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>
43 lines
1.6 KiB
JavaScript
43 lines
1.6 KiB
JavaScript
'use strict';
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var keys = require('object-keys');
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module.exports = function hasSymbols() {
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if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
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if (typeof Symbol.iterator === 'symbol') { return true; }
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var obj = {};
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var sym = Symbol('test');
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var symObj = Object(sym);
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if (typeof sym === 'string') { return false; }
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if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
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if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
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/*
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* temp disabled per https://github.com/ljharb/object.assign/issues/17
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* if (sym instanceof Symbol) { return false; }
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* temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
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* if (!(symObj instanceof Symbol)) { return false; }
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*/
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var symVal = 42;
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obj[sym] = symVal;
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for (sym in obj) { return false; } // eslint-disable-line no-unreachable-loop
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if (keys(obj).length !== 0) { return false; }
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if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
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if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
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var syms = Object.getOwnPropertySymbols(obj);
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if (syms.length !== 1 || syms[0] !== sym) { return false; }
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if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
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if (typeof Object.getOwnPropertyDescriptor === 'function') {
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var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
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if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
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}
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return true;
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};
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