Local Events Expandable Records
Complete an expandable records component in a local events scenario: includes real content, interactive controls, clear status feedback, and responsive layouts.
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<title>Local Events Expandable Records</title>
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<main class="page">
<header class="mast"><div><span class="eyebrow">playful / expandable records / INTERMEDIATE</span><h1>Local Events Expandable Records</h1><p class="intro">Complete an expandable records component in a local events scenario: includes real content, interactive controls, clear status feedback, and responsive layouts.</p></div><span class="scenario">Local Events</span></header>
<div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>Master the semantic structure, responsive composition, keyboard interaction, and state synchronization of expandable records.</span></aside><section class="demo" aria-label="Interactive area for expandable local event records"><div class="workflow-compare"><form id="workflowCompareControls" class="compare-controls"><fieldset><legend>Reference Channel</legend><label><input type="radio" name="workflowChannel" value="A" checked>A · Parent-Child Activities</label><label><input type="radio" name="workflowChannel" value="B">B · Outdoor Activities</label></fieldset><label>Travel Distance Weight<input id="workflowCompareWeight" type="range" min="10" max="90" value="50"><output id="workflowCompareWeightValue">50 km</output></label><label><input id="workflowCompareFreeze" type="checkbox">Freeze current version</label><button id="workflowCompareCapture" class="action primary" type="button">Sample and Collect Events</button><ol id="workflowCompareShelf" aria-label="Version Sampling Record"></ol></form><section class="compare-stage"><header><span class="eyebrow">Local Events COMPARE</span><h2>Dual-Version Activity Comparison</h2><output id="workflowCompareLive">Version A waiting for sampling</output></header><section id="workflowCore" class="workflow-core compare-core" data-compare-channel="A" style="--compare-split:50%"><!-- 11DZ_CORE_START:cards-lists-content-expandable-records --><div class="records-demo"><header><span class="eyebrow">EXPANDABLE RECORDS</span><h2>Local Event Record</h2></header><div class="record-list"><article><button type="button" aria-expanded="false" aria-controls="recordDetails0" data-core-bridge="cards-lists-content-expandable-records"><span><b>Local event collaboration</b><small>Record 1 · Pending</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails0" hidden><dl><div><dt>Owner</dt><dd>Member 1</dd></div><div><dt>Updated at</dt><dd>07.08</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article><article><button type="button" aria-expanded="false" aria-controls="recordDetails1"><span><b>Local Activity Progress</b><small>Record 2 · Completed</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails1" hidden><dl><div><dt>Owner</dt><dd>Member 2</dd></div><div><dt>Updated at</dt><dd>07.09</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article><article><button type="button" aria-expanded="false" aria-controls="recordDetails2"><span><b>Local Event Reminders</b><small>Record 3 · To do</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails2" hidden><dl><div><dt>Owner</dt><dd>Member 3</dd></div><div><dt>Updated at</dt><dd>07.10</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article><article><button type="button" aria-expanded="false" aria-controls="recordDetails3"><span><b>Local events collection</b><small>Record 4 · Completed</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails3" hidden><dl><div><dt>Owner</dt><dd>Member 4</dd></div><div><dt>Updated at</dt><dd>07.11</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article><article><button type="button" aria-expanded="false" aria-controls="recordDetails4"><span><b>Local Events Overview</b><small>Record 5 · Pending</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails4" hidden><dl><div><dt>Owner</dt><dd>Member 5</dd></div><div><dt>Updated at</dt><dd>07.12</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article><article><button type="button" aria-expanded="false" aria-controls="recordDetails5"><span><b>Local event plan</b><small>Record 6 · Completed</small></span><i aria-hidden="true">⌄</i></button><div id="recordDetails5" hidden><dl><div><dt>Owner</dt><dd>Member 6</dd></div><div><dt>Updated at</dt><dd>07.13</dd></div></dl><p>Expanded to show the structured details for this record.</p></div></article></div></div><!-- 11DZ_CORE_END --></section></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:cards-lists-content-expandable-records */
document.querySelectorAll('.record-list article>button').forEach(button=>button.addEventListener('click',()=>{const open=button.getAttribute('aria-expanded')!=='true';button.setAttribute('aria-expanded',String(open));document.querySelector('#'+button.getAttribute('aria-controls')).hidden=!open;announce(button.querySelector('b').textContent+(open?'Details expanded':'Details collapsed'));}));
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"cards-lists-content-expandable-records","selector":"[data-core-bridge=\"cards-lists-content-expandable-records\"]","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 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+' kilometers';document.querySelector('#workflowCompareLive').textContent=workflowCompareState.channel+' Version · '+workflowCompareState.weight+' kilometers'+(workflowCompareState.frozen?' · Frozen':'');announce('Viewing activity comparison '+workflowCompareState.channel+' Version');}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+' km · '+snapshot.bridge+'</small>';document.querySelector('#workflowCompareShelf').prepend(item);announce('sampled '+snapshot.channel+' Version and bookmark activities · '+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('Button Sampling'));workflowCompareCore.addEventListener('dblclick',()=>workflowCompareCapture('Main view double-click'));workflowCompareDrive();
workflowBridgeReset();
</script>
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