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> |
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| .. | ||
| index.d.ts | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
AssertionError and AssertionResult classes.
What is AssertionError?
Assertion Error is a module that contains two classes: AssertionError, which
is an instance of an Error, and AssertionResult which is not an instance of
Error.
These can be useful for returning from a function - if the function "succeeds"
return an AssertionResult and if the function fails return (or throw) an
AssertionError.
Both AssertionError and AssertionResult implement the Result interface:
interface Result {
name: "AssertionError" | "AssertionResult";
ok: boolean;
toJSON(...args: unknown[]): Record<string, unknown>;
}
So if a function returns AssertionResult | AssertionError it is easy to check
which one is returned by checking either .name or .ok, or check
instanceof Error.
Installation
Node.js
assertion-error is available on npm.
$ npm install --save assertion-error
Deno
assertion_error is available on
Deno.land
import {
AssertionError,
AssertionResult,
} from "https://deno.land/x/assertion_error@2.0.0/mod.ts";