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feat: Subsection anchor links with :target highlighting #135

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Merged
williamzujkowski merged 1 commit into from
Apr 1, 2026
Merged

feat: Subsection anchor links with :target highlighting #135

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25 changes: 25 additions & 0 deletions apps/web/src/pages/statute/[...slug].astro
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Original file line number Diff line number Diff line change
Expand Up @@ -441,6 +441,31 @@ const readingTimeMin = Math.max(1, Math.round(wordCount / 200));
})();
</script>

<!-- Subsection anchor IDs: (a) → #subsec-a, (a)(1) → #subsec-a-1 -->
<script is:inline>
(function () {
var prose = document.querySelector('.prose');
if (!prose) return;
var items = prose.querySelectorAll('li');
var currentParent = '';
items.forEach(function (li) {
var strong = li.querySelector('strong');
if (!strong) return;
var marker = strong.textContent.trim().replace(/[()]/g, '');
if (!marker) return;
// Determine nesting: top-level (a-z), numeric (1-99), upper (A-Z), roman (i-xx)
if (/^[a-z]$/.test(marker)) {
currentParent = marker;
li.id = 'subsec-' + marker;
} else if (/^\d{1,2}$/.test(marker) && currentParent) {
li.id = 'subsec-' + currentParent + '-' + marker;
} else if (/^[A-Z]$/.test(marker) && currentParent) {
li.id = 'subsec-' + currentParent + '-' + marker;
}
});
})();
</script>

<!-- Keyboard shortcuts: j/k navigate sections -->
<script is:inline>
document.addEventListener('keydown', function (e) {
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16 changes: 16 additions & 0 deletions apps/web/src/styles/global.css
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,22 @@
a[href]::after { content: none !important; }
}

/* Subsection anchor highlighting — gold flash when arriving via #subsec-a link */
[id^="subsec-"] {
scroll-margin-top: 4rem;
}

[id^="subsec-"]:target {
background: var(--color-amber-light, #FEF0C8);
border-radius: 0.25rem;
margin: -0.25rem;
padding: 0.25rem;
}

:where(.dark, .dark *) [id^="subsec-"]:target {
background: rgba(194, 133, 12, 0.15);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after {
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