z:40+(index*61)%900,pz:900}));document.querySelector('#starAmountValue').textContent=starAmount.value;announce('Starfield generated '+stars.length+' stars');}function drawStars(){const rect=starCanvas.getBoundingClientRect();const centerX=rect.width/2;const centerY=rect.height/2;starContext.fillStyle='#02040a';starContext.fillRect(0,0,rect.width,rect.height);stars.forEach((star,index)=>{star.pz=star.z;if(!starPaused)star.z-=Number(starSpeed.value);if(star.z<8){star.z=900;star.pz=900;}const x=centerX+star.x/star.z*280;const y=centerY+star.y/star.z*280;const previousX=centerX+star.x/star.pz*280;const previousY=centerY+star.y/star.pz*280;const radius=Math.max(.5,(1-star.z/900)*3.4);starContext.beginPath();starContext.strokeStyle=index%5?'rgba(255,255,255,.84)':'rgba(125,211,252,.94)';starContext.lineWidth=radius;starContext.moveTo(previousX,previousY);starContext.lineTo(x,y);starContext.stroke();});if(!starPaused)starFrame=requestAnimationFrame(drawStars);}starSpeed.addEventListener('input',()=>{document.querySelector('#starSpeedValue').textContent=starSpeed.value;announce('shuttle speed '+starSpeed.value);});starAmount.addEventListener('input',()=>{createStars();drawStars();});document.querySelector('#starReset').addEventListener('click',()=>{createStars();drawStars();});document.querySelector('#starPause').addEventListener('click',event=>{starPaused=!starPaused;event.currentTarget.textContent=starPaused?'Continue':'Pause';event.currentTarget.setAttribute('aria-pressed',String(starPaused));cancelAnimationFrame(starFrame);drawStars();announce(starPaused?'Starfield traversal paused':'Continue Starfield Journey');});addEventListener('resize',()=>{sizeStarCanvas();createStars();drawStars();},{passive:true});sizeStarCanvas();createStars();drawStars();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"creative-effects-starfield","selector":"[data-core-bridge=\"creative-effects-starfield\"]","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":"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>
</body>
</html>