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>
40 lines
1 KiB
JavaScript
40 lines
1 KiB
JavaScript
'use strict';
|
|
|
|
var callBound = require('call-bound');
|
|
var $toString = callBound('Object.prototype.toString');
|
|
var hasSymbols = require('has-symbols')();
|
|
var safeRegexTest = require('safe-regex-test');
|
|
|
|
if (hasSymbols) {
|
|
var $symToStr = callBound('Symbol.prototype.toString');
|
|
var isSymString = safeRegexTest(/^Symbol\(.*\)$/);
|
|
|
|
/** @type {(value: object) => value is Symbol} */
|
|
var isSymbolObject = function isRealSymbolObject(value) {
|
|
if (typeof value.valueOf() !== 'symbol') {
|
|
return false;
|
|
}
|
|
return isSymString($symToStr(value));
|
|
};
|
|
|
|
/** @type {import('.')} */
|
|
module.exports = function isSymbol(value) {
|
|
if (typeof value === 'symbol') {
|
|
return true;
|
|
}
|
|
if (!value || typeof value !== 'object' || $toString(value) !== '[object Symbol]') {
|
|
return false;
|
|
}
|
|
try {
|
|
return isSymbolObject(value);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
} else {
|
|
/** @type {import('.')} */
|
|
module.exports = function isSymbol(value) {
|
|
// this environment does not support Symbols.
|
|
return false && value;
|
|
};
|
|
}
|