Padrão de caleidoscópio do campo de aurora
Em um cenário de campo de aurora, conclua um padrão de caleidoscópio: inclua conteúdo real, controles acionáveis, feedback de status claro e um layout adaptável a diferentes tamanhos.
É possível editar, executar e salvar este exemplo após ativar JavaScript. O código-fonte fixo é o seguinte:
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<title>Padrão de caleidoscópio do campo de aurora</title>
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<header class="mast"><div><span class="eyebrow">art-deco / padrão de caleidoscópio / INTERMEDIATE</span><h1>Padrão de caleidoscópio do campo de aurora</h1><p class="intro">Em um cenário de campo de aurora, conclua um padrão de caleidoscópio: inclua conteúdo real, controles acionáveis, feedback de status claro e um layout adaptável a diferentes tamanhos.</p></div><span class="scenario">Campo Aurora</span></header>
<figure class="composition-gallery"><section class="demo" aria-label="Área interativa do padrão de caleidoscópio da aurora"><div class="workflow-compare"><form id="workflowCompareControls" class="compare-controls"><fieldset><legend>Canal de comparação</legend><label><input type="radio" name="workflowChannel" value="A" checked>A · cortina de luz verde</label><label><input type="radio" name="workflowChannel" value="B">B · faixa de luz magenta</label></fieldset><label>Peso do tempo de exposição<input id="workflowCompareWeight" type="range" min="10" max="90" value="50"><output id="workflowCompareWeightValue">50 s</output></label><label><input id="workflowCompareFreeze" type="checkbox">Congelar a versão atual</label><button id="workflowCompareCapture" class="action primary" type="button">Capturar e salvar a exposição</button><ol id="workflowCompareShelf" aria-label="Versão de amostra de registro"></ol></form><section class="compare-stage"><header><span class="eyebrow">Planície da aurora COMPARE</span><h2>Comparação em dois formatos do Aurora</h2><output id="workflowCompareLive">Versão A aguardando amostragem</output></header><section id="workflowCore" class="workflow-core compare-core" data-compare-channel="A" style="--compare-split:50%"><!-- 11DZ_CORE_START:creative-effects-kaleidoscope --><div class="kaleidoscope-lab"><canvas id="kaleidoscopeCanvas" width="720" height="720" tabindex="0" aria-label="Caleidoscópio interativo do campo de aurora; mova o ponteiro ou use as setas esquerda e direita para girar o padrão" aria-describedby="kaleidoscopeHelp">Este navegador não suporta Canvas.</canvas><aside class="kaleidoscope-controls panel"><span class="eyebrow">KALEIDOSCOPE</span><h2>Padrão de caleidoscópio</h2><p id="kaleidoscopeHelp" class="muted">Vários setores espelhados compartilham o mesmo conjunto de formas, criando uma simetria rígida. Mova o ponteiro para alterar o ângulo de rotação.</p><label>Setor espelhado <input id="kaleidoscopeSegments" type="range" min="4" max="16" step="2" value="10" data-core-bridge="creative-effects-kaleidoscope"><output id="kaleidoscopeSegmentsValue">10</output></label><label>Densidade gráfica <input id="kaleidoscopeDensity" type="range" min="3" max="12" value="7"><output id="kaleidoscopeDensityValue">7</output></label><button id="kaleidoscopeSpin" class="action" type="button" aria-pressed="false">Rotação automática</button></aside></div><!-- 11DZ_CORE_END --></section></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section><figcaption class="gallery-caption"><strong>Planície da aurora / GALLERY 03</strong></figcaption></figure>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:creative-effects-kaleidoscope */
const kaleidoscopeCanvas=document.querySelector('#kaleidoscopeCanvas');const kaleidoscopeContext=kaleidoscopeCanvas.getContext('2d');const kaleidoscopeSegments=document.querySelector('#kaleidoscopeSegments');const kaleidoscopeDensity=document.querySelector('#kaleidoscopeDensity');const kaleidoscopeReduced=matchMedia('(prefers-reduced-motion: reduce)').matches;let kaleidoscopeAngle=0;let kaleidoscopeSpinning=false;let kaleidoscopeFrame=0;function sizeKaleidoscope(){const rect=kaleidoscopeCanvas.getBoundingClientRect();const side=Math.max(300,Math.min(rect.width,rect.height||rect.width));const ratio=Math.min(2,devicePixelRatio||1);kaleidoscopeCanvas.width=Math.round(side*ratio);kaleidoscopeCanvas.height=Math.round(side*ratio);kaleidoscopeContext.setTransform(ratio,0,0,ratio,0,0);drawKaleidoscope();}function drawKaleidoscope(){const side=kaleidoscopeCanvas.width/Math.min(2,devicePixelRatio||1);const center=side/2;const segments=Number(kaleidoscopeSegments.value);const density=Number(kaleidoscopeDensity.value);kaleidoscopeContext.fillStyle='#100b24';kaleidoscopeContext.fillRect(0,0,side,side);for(let segment=0;segment<segments;segment+=1){for(let mirror=0;mirror<2;mirror+=1){kaleidoscopeContext.save();kaleidoscopeContext.translate(center,center);kaleidoscopeContext.rotate(kaleidoscopeAngle+segment*Math.PI*2/segments);kaleidoscopeContext.scale(1,mirror?-1:1);for(let index=0;index<density;index+=1){const radius=36+index*(center-54)/density;const size=8+(index*7)%24;kaleidoscopeContext.beginPath();kaleidoscopeContext.fillStyle=['#22d3ee','#f472b6','#fde047','#a78bfa'][index%4]+'bb';kaleidoscopeContext.arc(radius,Math.sin(index*1.7)*radius*.18,size,0,Math.PI*2);kaleidoscopeContext.fill();kaleidoscopeContext.rotate(.045);}kaleidoscopeContext.restore();}}if(kaleidoscopeSpinning&&!kaleidoscopeReduced){kaleidoscopeAngle+=.004;cancelAnimationFrame(kaleidoscopeFrame);kaleidoscopeFrame=requestAnimationFrame(drawKaleidoscope);}}kaleidoscopeCanvas.addEventListener('pointermove',event=>{const rect=kaleidoscopeCanvas.getBoundingClientRect();kaleidoscopeAngle=(event.clientX-rect.left)/rect.width*Math.PI*2;drawKaleidoscope();});kaleidoscopeCanvas.addEventListener('keydown',event=>{if(!['ArrowLeft','ArrowRight'].includes(event.key))return;event.preventDefault();kaleidoscopeAngle+=event.key==='ArrowRight'?.12:-.12;drawKaleidoscope();announce('O ângulo de rotação do caleidoscópio foi ajustado');});[kaleidoscopeSegments,kaleidoscopeDensity].forEach(input=>input.addEventListener('input',()=>{document.querySelector('#kaleidoscopeSegmentsValue').textContent=kaleidoscopeSegments.value;document.querySelector('#kaleidoscopeDensityValue').textContent=kaleidoscopeDensity.value;drawKaleidoscope();announce('Caleidoscópio '+kaleidoscopeSegments.value+' Um setor, densidade '+kaleidoscopeDensity.value);}));document.querySelector('#kaleidoscopeSpin').addEventListener('click',event=>{kaleidoscopeSpinning=!kaleidoscopeSpinning;event.currentTarget.textContent=kaleidoscopeSpinning?'Parar a rotação':'Rotação automática';event.currentTarget.setAttribute('aria-pressed',String(kaleidoscopeSpinning));cancelAnimationFrame(kaleidoscopeFrame);drawKaleidoscope();announce(kaleidoscopeSpinning?'O caleidoscópio começa a girar automaticamente':'O caleidoscópio parou de girar');});addEventListener('resize',sizeKaleidoscope,{passive:true});sizeKaleidoscope();
/* 11DZ_CORE_SCRIPT_END */
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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+' s';document.querySelector('#workflowCompareLive').textContent=workflowCompareState.channel+' Versão · '+workflowCompareState.weight+' s'+(workflowCompareState.frozen?' · Congelado':'');announce('O visualizador de contraste da aurora está ativo '+workflowCompareState.channel+' Versão');}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+' s · '+snapshot.bridge+'</small>';document.querySelector('#workflowCompareShelf').prepend(item);announce('amostrado '+snapshot.channel+' versão e salvar exposição · '+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('Amostra do botão'));workflowCompareCore.addEventListener('dblclick',()=>workflowCompareCapture('Vista principal com duplo clique'));workflowCompareDrive();
workflowBridgeReset();
</script>
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