Mini Apps and Mini Games

Class Checklist Station Random Picker

Complete a random picker for the classroom roster station scenario: includes real content, interactive controls, clear status feedback, and responsive layouts.

Mini Apps and Mini GamesRandom PickerHTMLCSSJavaScript
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  <main class="page">
    <header class="mast"><div><span class="eyebrow">playful / Random Picker / BEGINNER</span><h1>Class Checklist Station Random Picker</h1><p class="intro">Complete a random picker for the classroom roster station scenario: includes real content, interactive controls, clear status feedback, and responsive layouts.</p></div><span class="scenario">Classroom Sign-In Station</span></header>
    <div class="composition-index"><section class="demo" aria-label="Class Roster Station Random Picker Interaction Area"><section id="evidenceShell" class="evidence-shell" data-board-mode="scan"><header class="evidence-head"><div><span class="eyebrow">Class list station / EVIDENCE BOARD</span><h2>Random picker observation panel</h2><p>Place the main case into an evidence board, using separate observation cards, logs, and mode-switch records to track the current result.</p></div><div class="evidence-tools"><div class="row"><button class="action primary" type="button" data-board-mode="scan">Scan</button><button class="action" type="button" data-board-mode="proof">Verify</button><button class="action" type="button" data-board-mode="handoff">Handoff</button></div><output id="evidenceStatus">Awaiting Sampling</output></div></header><div class="evidence-body"><section class="evidence-stage"><div class="evidence-ribbon"><button type="button" data-evidence-card="0" aria-pressed="true"><span>01</span><strong>Class list station collection</strong><small>Check whether the status change is visible</small></button><button type="button" data-evidence-card="1" aria-pressed="false"><span>02</span><strong>Class List Station Overview</strong><small>Confirm keyboard and click entry points are consistent</small></button><button type="button" data-evidence-card="2" aria-pressed="false"><span>03</span><strong>Class Roster Station Plan</strong><small>Check whether the layout falls back on narrow screens</small></button><button type="button" data-evidence-card="3" aria-pressed="false"><span>04</span><strong>Classroom Checklist Station Inspiration</strong><small>Record current review conclusion</small></button></div><div id="evidenceCoreShell" class="evidence-core-shell"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">Class Checklist Station SESSION</span><h2>Class List Station 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 Recording Results</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="Class List Station 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:mini-apps-games-random-picker --><div class="mini picker"><span class="eyebrow">DAILY PICKER</span><h2>Class Roster Station Random Picker</h2><div id="pickerResult" class="metric">Ready to start</div><div class="row"><span class="chip">Class list station collection</span><span class="chip">Class List Station Overview</span><span class="chip">Class Roster Station Plan</span><span class="chip">Classroom Checklist Station Inspiration</span></div><button id="pickRandom" class="action primary" type="button" data-core-bridge="mini-apps-games-random-picker">Random Selection</button></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></div></section><aside class="evidence-rail"><label>Canvas Zoom<input id="evidenceZoom" type="range" min="88" max="128" value="100"><output id="evidenceZoomValue">100%</output></label><label>Current sample<select id="evidenceStep"><option value="0">Class list station collection</option><option value="1">Class List Station Overview</option><option value="2">Class Roster Station Plan</option><option value="3">Classroom Checklist Station Inspiration</option></select></label><ul id="evidenceChecklist" class="evidence-checklist"><li>Class list station collection</li><li>Class List Station Overview</li><li>Class Roster Station Plan</li><li>Classroom Checklist Station Inspiration</li></ul><button id="evidenceCapture" class="action primary" type="button">Write evidence</button><ol id="evidenceLog" class="evidence-log"><li>Evidence not yet entered</li></ol></aside></div></section><p id="status" class="status" role="status" aria-live="polite"></p></section><aside class="index-mark" aria-hidden="true"><strong>05</strong><span>Class List Station FIELD INDEX</span></aside></div>
  </main>
  <script>
    'use strict';
    const statusOutput = document.querySelector('#status');
    const announce = message => { statusOutput.textContent = message; };
    /* 11DZ_CORE_SCRIPT_START:mini-apps-games-random-picker */
const pickOptions=["Class list station collection","Class List Station Overview","Class Roster Station Plan","Classroom Checklist Station Inspiration"];function secureRandomIndex(length){if(globalThis.crypto?.getRandomValues){const values=new Uint32Array(1);crypto.getRandomValues(values);return values[0]%length;}return Math.floor(Math.random()*length);}document.querySelector('#pickRandom').addEventListener('click',()=>{const picked=pickOptions[secureRandomIndex(pickOptions.length)];document.querySelector('#pickerResult').textContent=picked;announce('Selection result:'+picked);});
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"mini-apps-games-random-picker","selector":"[data-core-bridge=\"mini-apps-games-random-picker\"]","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?'Class roster station round complete':'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('Class roster station 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();
const evidenceShell=document.querySelector('#evidenceShell');const evidenceStatus=document.querySelector('#evidenceStatus');const evidenceZoom=document.querySelector('#evidenceZoom');const evidenceZoomValue=document.querySelector('#evidenceZoomValue');const evidenceStep=document.querySelector('#evidenceStep');const evidenceChecklistItems=[...document.querySelectorAll('#evidenceChecklist li')];const evidenceCards=[...document.querySelectorAll('[data-evidence-card]')];const evidenceLog=document.querySelector('#evidenceLog');const evidenceModeButtons=[...evidenceShell.querySelectorAll('button[data-board-mode]')];const evidenceNotes=["Class list station collection","Class List Station Overview","Class Roster Station Plan","Classroom Checklist Station Inspiration"];const evidenceCore=document.querySelector('#workflowCore');let evidenceCaptures=0;function evidenceSetCard(index){evidenceCards.forEach((card,cardIndex)=>{const active=cardIndex===index;card.setAttribute('aria-pressed',String(active));});evidenceChecklistItems.forEach((item,itemIndex)=>{item.classList.toggle('is-active',itemIndex===index);item.classList.toggle('is-done',itemIndex<evidenceCaptures);});}function evidenceRender(reason){const version=evidenceCore?.dataset.workflowVersion||'0';const zoom=Number(evidenceZoom.value);const active=Math.min(evidenceNotes.length-1,Number(evidenceStep.value)||0);evidenceShell.style.setProperty('--evidence-zoom',String(zoom));evidenceZoomValue.textContent=zoom+'%';evidenceSetCard(active);evidenceStatus.textContent=reason+' · Core Version '+version;}evidenceModeButtons.forEach(button=>button.addEventListener('click',()=>{evidenceModeButtons.forEach(item=>item.classList.toggle('primary',item===button));evidenceShell.dataset.boardMode=button.dataset.boardMode;evidenceRender('Switched to'+button.textContent);announce('Evidence mode:'+button.textContent);}));evidenceCards.forEach((card,index)=>card.addEventListener('click',()=>{evidenceStep.value=String(index);evidenceRender('Switched to observation card');announce('Observation card:'+evidenceNotes[index]);}));evidenceZoom.addEventListener('input',()=>{evidenceRender('Canvas zoom updated');announce('Observe scaling '+evidenceZoom.value+'%');});evidenceStep.addEventListener('change',()=>{const index=Number(evidenceStep.value)||0;evidenceRender('Sampling switched');announce('Current sample:'+evidenceNotes[index]);});document.querySelector('#evidenceCapture').addEventListener('click',()=>{const index=Math.min(evidenceNotes.length-1,Number(evidenceStep.value)||0);const note=evidenceNotes[index];const version=evidenceCore?.dataset.workflowVersion||'0';evidenceCaptures+=1;const item=document.createElement('li');item.textContent='Evidence '+evidenceCaptures+' · '+note+' · Core Version '+version;const empty=evidenceLog.querySelector('li')?.textContent==='Evidence not yet entered';if(empty)evidenceLog.replaceChildren(item);else evidenceLog.prepend(item);while(evidenceLog.children.length>6)evidenceLog.lastElementChild.remove();evidenceRender('Evidence written '+evidenceCaptures);announce('Evidence written '+evidenceCaptures+' · '+note);});evidenceCore?.addEventListener('focusin',()=>evidenceRender('Main Case Gets Focus'));evidenceCore?.addEventListener('click',()=>evidenceRender('Primary example interaction'));evidenceRender('Awaiting Sampling');
  </script>
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