Controles básicos e seletores

Incrementador numérico do canto de fitness

Complete um stepper numérico em um cenário de canto fitness: inclui conteúdo real, controles acionáveis, feedback de estado claro e layout em vários tamanhos.

Controles básicos e seletoresControlador numérico incrementalHTMLCSSJavaScript
É possível editar, executar e salvar este exemplo após ativar JavaScript. O código-fonte fixo é o seguinte:
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    <header class="mast"><div><span class="eyebrow">magazine / Stepper numérico / BEGINNER</span><h1>Incrementador numérico do canto de fitness</h1><p class="intro">Complete um stepper numérico em um cenário de canto fitness: inclui conteúdo real, controles acionáveis, feedback de estado claro e layout em vários tamanhos.</p></div><span class="scenario">Cantinho fitness</span></header>
    <figure class="composition-gallery"><section class="demo" aria-label="Área interativa do passo numérico do canto fitness"><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 · modo manual do canto fitness</label><label><input type="radio" name="workflowChannel" value="B">B · Modo inteligente do canto fitness</label></fieldset><label>Peso da carga do equipamento<input id="workflowCompareWeight" type="range" min="10" max="90" value="50"><output id="workflowCompareWeightValue">50 %</output></label><label><input id="workflowCompareFreeze" type="checkbox">Congelar a versão atual</label><button id="workflowCompareCapture" class="action primary" type="button">Amostragem e aplicação de cenários</button><ol id="workflowCompareShelf" aria-label="Versão de amostra de registro"></ol></form><section class="compare-stage"><header><span class="eyebrow">Academia COMPARE</span><h2>Comparação de duas versões do canto fitness</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:controls-selectors-numeric-stepper --><section class="stepper-studio"><header><div><span class="eyebrow">NUMBER STEPPER</span><h2>Balcão da esquina fitness</h2><p>Use botões para distribuir a quantidade e, ao mesmo tempo, dividir o resultado em três blocos de processamento.</p></div><output id="stepperCapacity">Restam 8 vagas</output></header><div class="stepper-board"><aside class="stepper-stage"><strong id="stepperValue">4</strong><p>Quantidade atual</p><label class="stepper-direct"><span>Inserir a quantidade diretamente</span><input id="stepperInput" type="number" min="1" max="12" step="1" value="4" inputmode="numeric"></label><div class="stepper-controls"><button id="stepperMinus" type="button" aria-label="reduzir uma vaga">−</button><button id="stepperPlus" type="button" aria-label="Adicionar uma vaga" data-core-bridge="controls-selectors-numeric-stepper">+</button></div><div class="stepper-shortcuts"><button type="button" data-stepper-value="2">2</button><button type="button" data-stepper-value="4">4</button><button type="button" data-stepper-value="8">8</button><button type="button" data-stepper-value="12">12</button></div></aside><section class="stepper-breakdown"><ol id="stepperSlots"><li><span>Área de preparação</span><strong id="stepperSlot0">0</strong><i><b id="stepperFill0"></b></i></li><li><span>Área de distribuição</span><strong id="stepperSlot1">0</strong><i><b id="stepperFill1"></b></i></li><li><span>Área de confirmação</span><strong id="stepperSlot2">0</strong><i><b id="stepperFill2"></b></i></li></ol><p id="stepperSummary">Área de preparo 2 unidades, área de distribuição 1 unidades, área de confirmação 1 unidades.</p></section></div></section><!-- 11DZ_CORE_END --></section></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section><figcaption class="gallery-caption"><strong>Canto Fitness / GALLERY 03</strong></figcaption></figure>
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const stepperValue=document.querySelector('#stepperValue');const stepperInput=document.querySelector('#stepperInput');const stepperCapacity=document.querySelector('#stepperCapacity');const stepperSummary=document.querySelector('#stepperSummary');const stepperShortcuts=[...document.querySelectorAll('[data-stepper-value]')];function splitStepper(value){const head=Math.ceil(value/2);const tail=value-head;const middle=Math.ceil(tail/2);return [head,middle,Math.max(0,value-head-middle)];}function renderStepper(next){const value=Math.min(12,Math.max(1,Number(next)||1));const slots=splitStepper(value);stepperValue.textContent=String(value);stepperInput.value=String(value);stepperCapacity.textContent='restante '+(12-value)+' vagas';document.querySelector('#stepperMinus').disabled=value===1;document.querySelector('#stepperPlus').disabled=value===12;slots.forEach((count,index)=>{document.querySelector('#stepperSlot'+index).textContent=String(count);document.querySelector('#stepperFill'+index).style.width=Math.round(count/Math.max(1,value)*100)+'%';});stepperSummary.textContent='Área de preparação '+slots[0]+' unidades, área de distribuição '+slots[1]+' unid., área de confirmação '+slots[2]+' unid.';stepperShortcuts.forEach(button=>button.setAttribute('aria-pressed',String(Number(button.dataset.stepperValue)===value)));announce('Quantidade atual '+value);}document.querySelector('#stepperMinus').addEventListener('click',()=>renderStepper(Number(stepperInput.value)-1));document.querySelector('#stepperPlus').addEventListener('click',()=>renderStepper(Number(stepperInput.value)+1));stepperInput.addEventListener('input',()=>renderStepper(stepperInput.value));stepperShortcuts.forEach(button=>button.addEventListener('click',()=>renderStepper(button.dataset.stepperValue)));renderStepper(4);
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