{"$schema":"https://ui.shadcn.com/schema/registry-item.json","name":"class-timetable","type":"registry:component","title":"Class Timetable","description":"Arrange recurring classes by weekday and start time.","author":"Notion Arena","categories":["docs"],"tags":["widget","free","school","class schedule","timetable","student","weekly"],"meta":{"kind":"widget","tier":"free","version":"1.0.0","updatedAt":"2026-10-11","notionPlan":"Free","emoji":"🏫","delivery":["embed","html-block","download"],"capabilities":{"interactive":true,"offlineSafe":true,"persistsLocally":true,"writesToNotion":false,"needsNetwork":false},"embedUrl":"https://notionarena.vercel.app/embed/class-timetable","fileUrl":"https://notionarena.vercel.app/widgets/class-timetable.html","downloadUrl":"https://notionarena.vercel.app/api/widget/class-timetable","height":380,"minHeight":270,"maxHeight":520,"params":[{"key":"label","label":"Timetable title","type":"text","default":"Class 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Timetable</title>\n<style>\n:root{--bg:#fff;--fg:#37352f;--muted:#787774;--surface:#f7f7f5;--border:#e9e9e7;--accent:#2383e2;--accent-ink:#fff;--accent-text:var(--accent);--danger:#c24136}\nhtml[data-theme=\"dark\"]{--bg:#191919;--fg:#e6e6e4;--muted:#9b9a97;--surface:#252525;--border:#343434;--danger:#ff7369}\n@media(prefers-color-scheme:dark){html[data-theme=\"auto\"]{--bg:#191919;--fg:#e6e6e4;--muted:#9b9a97;--surface:#252525;--border:#343434;--danger:#ff7369}}\n*{box-sizing:border-box}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--fg);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,\"Segoe 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22px;gap:4px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}\n</style>\n</head>\n<body><main class=\"wrap\">\n  <header class=\"head\"><div><div class=\"kicker\">Weekly course overview</div><div class=\"title\" id=\"title\">Class timetable</div></div><div class=\"count\"><b id=\"count\">0</b>classes</div></header>\n  <form class=\"form\" id=\"form\"><label class=\"sr-only\" for=\"course\">Class</label><input id=\"course\" maxlength=\"48\" placeholder=\"Class or course\" required /><label class=\"sr-only\" for=\"day\">Weekday</label><select id=\"day\"><option>Monday</option><option>Tuesday</option><option>Wednesday</option><option>Thursday</option><option>Friday</option><option>Saturday</option><option>Sunday</option></select><label class=\"sr-only\" for=\"start\">Start time</label><input id=\"start\" type=\"time\" required /><label class=\"sr-only\" for=\"end\">End time</label><input id=\"end\" type=\"time\" required /><label class=\"sr-only\" for=\"room\">Room or location</label><input id=\"room\" maxlength=\"36\" placeholder=\"Room (optional)\" /><button type=\"submit\">Add</button></form>\n  <section class=\"list\" id=\"list\" aria-label=\"Weekly class timetable\"></section>\n  <footer class=\"foot\"><span class=\"status\" id=\"status\" aria-live=\"polite\">Timetable stays in this browser. No calendar sync.</span><button class=\"clear\" id=\"clear\" type=\"button\">Clear timetable</button></footer>\n  <div class=\"note\">A personal weekly reference, not an official school schedule or calendar sync.</div>\n</main>\n<script>\n(function(){\n  var cfgEl=document.getElementById('bk-config'),base={};try{base=cfgEl?JSON.parse(cfgEl.textContent||'{}'):{};}catch(e){}\n  var q=new URLSearchParams(location.search),c={};for(var k in base)c[k]=base[k];q.forEach(function(v,k){c[k]=v;});\n  function safeColor(v,d){return /^#[0-9a-f]{6}$/i.test(String(v||''))?String(v):d;}function rgb(hex){var s=String(hex).slice(1);return[0,2,4].map(function(i){return parseInt(s.slice(i,i+2),16);});}function lum(a){return a.map(function(v){v/=255;return v<=.04045?v/12.92:Math.pow((v+.055)/1.055,2.4);}).reduce(function(s,v,i){return s+v*[.2126,.7152,.0722][i];},0);}function contrast(a,b){var x=lum(a),y=lum(b);return(Math.max(x,y)+.05)/(Math.min(x,y)+.05);}function accentInk(hex){var a=rgb(hex);return contrast(a,[255,255,255])>=contrast(a,[0,0,0])?'#fff':'#000';}function accentText(hex){var dark=theme==='dark'||(theme==='auto'&&window.matchMedia&&window.matchMedia('(prefers-color-scheme: dark)').matches),bg=rgb(dark?'#252525':'#f7f7f5'),a=rgb(hex),to=dark?[255,255,255]:[0,0,0];if(contrast(a,bg)>=4.5)return hex;for(var t=.02;t<=1;t+=.02){var m=a.map(function(v,i){return Math.round(v+(to[i]-v)*t);});if(contrast(m,bg)>=4.5)return'#'+m.map(function(v){return v.toString(16).padStart(2,'0');}).join('');}return dark?'#fff':'#191919';}function setAccentText(){document.documentElement.style.setProperty('--accent-text',accentText(ACCENT));}\n  var theme=['auto','light','dark'].indexOf(String(c.theme||'auto'))>-1?String(c.theme||'auto'):'auto',ACCENT=safeColor(c.accent,'#2383e2'),LABEL=String(c.label||'Class timetable').slice(0,48),KEY='notion-arena.class-timetable.v1',days=['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],items=[];\n  document.documentElement.setAttribute('data-theme',theme);document.documentElement.style.setProperty('--accent',ACCENT);document.documentElement.style.setProperty('--accent-ink',accentInk(ACCENT));setAccentText();if(theme==='auto'&&window.matchMedia){var scheme=window.matchMedia('(prefers-color-scheme: dark)');if(scheme.addEventListener)scheme.addEventListener('change',setAccentText);else if(scheme.addListener)scheme.addListener(setAccentText);}document.getElementById('title').textContent=LABEL;document.title=LABEL;\n  try{var parsed=JSON.parse(localStorage.getItem(KEY)||'[]');if(Array.isArray(parsed))items=parsed.filter(function(x){return x&&typeof x.course==='string'&&days.indexOf(x.day)>=0;}).slice(0,80);}catch(e){}\n  var list=document.getElementById('list'),status=document.getElementById('status');function save(message){try{localStorage.setItem(KEY,JSON.stringify(items));status.textContent=message||'Timetable stays in this browser. No calendar sync.';}catch(e){status.textContent='Storage is unavailable in this browser session.';}}\n  function render(){list.textContent='';document.getElementById('count').textContent=String(items.length);if(!items.length){var empty=document.createElement('div');empty.className='empty';empty.textContent='Add a class to sketch your weekly schedule.';list.appendChild(empty);return;}days.forEach(function(day){var rows=items.filter(function(x){return x.day===day;}).sort(function(a,b){return a.start.localeCompare(b.start);});if(!rows.length)return;var group=document.createElement('div');group.className='day-group';var heading=document.createElement('div');heading.className='day-title';heading.textContent=day;group.appendChild(heading);rows.forEach(function(item){var index=items.indexOf(item),row=document.createElement('div');row.className='row';var time=document.createElement('span');time.className='time';time.textContent=item.start+' - '+item.end;var course=document.createElement('span');course.className='course';course.textContent=item.course;var room=document.createElement('span');room.className='room';room.textContent=item.room||'';var remove=document.createElement('button');remove.className='remove';remove.type='button';remove.textContent='×';remove.setAttribute('aria-label','Remove '+item.course+' on '+day);remove.addEventListener('click',function(){items.splice(index,1);save();render();});row.append(time,course,room,remove);group.appendChild(row);});list.appendChild(group);});}\n  document.getElementById('form').addEventListener('submit',function(e){e.preventDefault();var course=document.getElementById('course').value.trim().slice(0,48),day=document.getElementById('day').value,start=document.getElementById('start').value,end=document.getElementById('end').value,room=document.getElementById('room').value.trim().slice(0,36);if(!course||!start||!end||start>=end){status.textContent='Enter a class and an end time later than its start.';return;}if(items.length>=80){status.textContent='Class limit reached.';return;}items.push({course:course,day:day,start:start,end:end,room:room});document.getElementById('course').value='';document.getElementById('start').value='';document.getElementById('end').value='';document.getElementById('room').value='';save();render();document.getElementById('course').focus();});document.getElementById('clear').addEventListener('click',function(){items=[];save('Timetable cleared.');render();});render();\n})();\n</script>\n</body>\n</html>\n"}]}