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>
28 lines
677 B
JavaScript
28 lines
677 B
JavaScript
'use strict';
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const isStream = stream =>
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stream !== null &&
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typeof stream === 'object' &&
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typeof stream.pipe === 'function';
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isStream.writable = stream =>
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isStream(stream) &&
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stream.writable !== false &&
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typeof stream._write === 'function' &&
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typeof stream._writableState === 'object';
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isStream.readable = stream =>
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isStream(stream) &&
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stream.readable !== false &&
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typeof stream._read === 'function' &&
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typeof stream._readableState === 'object';
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isStream.duplex = stream =>
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isStream.writable(stream) &&
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isStream.readable(stream);
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isStream.transform = stream =>
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isStream.duplex(stream) &&
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typeof stream._transform === 'function';
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module.exports = isStream;
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