thermograph/static/day.html
Emi Griffith 4d3a5a1053 Convert the frontend to ES modules; split nav.js by concern (#48)
The frontend was classic scripts sharing one global scope, with a
load-order contract enforced only by comments (leaflet -> nav ->
shared -> mappicker -> page) and hand-rolled window.Thermograph /
window.LocationPicker namespaces. Page scripts now import what they use;
the dependency graph replaces the ordering contract, and no app globals
remain (Leaflet stays a classic script / global L, loaded first).

nav.js had grown four concerns; it's now three single-purpose modules:
- nav.js: last-location memory + header view-links + locHash.
- units.js: the °F/°C toggle and unit-aware formatting. The compare
  special case is gone — pages that want the toggle import units.js;
  compare simply doesn't.
- cache.js: the IndexedDB response cache, SWR getJSON, bundle-seeded
  view prefetch and neighbor warming. prefetchViews(lat, lon, ownViews)
  now takes the calling page's own view names instead of a page-identity
  map (VIEW_OWN) — adding a page no longer means editing this module.
  The slice->URL map stays here as bundle-contract knowledge.

frontend/package.json ({"type": "module"}) makes CI's node --check
parse the files as modules.

Verified: node --check on all files as modules; 108 backend tests;
headless-Chromium smoke across all five pages against live data — zero
console/page errors, all render assertions pass (cards, chart, calendar
grid + metric switch, ladders, compare ranking, legend scales).
2026-07-11 20:28:33 +00:00

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — a single day</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — a single day" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/day" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
<link rel="stylesheet" href="style.css" />
</head>
<body>
<header>
<div class="brand">
<span class="logo"></span>
<div>
<h1>Thermograph · Day</h1>
<p class="tag">Every percentile boundary for one day vs its typical climate</p>
</div>
<nav class="view-nav" aria-label="Views">
<a href="./" data-view="map">Weekly</a>
<a href="calendar" data-view="calendar">Calendar</a>
<a href="day" data-view="day" class="active">Day</a>
<a href="compare" data-view="compare">Compare</a>
</nav>
</div>
</header>
<main>
<section class="controls">
<div class="find-bar">
<button type="button" id="find-btn" class="find-btn"></button>
<span id="loc-label" class="loc-label" hidden></span>
</div>
<div class="day-nav">
<button type="button" id="prev-day" class="day-step" title="Previous day" aria-label="Previous day"></button>
<label class="day-date">Day
<input id="date-input" type="date" />
</label>
<button type="button" id="next-day" class="day-step" title="Next day" aria-label="Next day"></button>
</div>
</section>
<div id="day-head" class="cal-head" hidden></div>
<div class="placeholder" id="day-placeholder">
<p>Pick a place and a day — or open this from a day on the map or calendar — to see
the value at every tier boundary for that day's typical climate.</p>
</div>
<div id="day-body"></div>
</main>
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
<script type="module" src="day.js"></script>
</body>
</html>