Forms and input

Event Booking Budget Sheet

Complete a budget planning sheet in an event booking scenario: includes realistic content, actionable controls, clear status feedback, and responsive layouts.

Forms and inputBudget allocation sheetHTMLCSSJavaScript
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  <main class="page">
    <header class="mast"><div><span class="eyebrow">art-deco / Budget Configuration Sheet / BEGINNER</span><h1>Event Booking Budget Sheet</h1><p class="intro">Complete a budget planning sheet in an event booking scenario: includes realistic content, actionable controls, clear status feedback, and responsive layouts.</p></div><span class="scenario">Event Booking</span></header>
    <div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>Master the semantic structure, responsive layout, keyboard operation, and state synchronization of the budget configuration table.</span></aside><section class="demo" aria-label="Activity Booking Budget Configuration Interaction Area"><div class="workflow-guide"><nav class="guide-rail" aria-label="Event seating guide"><span class="eyebrow">Event Booking GUIDE</span><ol><li data-workflow-guide-step="0" aria-current="step"><b>1</b><span>Single registration</span></li><li data-workflow-guide-step="1"><b>2</b><span>Peer Registration</span></li><li data-workflow-guide-step="2"><b>3</b><span>Volunteer Collaboration</span></li></ol><div class="guide-actions"><button id="workflowGuideBack" class="action" type="button" disabled>Previous</button><button id="workflowGuideNext" class="action primary" type="button">Complete this step</button></div><div id="workflowGuideProgress" role="progressbar" aria-label="Event seat completion" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div></nav><section id="workflowCore" class="workflow-core guide-core" data-guide-step="0" aria-describedby="workflowGuideInstruction"><p id="workflowGuideInstruction">Please complete the “single-person signup” related actions in the main example.</p><!-- 11DZ_CORE_START:forms-input-budget-builder --><div class="budget-builder panel"><header><span class="eyebrow">BUDGET BUILDER</span><h2>Event Booking Budget</h2></header><div class="budget-lines"><label><span>Venue</span><input data-budget-line type="number" min="0" step="10" value="80" data-core-bridge="forms-input-budget-builder"><output>¥80</output></label><label><span>Materials</span><input data-budget-line type="number" min="0" step="10" value="115"><output>¥115</output></label><label><span>Transportation</span><input data-budget-line type="number" min="0" step="10" value="150"><output>¥150</output></label><label><span>Catering</span><input data-budget-line type="number" min="0" step="10" value="185"><output>¥185</output></label></div><label class="budget-limit">Budget cap <input id="budgetLimit" type="number" min="0" value="700"></label><aside><span>Current total</span><strong id="budgetTotal" class="metric">¥0</strong><p id="budgetBalance"></p></aside></div><!-- 11DZ_CORE_END --></section><aside class="guide-evidence"><details id="workflowGuideDetails"><summary>View acceptance requirements</summary><ul><li>A single-person registration requires one visible state change</li><li>Same-day registration requires a visible state change at once</li><li>Volunteer coordination requires a visible state change</li></ul></details><form id="workflowGuideEvidenceForm"><label>This step evidence<textarea id="workflowGuideEvidence" rows="3" placeholder="Record the observed state"></textarea></label><input class="action" type="submit" value="Save evidence"></form><output id="workflowGuideSummary">0 / 3 Steps Complete</output></aside></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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    /* 11DZ_CORE_SCRIPT_START:forms-input-budget-builder */
const budgetInputs=[...document.querySelectorAll('[data-budget-line]')];function renderBudget(){let total=0;budgetInputs.forEach(input=>{const value=Math.max(0,Number(input.value)||0);total+=value;input.nextElementSibling.textContent='¥'+value;});const limit=Math.max(0,Number(document.querySelector('#budgetLimit').value)||0);const balance=limit-total;document.querySelector('#budgetTotal').textContent='¥'+total;document.querySelector('#budgetBalance').textContent=balance>=0?'Still available to allocate ¥'+balance:'Over budget ¥'+Math.abs(balance);announce('Total Budget '+total+' yuan');}budgetInputs.forEach(input=>input.addEventListener('input',renderBudget));document.querySelector('#budgetLimit').addEventListener('input',renderBudget);renderBudget();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"forms-input-budget-builder","selector":"[data-core-bridge=\"forms-input-budget-builder\"]","mode":"number","key":"ArrowUp"};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 workflowGuideCore=document.querySelector('#workflowCore');const workflowGuideStages=["Single registration","Peer Registration","Volunteer Collaboration"];const workflowGuideState={step:0,completed:new Set(),evidence:new Map(),consumedVersion:0};function workflowGuideDrive(){const step=workflowGuideState.step;workflowGuideCore.dataset.guideStep=String(step);document.querySelector('#workflowGuideInstruction').textContent='Please complete the main example ‘'+workflowGuideStages[step]+'Related actions.”';document.querySelectorAll('[data-workflow-guide-step]').forEach((item,index)=>{item.classList.toggle('is-complete',workflowGuideState.completed.has(index));if(index===step)item.setAttribute('aria-current','step');else item.removeAttribute('aria-current');});document.querySelector('#workflowGuideBack').disabled=step===0;document.querySelector('#workflowGuideNext').textContent=step===workflowGuideStages.length-1?'Reserve a seat':'Complete this step';const percent=Math.round(workflowGuideState.completed.size/workflowGuideStages.length*100);const progress=document.querySelector('#workflowGuideProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';document.querySelector('#workflowGuideSummary').textContent=workflowGuideState.completed.size+' / '+workflowGuideStages.length+' Step complete · '+workflowBridgeSummary();announce('Current step of the event seats:'+workflowGuideStages[step]);}function workflowGuideAdvance(direction){if(direction>0){const bridge=workflowBridgeActivate();const version=Number(workflowGuideCore.dataset.workflowVersion||0);if(version<=workflowGuideState.consumedVersion){announce('Please complete the visible state change in the main example first');return;}workflowGuideState.consumedVersion=version;workflowGuideState.completed.add(workflowGuideState.step);announce('Main case changes recorded · '+bridge.summary);}workflowGuideState.step=Math.max(0,Math.min(workflowGuideStages.length-1,workflowGuideState.step+direction));workflowGuideDrive();}document.querySelector('#workflowGuideBack').addEventListener('click',()=>workflowGuideAdvance(-1));document.querySelector('#workflowGuideNext').addEventListener('click',()=>workflowGuideAdvance(1));document.querySelector('#workflowGuideEvidenceForm').addEventListener('submit',event=>{event.preventDefault();const version=Number(workflowGuideCore.dataset.workflowVersion||0);if(version<=workflowGuideState.consumedVersion){announce('Evidence not saved: the main example has no new changes yet');return;}const text=document.querySelector('#workflowGuideEvidence').value.trim();workflowGuideState.evidence.set(workflowGuideState.step,text||'Visible status check completed');workflowGuideState.completed.add(workflowGuideState.step);workflowGuideState.consumedVersion=version;workflowGuideDrive();announce('Evidence for this step has been saved · '+workflowBridgeSummary());});document.querySelector('#workflowGuideDetails').addEventListener('toggle',event=>announce(event.currentTarget.open?'Acceptance requirements expanded':'Acceptance requirements collapsed'));workflowGuideDrive();
workflowBridgeReset();
  </script>
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