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Merged
SandObserver merged 2 commits into from
Oct 15, 2026
Merged

Feature: show placeholder shapes while widgets load #460

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1ec09df
Show placeholder shapes while widgets load, not empty cards or wrong …
SandObserver Oct 15, 2026
34f5763
Restamp caches
SandObserver Oct 15, 2026
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26 changes: 26 additions & 0 deletions ui/js/widget-toolbox.js
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Original file line number Diff line number Diff line change
Expand Up @@ -488,6 +488,32 @@ export function errorState(opts = {}) {
return _errorState(Object.assign({ t: _t }, opts));
}

const PH_STYLE_ID = 'wt-ph-css';
const PH_CSS =
'.wt-ph{display:inline-block;vertical-align:middle;flex:none;border-radius:4px;' +
'background:var(--wt-ph,rgba(235,235,245,0.16))}' +
'html[data-theme="light"] .wt-ph{background:var(--wt-ph,rgba(60,60,67,0.12))}';

/** A soft rounded shape that stands in for content still loading. Set --wt-ph
on an ancestor to recolour it for a light surface.
@param {number|string} width px, or any CSS length @param {number} [height] px
@param {number} [radius] px @returns {HTMLElement} */
export function placeholder(width, height = 10, radius = 4) {
if (!document.getElementById(PH_STYLE_ID)) {
const s = document.createElement('style');
s.id = PH_STYLE_ID;
s.textContent = PH_CSS;
document.head.appendChild(s);
}
const el = document.createElement('span');
el.className = 'wt-ph';
el.setAttribute('aria-hidden', 'true');
el.style.width = typeof width === 'number' ? width + 'px' : width;
el.style.height = height + 'px';
el.style.borderRadius = radius + 'px';
return el;
}

/** The reader's wording for a failure, for a widget that draws its own state.
@param {unknown} err a caught error, or { kind } from a response
@returns {string} */
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44 changes: 44 additions & 0 deletions ui/test/widget-placeholder.test.mjs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,44 @@
import assert from 'node:assert/strict';
import fs from 'node:fs';
import { register } from 'node:module';
import { test } from 'node:test';

register('./js-root-hooks.mjs', import.meta.url);
globalThis.location = /** @type {any} */ ({ search: '?id=test' });

const nodes = new Map();
const mk = tag => ({
tagName: tag,
style: {},
attrs: {},
setAttribute(k, v) {
this.attrs[k] = v;
},
appendChild(c) {
if (c.id) nodes.set(c.id, c);
},
});
globalThis.document = /** @type {any} */ ({
documentElement: { getAttribute: () => 'dark' },
head: mk('head'),
getElementById: id => nodes.get(id) || null,
createElement: mk,
});
const { placeholder } = await import('../js/widget-toolbox.js');

test('a placeholder is a hidden, sized shape, and its style is added once', () => {
const a = placeholder(72, 9);
const b = placeholder('40%', 12, 6);
assert.equal(a.className, 'wt-ph');
assert.equal(a.attrs['aria-hidden'], 'true');
assert.deepEqual([a.style.width, a.style.height, a.style.borderRadius], ['72px', '9px', '4px']);
assert.deepEqual([b.style.width, b.style.height, b.style.borderRadius], ['40%', '12px', '6px']);
assert.equal([...nodes.keys()].filter(k => k === 'wt-ph-css').length, 1);
});

test('no widget claims a state before its data arrives', () => {
const page = p => fs.readFileSync(new URL(`../widgets/${p}`, import.meta.url), 'utf8');
assert.doesNotMatch(page('nowplaying/index.html'), /id="title">Nothing playing</);
assert.doesNotMatch(page('books/index.html'), /id="lbl">READING</);
assert.doesNotMatch(page('weather/index.html'), /id="temp">--/);
});
2 changes: 1 addition & 1 deletion ui/widgets/backup/backup.html
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Expand Up @@ -121,7 +121,7 @@
<body>
<div class="widget" id="widget" role="group" aria-label="Backup status"></div>
<script type="module">
import { poll, fetchData, openUrl, linkTo, html, setHtml, loadStrings, wt, errorState, errorLine, formatNumber, cssZoom } from '/js/widget-toolbox.js?v=7d38d7fb';
import { poll, fetchData, openUrl, linkTo, html, setHtml, loadStrings, wt, errorState, errorLine, formatNumber, cssZoom } from '/js/widget-toolbox.js?v=9f9c7421';
await loadStrings();
document.getElementById('widget').setAttribute('aria-label', wt('ui.backupStatus', 'Backup status'));
const id = new URLSearchParams(location.search).get('id') || '';
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29 changes: 25 additions & 4 deletions ui/widgets/books/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -85,7 +85,7 @@
<body>
<div class="card" id="card" role="group" aria-label="Books">
<div class="bk-link" id="bk-link"></div>
<div class="head" id="lbl">READING</div>
<div class="head" id="lbl"></div>
<div class="shelves" id="shelves">
<div class="shelf-wrap">
<span class="shelf-lbl" hidden></span>
Expand All @@ -101,9 +101,8 @@
<span class="sr" id="sr" aria-live="polite"></span>
</div>
<script type="module">
import { poll, linkTo, loadStrings, wt, formatNumber, errorState } from '/js/widget-toolbox.js?v=7d38d7fb';
import { poll, linkTo, loadStrings, wt, formatNumber, errorState, placeholder } from '/js/widget-toolbox.js?v=9f9c7421';
await loadStrings();
document.getElementById('lbl').textContent = wt('ui.reading', 'Reading');
document.getElementById('card').setAttribute('aria-label', wt('widget.label', 'Books'));
const API='/api';
const params=new URLSearchParams(location.search);
Expand Down Expand Up @@ -162,6 +161,7 @@

function render(books,list,shelf){
list.innerHTML='';
list.removeAttribute('aria-hidden');
list.classList.remove('sparse','pointing');
shelf.querySelectorAll('.empty').forEach(n=>n.remove());
/* Removing the bullets drops the list semantics in one engine, so the role
Expand Down Expand Up @@ -210,7 +210,24 @@
});
}

function paintPlaceholders(){
lbl.replaceChildren(placeholder(72,9));
for(const bay of bays){
const n=Math.min(SHOW,Math.max(5,Math.floor((bay.list.clientWidth||140)/18)));
bay.list.setAttribute('aria-hidden','true');
bay.list.replaceChildren(...Array.from({length:n},(_,i)=>{
const ph=placeholder(14+(i*7)%5,0,1.5);
ph.style.height=(62+(i*37)%32)+'%';
ph.style.borderRadius='1.5px 1.5px 0 0';
return ph;
}));
}
fT.replaceChildren(placeholder(90,10));
fP.replaceChildren(placeholder(36,10));
}

async function boot(){
paintPlaceholders();
try{
const r=await fetch(`${API}/widget-config/${encodeURIComponent(id)}`);
if(r.ok){ const c=await r.json(); href=(c&&c.widgetConfig&&c.widgetConfig.href)||''; }
Expand All @@ -223,7 +240,11 @@

poll({ interval:POLL_MS,
isEmpty:d=>(Array.isArray(d&&d.shelves)?d.shelves:[]).every(sh=>!(sh&&Array.isArray(sh.books)&&sh.books.length)),
onEmpty:()=>{ paintFoot(null); state.empty(wt('ui.noBooks','No books')); },
onEmpty:d=>{
lbl.textContent=SHELVES>1?wt('widget.label','Books'):shelfName((d&&d.shelves||[])[0]);
for(const bay of bays){ bay.list.replaceChildren(); bay.list.removeAttribute('aria-hidden'); }
paintFoot(null); state.empty(wt('ui.noBooks','No books'));
},
onError:({error,everOk,stale,since})=>{ if(!everOk||stale) state.fail(error,{since,inert:everOk}); },
render:d=>{
state.ok();
Expand Down
2 changes: 1 addition & 1 deletion ui/widgets/clock/analog.html
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,7 @@
async function showZoneError(){
const w=document.getElementById('widget');
w.className='widget mode-'+_mode;
const { errorState, loadStrings, wt } = await import('/js/widget-toolbox.js?v=7d38d7fb');
const { errorState, loadStrings, wt } = await import('/js/widget-toolbox.js?v=9f9c7421');
await loadStrings();
const line=wt('ui.unknownZone','Unknown timezone');
errorState({ root: w, place: 'center' }).empty(line);
Expand Down
2 changes: 1 addition & 1 deletion ui/widgets/clock/digital.html
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Original file line number Diff line number Diff line change
Expand Up @@ -85,7 +85,7 @@
}
async function showZoneError() {
const w = document.getElementById('widget');
const { errorState, loadStrings, wt } = await import('/js/widget-toolbox.js?v=7d38d7fb');
const { errorState, loadStrings, wt } = await import('/js/widget-toolbox.js?v=9f9c7421');
await loadStrings();
const line = wt('ui.unknownZone', 'Unknown timezone');
errorState({ root: w, place: 'center' }).empty(line);
Expand Down
2 changes: 1 addition & 1 deletion ui/widgets/connections/connections-map.html
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Original file line number Diff line number Diff line change
Expand Up @@ -179,7 +179,7 @@
})(window.__DOTS);
</script>
<script type="module">
import { poll, fetchData, openUrl, html, setHtml, colorOrFallback, loadStrings, wt, errorState, theme, formatNumber, cssZoom, linkTo } from '/js/widget-toolbox.js?v=7d38d7fb';
import { poll, fetchData, openUrl, html, setHtml, colorOrFallback, loadStrings, wt, errorState, theme, formatNumber, cssZoom, linkTo } from '/js/widget-toolbox.js?v=9f9c7421';
await loadStrings();
document.getElementById('c').setAttribute('aria-label', wt('ui.worldMap', 'World map of connections'));
(function(){
Expand Down
24 changes: 23 additions & 1 deletion ui/widgets/connections/connections-vpn.html
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Original file line number Diff line number Diff line change
Expand Up @@ -64,7 +64,7 @@
<div class="wrap" id="wrap" role="img" aria-label="VPN status"></div>
<script>window.__DOTS={"cols":100,"rows":39,"minLat":-58.0,"maxLat":84.0,"countries":["CA","GL","NO","RU","US","SE","FI","IS","GB","DK","LV","IE","NL","DE","PL","BY","KZ","CN","FR","CZ","UA","MN","IT","HR","RS","RO","ES","AL","BG","GE","TM","UZ","KG","PT","GR","TR","IR","AZ","TJ","KP","MA","DZ","TN","SY","IQ","AF","PK","IN","KR","JP","MX","LY","EG","SA","NP","BT","EH","MR","ML","AE","OM","MM","CN-TW","NE","TD","SD","LA","VN","ER","YE","TH","PH","NI","SN","BF","NG","ET","KH","CO","VE","SL","GN","CI","GH","BJ","CF","SS","-99","GY","SR","LR","CM","SO","MY","BR","GA","CG","CD","UG","KE","ID","EC","PE","RW","TZ","PG","AO","ZM","BO","MW","MZ","AU","ZW","MG","VU","PY","NA","BW","CL","AR","ZA","UY","NZ"],"dots":[26,0,0,27,0,0,28,0,0,29,0,0,30,0,0,31,0,0,32,0,0,34,0,1,37,0,1,38,0,1,39,0,1,40,0,1,21,1,0,24,1,0,26,1,0,27,1,0,28,1,0,30,1,1,31,1,1,32,1,1,33,1,1,34,1,1,35,1,1,36,1,1,37,1,1,38,1,1,39,1,1,40,1,1,41,1,1,42,1,1,43,1,1,44,1,1,53,1,2,54,1,2,78,1,3,19,2,0,23,2,0,24,2,0,25,2,0,26,2,0,27,2,0,34,2,1,35,2,1,36,2,1,37,2,1,38,2,1,39,2,1,40,2,1,41,2,1,42,2,1,43,2,1,65,2,3,66,2,3,74,2,3,75,2,3,76,2,3,77,2,3,78,2,3,79,2,3,80,2,3,88,2,3,89,2,3,91,2,3,0,3,3,6,3,4,18,3,0,19,3,0,20,3,0,23,3,0,25,3,0,26,3,0,27,3,0,28,3,0,29,3,0,35,3,1,36,3,1,37,3,1,38,3,1,39,3,1,40,3,1,41,3,1,42,3,1,43,3,1,65,3,3,69,3,3,70,3,3,71,3,3,72,3,3,73,3,3,74,3,3,75,3,3,76,3,3,77,3,3,78,3,3,79,3,3,80,3,3,81,3,3,82,3,3,83,3,3,84,3,3,85,3,3,87,3,3,88,3,3,89,3,3,90,3,3,91,3,3,0,4,3,4,4,4,5,4,4,6,4,4,7,4,4,8,4,4,9,4,4,10,4,4,11,4,0,12,4,0,13,4,0,14,4,0,15,4,0,16,4,0,17,4,0,18,4,0,19,4,0,20,4,0,21,4,0,22,4,0,23,4,0,24,4,0,25,4,0,26,4,0,30,4,0,31,4,0,35,4,1,36,4,1,37,4,1,38,4,1,39,4,1,40,4,1,54,4,2,55,4,5,56,4,5,57,4,6,58,4,3,59,4,3,60,4,3,62,4,3,63,4,3,64,4,3,65,4,3,66,4,3,67,4,3,68,4,3,69,4,3,71,4,3,72,4,3,73,4,3,74,4,3,75,4,3,76,4,3,77,4,3,78,4,3,79,4,3,80,4,3,81,4,3,82,4,3,83,4,3,84,4,3,85,4,3,86,4,3,87,4,3,88,4,3,89,4,3,90,4,3,91,4,3,92,4,3,93,4,3,94,4,3,95,4,3,96,4,3,97,4,3,98,4,3,99,4,3,5,5,4,6,5,4,7,5,4,8,5,4,9,5,4,10,5,4,11,5,0,12,5,0,13,5,0,14,5,0,15,5,0,16,5,0,17,5,0,18,5,0,19,5,0,20,5,0,21,5,0,22,5,0,23,5,0,24,5,0,26,5,0,27,5,0,30,5,0,31,5,0,36,5,1,37,5,1,38,5,1,44,5,7,53,5,5,54,5,5,55,5,5,56,5,6,57,5,6,58,5,3,59,5,3,60,5,3,61,5,3,62,5,3,63,5,3,64,5,3,65,5,3,66,5,3,67,5,3,68,5,3,69,5,3,70,5,3,71,5,3,72,5,3,73,5,3,74,5,3,75,5,3,76,5,3,77,5,3,78,5,3,79,5,3,80,5,3,81,5,3,82,5,3,83,5,3,84,5,3,85,5,3,86,5,3,87,5,3,88,5,3,89,5,3,90,5,3,91,5,3,92,5,3,93,5,3,94,5,3,95,5,3,96,5,3,97,5,3,98,5,3,99,5,3,4,6,4,5,6,4,6,6,4,7,6,4,8,6,4,10,6,4,11,6,0,12,6,0,13,6,0,14,6,0,15,6,0,16,6,0,17,6,0,18,6,0,19,6,0,20,6,0,21,6,0,22,6,0,23,6,0,28,6,0,29,6,0,30,6,0,37,6,1,51,6,2,52,6,2,53,6,5,54,6,5,56,6,6,58,6,3,59,6,3,60,6,3,61,6,3,62,6,3,63,6,3,64,6,3,65,6,3,66,6,3,67,6,3,68,6,3,69,6,3,70,6,3,71,6,3,72,6,3,73,6,3,74,6,3,75,6,3,76,6,3,77,6,3,78,6,3,79,6,3,80,6,3,81,6,3,82,6,3,83,6,3,84,6,3,85,6,3,86,6,3,87,6,3,88,6,3,89,6,3,90,6,3,91,6,3,92,6,3,95,6,3,96,6,3,13,7,0,14,7,0,15,7,0,16,7,0,17,7,0,18,7,0,19,7,0,20,7,0,21,7,0,22,7,0,23,7,0,24,7,0,29,7,0,30,7,0,31,7,0,32,7,0,48,7,8,52,7,9,53,7,5,54,7,5,56,7,10,57,7,10,58,7,3,59,7,3,60,7,3,61,7,3,62,7,3,63,7,3,64,7,3,65,7,3,66,7,3,67,7,3,68,7,3,69,7,3,70,7,3,71,7,3,72,7,3,73,7,3,74,7,3,75,7,3,76,7,3,77,7,3,78,7,3,79,7,3,80,7,3,81,7,3,82,7,3,83,7,3,84,7,3,85,7,3,86,7,3,87,7,3,93,7,3,94,7,3,14,8,0,15,8,0,16,8,0,17,8,0,18,8,0,19,8,0,20,8,0,21,8,0,22,8,0,23,8,0,24,8,0,25,8,0,26,8,0,28,8,0,29,8,0,30,8,0,31,8,0,32,8,0,33,8,0,34,8,0,47,8,11,49,8,8,51,8,12,52,8,13,53,8,13,54,8,14,55,8,14,56,8,14,57,8,15,58,8,15,59,8,3,60,8,3,61,8,3,62,8,3,63,8,3,64,8,3,65,8,3,66,8,3,67,8,16,68,8,16,69,8,16,70,8,16,71,8,16,72,8,3,73,8,3,74,8,3,75,8,3,76,8,3,77,8,3,78,8,3,79,8,3,80,8,3,81,8,3,82,8,3,83,8,3,84,8,17,85,8,3,86,8,3,87,8,3,88,8,3,89,8,3,93,8,3,16,9,0,17,9,0,18,9,0,19,9,0,20,9,0,21,9,0,22,9,0,23,9,0,24,9,0,25,9,0,26,9,0,27,9,0,28,9,0,29,9,0,30,9,0,32,9,0,34,9,0,49,9,18,50,9,18,51,9,18,52,9,13,53,9,13,54,9,19,55,9,14,56,9,20,57,9,20,58,9,20,59,9,20,60,9,20,61,9,3,62,9,3,63,9,16,64,9,16,65,9,16,66,9,16,67,9,16,68,9,16,69,9,16,70,9,16,71,9,16,72,9,16,73,9,16,74,9,3,75,9,21,76,9,21,77,9,21,78,9,21,79,9,21,80,9,3,81,9,21,82,9,17,83,9,17,84,9,17,85,9,17,86,9,3,87,9,3,88,9,3,89,9,3,16,10,4,17,10,4,18,10,4,19,10,4,20,10,4,21,10,4,22,10,4,23,10,4,24,10,4,25,10,4,26,10,4,27,10,0,28,10,0,29,10,0,30,10,4,31,10,0,50,10,18,51,10,18,52,10,22,53,10,22,54,10,23,55,10,24,56,10,25,57,10,25,59,10,3,60,10,3,61,10,3,62,10,3,65,10,16,66,10,16,67,10,16,68,10,16,69,10,16,70,10,16,71,10,16,72,10,16,73,10,17,74,10,17,75,10,21,76,10,21,77,10,21,78,10,21,79,10,21,80,10,21,81,10,21,82,10,17,83,10,17,84,10,17,85,10,17,86,10,17,87,10,3,15,11,4,16,11,4,17,11,4,18,11,4,19,11,4,20,11,4,21,11,4,22,11,4,23,11,4,24,11,4,25,11,4,26,11,4,27,11,4,28,11,4,29,11,4,47,11,26,48,11,26,49,11,26,50,11,26,52,11,18,53,11,22,55,11,27,56,11,28,57,11,28,62,11,29,65,11,16,66,11,30,67,11,31,68,11,16,69,11,16,70,11,32,71,11,32,72,11,17,73,11,17,74,11,17,75,11,17,76,11,17,77,11,17,78,11,17,79,11,17,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<script type="module">
import { readableInk, poll, fetchData, linkTo, esc, loadStrings, wt, errorLine } from '/js/widget-toolbox.js?v=7d38d7fb';
import { readableInk, poll, fetchData, linkTo, esc, loadStrings, wt, errorLine, placeholder } from '/js/widget-toolbox.js?v=9f9c7421';
await loadStrings();
document.getElementById('wrap').setAttribute('aria-label', wt('ui.vpnStatus', 'VPN status'));
(function(){
Expand Down Expand Up @@ -189,6 +189,28 @@
wrap.setAttribute('aria-label',aria);
}

function renderPlaceholder(){
const small=size==='small';
const pad=document.createElement('div'); pad.className='pad';
const info=document.createElement('div'); info.className='info';
const eyebrow=document.createElement('div'); eyebrow.className='eyebrow';
eyebrow.append(placeholder(30,9),placeholder(48,9));
const hero=document.createElement('div'); hero.className='hero';
hero.append(placeholder(small?96:130,small?12:18));
info.append(eyebrow,hero);
if(!small){
const metrics=document.createElement('div'); metrics.className='metrics';
metrics.append(placeholder(104,10),placeholder(78,10));
info.append(metrics);
}
const geo=document.createElement('div'); geo.className='geo';
geo.style.display='flex'; geo.style.alignItems='center'; geo.style.justifyContent='center';
geo.append(placeholder(small?64:96,small?44:64,12));
pad.append(info,geo);
wrap.replaceChildren(pad);
}
renderPlaceholder();

async function vfetch(){
if(!id) throw new Error('fetch failed');
return fetchData('vpn');
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