Audio recorder media query observer
Complete the media query observer in an audio recorder scenario: include real content, interactive controls, clear status feedback, and layouts that adapt across sizes.
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<header class="mast"><div><span class="eyebrow">industrial / Media Query Observer / BEGINNER</span><h1>Audio recorder media query observer</h1><p class="intro">Complete the media query observer in an audio recorder scenario: include real content, interactive controls, clear status feedback, and layouts that adapt across sizes.</p></div><span class="scenario">Audio Recorder</span></header>
<figure class="composition-gallery"><section class="demo" aria-label="Audio recorder media query observer interactive area"><div class="workflow-guide"><nav class="guide-rail" aria-label="Audio recorder guide"><span class="eyebrow">Audio recorder GUIDE</span><ol><li data-workflow-guide-step="0" aria-current="step"><b>1</b><span>Audio Recorder Permission Check</span></li><li data-workflow-guide-step="1"><b>2</b><span>Audio Recorder Capability Log</span></li><li data-workflow-guide-step="2"><b>3</b><span>Audio recorder local save</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="Audio Recorder 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 tasks related to “Audio Recorder Permission Check” in the main example.</p><!-- 11DZ_CORE_START:browser-media-device-media-query --><div class="query-observatory"><header><span class="eyebrow">MEDIA QUERY MATRIX</span><h2>Audio Recorder Environment Query Console</h2><p>Select the conditions to observe; browser changes will update the indicator lights immediately.</p></header><fieldset id="queryFilters"><legend>Viewing Conditions</legend><label><input type="checkbox" value="0" checked data-core-bridge="browser-media-device-media-query"><span>Narrow Screen</span><code>(max-width: 600px)</code><i aria-hidden="true"></i></label><label><input type="checkbox" value="1" checked><span>Portrait</span><code>(orientation: portrait)</code><i aria-hidden="true"></i></label><label><input type="checkbox" value="2" checked><span>Reduce Motion</span><code>(prefers-reduced-motion: reduce)</code><i aria-hidden="true"></i></label><label><input type="checkbox" value="3" checked><span>High Contrast</span><code>(prefers-contrast: more)</code><i aria-hidden="true"></i></label></fieldset><section class="query-preview"><div id="queryShape" aria-hidden="true"></div><output id="querySummary" role="status">Waiting for calculation</output><ul id="queryMatches"></ul><button id="queryReset" class="action" type="button">Observe all</button></section></div><!-- 11DZ_CORE_END --></section><aside class="guide-evidence"><details id="workflowGuideDetails"><summary>View acceptance requirements</summary><ul><li>The audio recorder permission check requires one visible state change</li><li>The audio recorder capability log needs a visible state change</li><li>Audio recorder local saving requires a one-time visibility 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><figcaption class="gallery-caption"><strong>Audio Recorder / GALLERY 03</strong></figcaption></figure>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:browser-media-device-media-query */
const queryDefinitions=[["Narrow Screen","(max-width: 600px)"],["Portrait","(orientation: portrait)"],["Reduce Motion","(prefers-reduced-motion: reduce)"],["High Contrast","(prefers-contrast: more)"]];const queryRows=[...document.querySelectorAll('#queryFilters label')];const queryInputs=[...document.querySelectorAll('#queryFilters input')];const queryLists=queryDefinitions.map(entry=>matchMedia(entry[1]));function renderQueries(){const enabled=new Set(queryInputs.filter(input=>input.checked).map(input=>Number(input.value)));const matched=[];queryRows.forEach((row,index)=>{const active=enabled.has(index)&&queryLists[index].matches;row.classList.toggle('is-match',active);row.hidden=!enabled.has(index);if(active)matched.push(queryDefinitions[index][0]);});document.querySelector('#querySummary').textContent=matched.length+' Environment condition matched';document.querySelector('#queryMatches').replaceChildren(...matched.map(label=>{const item=document.createElement('li');item.textContent=label;return item;}));document.querySelector('#queryShape').style.transform='scale('+(1-Math.min(.24,matched.length*.05))+')';}queryInputs.forEach(input=>input.addEventListener('change',renderQueries));queryLists.forEach(query=>query.addEventListener?.('change',renderQueries));document.querySelector('#queryReset').addEventListener('click',()=>{queryInputs.forEach(input=>{input.checked=true;});queryRows.forEach(row=>{row.hidden=false;});renderQueries();announce('All media queries restored');});renderQueries();
/* 11DZ_CORE_SCRIPT_END */
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const workflowGuideCore=document.querySelector('#workflowCore');const workflowGuideStages=["Audio Recorder Permission Check","Audio Recorder Capability Log","Audio recorder local save"];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?'Recording capability':'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('Audio Recorder Current Step:'+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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