@greendrake/vue-kit

Vue/Pinia building blocks with no API or UI dependency: the global loading state, reactive media queries, light/dark colour mode, and a factory for lazily-loaded reference collections.

Install

bun add @greendrake/vue-kit vue pinia

vue (^3.5.34) and pinia (^3.0.4) are peers. TypeScript source ships as-is (no build step, no .d.ts), for Vite + Vue 3 apps written in TypeScript. @greendrake/util and @greendrake/scss-kit install as dependencies.

App loading state

useAppState() is a Pinia store around a loading counter:

• loadingCounter, and the isLoading getter (counter > 0).
• setLoading(on) — increments or decrements the counter.
• isFirstLoading — true until the counter first empties; distinguishes the boot splash from later in-app spinners.
• hasNavigated — a one-way latch set once a navigation has committed, i.e. once something usable is on screen (the app shell sets it from the router's afterEach). Distinct from isFirstLoading, which can flip with the screen still bare.

import { useAppState } from '@greendrake/vue-kit'

const appState = useAppState()
appState.setLoading(true)
try {
    await loadEverything()
} finally {
    appState.setLoading(false)
}

The usual holders: an app shell, one slot for the boot sequence, released when the first render settles; an API client, one per pending call.

Media queries

import { useMediaQuery, useWideScreen } from '@greendrake/vue-kit'

const reducedMotion = useMediaQuery('(prefers-reduced-motion: reduce)')
const wide = useWideScreen()

useMediaQuery(query) returns a Ref<boolean> bound to matchMedia(query) and detaches its listener on onUnmounted, so it is called from component setup. useWideScreen() is useMediaQuery(mediaAbove('narrow')): true from 601px up, the same boundary @greendrake/scss-kit's respond-above('narrow') mixin uses.

Colour mode

The palette binds to the light/dark classes on <html> and falls back to prefers-color-scheme when neither is set. This module owns those classes, the saved preference (localStorage key colorMode) and the reactive isDark ref.

// main.ts, before mount — so an explicit choice never flashes the OS palette first
import { initColorMode } from '@greendrake/vue-kit'

initColorMode()

<script setup lang="ts">
import { isDark, toggleColorMode } from '@greendrake/vue-kit'
</script>
<template>
    <button @click="toggleColorMode">{{ isDark ? 'Light' : 'Dark' }}</button>
</template>

initColorMode() applies the saved class, sets isDark, and keeps it following the OS preference while no explicit choice has been made. toggleColorMode() flips between the two classes (from the OS default it picks the opposite of the current preference), updates isDark and saves the choice.

Collection store

defineCollectionStore(id, options) defines a Pinia store for a shared, lazily-loaded, request-deduplicated reference collection.

import { byProp } from '@greendrake/util'
import { defineCollectionStore } from '@greendrake/vue-kit'
import { api } from '@/api'

export const useVlans = defineCollectionStore('vlans', {
    load: () => api.call('vlan.list'),
    compare: byProp('name'),
    indexBy: vlan => vlan.id
})

CollectionStoreOptions<T, K>: load: () => Promise<T[]>; compare?: Comparator<T> (@greendrake/util's type), applied after every load so lists are stable across mounts; indexBy?: (item: T) => K, which enables the byKey index.

The store exposes items (a plain reactive array — row surgery is ordinary array mutation), byKey (computed Record<K, T>, empty without indexBy), ensure() (loads once per session, deduplicating concurrent callers through the in-flight promise) and invalidate() (the next ensure() re-fetches — call it after a mutation).

const vlans = useVlans()
await vlans.ensure()
const name = vlans.byKey[id]?.name