Bike Rental Cart Calculator
Complete a shopping cart calculator in a bike rental scenario: includes real content, interactive controls, clear state feedback, and responsive layouts.
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<title>Bike Rental Cart Calculator</title>
<style>
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<main class="page">
<header class="mast"><div><span class="eyebrow">minimal / Cart Calculator / INTERMEDIATE</span><h1>Bike Rental Cart Calculator</h1><p class="intro">Complete a shopping cart calculator in a bike rental scenario: includes real content, interactive controls, clear state feedback, and responsive layouts.</p></div><span class="scenario">Bike rental</span></header>
<div class="composition-deck"><div class="deck-bar"><span>CONTROL DECK · 04</span><span>Shopping Cart Calculator</span><span class="deck-lights" aria-hidden="true"><i></i><i></i><i></i></span></div><section class="demo" aria-label="Bike Rental Shopping Cart Calculator Interaction Area"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">Bike Rental SESSION</span><h2>Rental time slot timer</h2></div><output id="workflowSessionClock">00:45</output><label>Round Duration<input id="workflowSessionLength" type="range" min="15" max="90" step="15" value="45"><span>sec</span></label><button id="workflowSessionToggle" class="action primary" type="button">Start rental</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="Rental period progress" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div><section id="workflowCore" class="workflow-core session-stage" data-session-phase="ready" tabindex="-1"><!-- 11DZ_CORE_START:commerce-service-flows-shopping-cart --><div class="cart"><section class="cart-items panel"><span class="eyebrow">Order Configuration</span><h2>Shopping Cart Calculator</h2><article data-product data-price="28"><div><b>Bike Rental Favorites</b><small>¥28 / item</small></div><div class="quantity"><button type="button" aria-label="Reduce bike rental favorites" data-delta="-1" data-core-bridge="commerce-service-flows-shopping-cart">−</button><output>1</output><button type="button" aria-label="Add bike rental to favorites" data-delta="1">＋</button></div></article><article data-product data-price="45"><div><b>Bike Rental Overview</b><small>¥45 / item</small></div><div class="quantity"><button type="button" aria-label="Bike rental overview reduction" data-delta="-1">−</button><output>0</output><button type="button" aria-label="Add bike rental overview" data-delta="1">＋</button></div></article><article data-product data-price="62"><div><b>Bike rental plan</b><small>¥62 / item</small></div><div class="quantity"><button type="button" aria-label="Reduce bike rental plan" data-delta="-1">−</button><output>0</output><button type="button" aria-label="Add bike rental plan" data-delta="1">＋</button></div></article></section><aside class="receipt panel"><span>Estimated total</span><strong id="cartTotal" class="metric">¥0</strong><label>Promo code <input id="promoCode" autocomplete="off" placeholder="Enter SAVE10"></label><button id="applyPromo" class="action" type="button">Apply discount</button><button id="checkout" class="action primary" type="button">Confirm plan</button><small>This example does not send order or payment information.</small></aside></div><!-- 11DZ_CORE_END --></section><footer class="session-log"><strong id="workflowSessionScore">0 interaction checkpoints</strong><ol id="workflowSessionLaps" aria-label="Round Log"></ol></footer></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:commerce-service-flows-shopping-cart */
let discount = 0; const productRows = [...document.querySelectorAll('[data-product]')]; function renderTotal(){ const total = productRows.reduce((sum,row) => sum + Number(row.dataset.price) * Number(row.querySelector('output').textContent),0); const finalTotal = Math.round(total * (1 - discount)); document.querySelector('#cartTotal').textContent = '¥' + finalTotal; announce('Current total ' + finalTotal + ' yuan'); }
productRows.forEach(row => row.querySelectorAll('[data-delta]').forEach(button => button.addEventListener('click',() => { const output = row.querySelector('output'); output.textContent = Math.max(0,Number(output.textContent) + Number(button.dataset.delta)); renderTotal(); }))); document.querySelector('#applyPromo').addEventListener('click',() => { discount = document.querySelector('#promoCode').value.trim().toUpperCase() === 'SAVE10' ? .1 : 0; announce(discount ? 'Promo code applied' : 'Promo code invalid'); renderTotal(); }); document.querySelector('#checkout').addEventListener('click',() => announce('The bike rental plan has been confirmed locally')); renderTotal();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"commerce-service-flows-shopping-cart","selector":"[data-core-bridge=\"commerce-service-flows-shopping-cart\"]","mode":"click","key":"Enter"};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("click",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();workflowBridgeControl.click();const result=workflowBridgeCommit();setTimeout(workflowBridgeCommit,0);return result;}function workflowBridgeReset(){workflowBridgeCore.dataset.workflowVersion='0';workflowBridgeLastEffect=workflowBridgeSerialize();}
const workflowSessionCore=document.querySelector('#workflowCore');const workflowSessionToggle=document.querySelector('#workflowSessionToggle');const workflowSessionLength=document.querySelector('#workflowSessionLength');const workflowSessionState={phase:'ready',elapsed:0,limit:Number(workflowSessionLength.value),checkpoints:[],timer:null};function workflowSessionFormat(seconds){return String(Math.floor(seconds/60)).padStart(2,'0')+':'+String(seconds%60).padStart(2,'0');}function workflowSessionDrive(){const percent=Math.min(100,Math.round(workflowSessionState.elapsed/workflowSessionState.limit*100));document.querySelector('#workflowSessionClock').textContent=workflowSessionFormat(Math.max(0,workflowSessionState.limit-workflowSessionState.elapsed));const progress=document.querySelector('#workflowSessionProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';workflowSessionCore.dataset.sessionPhase=workflowSessionState.phase;document.querySelector('#workflowSessionScore').textContent=workflowSessionState.checkpoints.length+' interactive checkpoints';}function workflowSessionLap(label){workflowSessionState.checkpoints.push({label,at:workflowSessionState.elapsed});const item=document.createElement('li');item.textContent=label+' · '+workflowSessionFormat(workflowSessionState.elapsed);document.querySelector('#workflowSessionLaps').append(item);workflowSessionDrive();}function workflowSessionStop(complete=false){clearInterval(workflowSessionState.timer);workflowSessionState.timer=null;workflowSessionState.phase=complete?'complete':'paused';workflowSessionToggle.textContent=complete?'Restart':'Continue round';workflowSessionToggle.setAttribute('aria-pressed','false');workflowSessionDrive();announce(complete?'Rental period round completed':'Round paused');}function workflowSessionStart(){if(workflowSessionState.phase==='complete'){workflowSessionState.elapsed=0;workflowSessionState.checkpoints=[];document.querySelector('#workflowSessionLaps').replaceChildren();}workflowSessionState.phase='running';workflowSessionToggle.textContent='Pause round';workflowSessionToggle.setAttribute('aria-pressed','true');const bridge=workflowBridgeActivate();workflowSessionLap(bridge.summary);clearInterval(workflowSessionState.timer);workflowSessionState.timer=setInterval(()=>{workflowSessionState.elapsed+=1;if(workflowSessionState.elapsed>=workflowSessionState.limit){workflowSessionStop(true);return;}workflowSessionDrive();},1000);workflowSessionDrive();announce('Rental period round has started · '+bridge.summary);}workflowSessionToggle.addEventListener('click',()=>workflowSessionState.phase==='running'?workflowSessionStop():workflowSessionStart());workflowSessionLength.addEventListener('input',()=>{workflowSessionState.limit=Number(workflowSessionLength.value);workflowSessionState.elapsed=Math.min(workflowSessionState.elapsed,workflowSessionState.limit);workflowSessionDrive();});workflowSessionCore.addEventListener('keydown',event=>{if(event.key==='Enter'||event.key===' '){workflowSessionLap('Keyboard Interaction');}});workflowSessionCore.addEventListener('click',event=>{if(event.target.closest('[data-core-bridge]'))workflowSessionLap('Core action · '+workflowBridgeSummary());});document.addEventListener('visibilitychange',()=>{if(document.hidden&&workflowSessionState.phase==='running')workflowSessionStop();});workflowSessionDrive();
workflowBridgeReset();
</script>
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