Ole-Morten Duesund
e8428de775
Vite + TypeScript PWA that mirrors the Android app's core features: - Pre-processed shelter data (build-time UTM33N→WGS84 conversion) - Leaflet map with shelter markers, user location, and offline tiles - Canvas compass arrow (ported from DirectionArrowView.kt) - IndexedDB shelter cache with 7-day staleness check - Service worker with CacheFirst tiles and precached app shell - i18n for en, nb, nn (ported from Android strings.xml) - iOS/Android compass handling with low-pass filter - Respects user map interaction (no auto-snap on pan/zoom) - Build revision cache-breaker for reliable SW updates Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
24 lines
453 B
JavaScript
24 lines
453 B
JavaScript
"use strict";
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function isASCIIDigit(c) {
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return c >= 0x30 && c <= 0x39;
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}
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function isASCIIAlpha(c) {
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return (c >= 0x41 && c <= 0x5A) || (c >= 0x61 && c <= 0x7A);
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}
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function isASCIIAlphanumeric(c) {
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return isASCIIAlpha(c) || isASCIIDigit(c);
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}
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function isASCIIHex(c) {
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return isASCIIDigit(c) || (c >= 0x41 && c <= 0x46) || (c >= 0x61 && c <= 0x66);
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}
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module.exports = {
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isASCIIDigit,
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isASCIIAlpha,
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isASCIIAlphanumeric,
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isASCIIHex
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};
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