# Native Vue Router integration reference

Use this reference for `@native-vue-router/*` version `0.1.x`. Inspect installed
declarations or local source when integrating another version.

## Support and ownership

- Requires Vue `^3.5.0` and Vue Router `^5.0.0`.
- Targets client-side DOM navigation. SSR/live-stack hydration is incomplete.
- Vue Router owns committed routes, URLs, history, guards, redirects, and lazy
  route matching.
- Native Vue Router owns preview surfaces, mounted-view caching, gesture
  progress, presentations, and transaction state.
- Preview trees receive scoped Vue Router route injection. `useRoute()` and
  Options API `$route` identify that surface; `router.currentRoute` identifies
  the globally committed route.
- The URL does not change during a forward preview. Vue Router navigation and
  guards run when the gesture or imperative transaction commits.

## Packages and styles

```bash
npm install vue@^3.5 vue-router@^5 @native-vue-router/core
```

Optional packages:

```bash
npm install @native-vue-router/preset-native
npm install @native-vue-router/capacitor @capacitor/app @capacitor/core @capacitor/haptics
npm install @native-vue-router/electron
```

Import styles explicitly:

```ts
import "@native-vue-router/core/style.css";
import "@native-vue-router/preset-native/style.css"; // when used
```

Give the route shell a definite height. The core `.nvr-navigator` and
`.nvr-router-view` elements use `height: 100%`.

## Bootstrap template

```ts
import { createApp } from "vue";
import { createRouter, createWebHistory } from "vue-router";
import { createNativeRouter } from "@native-vue-router/core";
import App from "./App.vue";
import "@native-vue-router/core/style.css";

const router = createRouter({
  history: createWebHistory(),
  routes,
});

const nativeRouter = createNativeRouter({
  router,
  cache: { maxInactive: 4 },
  // edgeWidth: 28,
  // platform,
  // presentations: [customPresentation],
});

const app = createApp(App);
app.use(router);
app.use(nativeRouter);
await router.isReady();
app.mount("#app");
```

```vue
<script setup lang="ts">
import { NativeNavigator, NativeRouterView } from "@native-vue-router/core";

const siblings = ["/inbox", "/stories", "/profile"];
</script>

<template>
  <NativeNavigator :siblings="siblings" :edge-width="28">
    <NativeRouterView />
  </NativeNavigator>
</template>
```

Install Vue Router before the native plugin. Retain ordinary nested
`RouterView`s within route components.

## Route metadata

```ts
interface NativeRouteOptions {
  navigator?: string;
  presentation?:
    "push" | "reveal" | "slide" | "fade" | "modal" | "sheet" | "none" | string;
  transition?: string;
  parent?: RouteLocationRaw | ((route) => RouteLocationRaw);
  siblingGroup?: string;
  siblingOrder?: number;
  siblingHistory?: "push" | "replace";
  cache?: boolean | "pin";
  gesture?: boolean | "edge" | "full";
}
```

- Prefer `presentation`; `transition` is a compatibility alias.
- `parent` supplies a synthetic predictive Back destination if no warm native
  history predecessor exists.
- `siblingOrder` determines direction for programmatic sibling navigation.
- `siblingHistory: "replace"` is the usual tab behavior.
- `cache: false` prevents inactive retention. `cache: "pin"` avoids ordinary LRU
  trimming and is excluded from default `trimCache()`.
- `gesture: false` is enforced by `NativeNavigator`. In `0.1.x`, finer
  `edge`/`full` policy is mainly structural.
- `navigator` and `siblingGroup` are reserved; pass siblings to the navigator
  explicitly.

Example with dynamic parent state:

```ts
{
  path: "/chat/:id/details",
  name: "chat-details",
  component: () => import("./ChatDetailsView.vue"),
  meta: {
    native: {
      presentation: "push",
      parent: (route) => ({
        name: "chat",
        params: { id: route.params.id },
        query: route.query,
        hash: route.hash,
      }),
      gesture: "edge",
    },
  },
}
```

## Core components

### `NativeRouterView`

Renders every mounted native entry as a sibling layer. Its default slot exposes:

```ts
{
  Component: Component | undefined;
  route: RouteLocationNormalizedLoaded;
  entry: NativeViewEntry;
}
```

Without a slot, it renders the matched route component. Inactive layers are
hidden, `inert`, and `aria-hidden`.

### `NativeNavigator`

Props:

- `siblings: RouteLocationRaw[]` (default `[]`)
- `edgeWidth: number` (default `28`)

Owns leading-edge predictive Back and optional full-surface paging between the
listed siblings. The list is visual order. Route `siblingOrder` also makes
programmatic direction deterministic.

### `NativeLink`

Props:

- `to: RouteLocationRaw` (required)
- `replace: boolean`
- `presentation: NativePresentationName`

Renders an anchor with a resolved `href`. Primary unmodified clicks use native
`push` or `replace`; other attributes pass through.

### `NativeGestureLink`

Props:

- `to: RouteLocationRaw` (required)
- `presentation` (default `"reveal"`)
- `replace: boolean`
- `direction: "left" | "right" | "any"` (default `"any"`)
- `as: string` (default `"div"`)

Owns horizontal component-originated navigation. A click uses native `push`.
Choose semantic markup and add accessible keyboard behavior as needed.

### `NativeDismissGesture`

Prop `as` defaults to `div`. Owns downward vertical dismissal for a modal or
sheet surface.

### `NativeSheet`

Use inside a route with `meta.native.presentation: "sheet"`. The sheet route is
contained below `--nvr-safe-top` plus `--nvr-sheet-top-gap`, and its previous
route remains visible but inert as an underlay.

Props:

- `breakpoints: number[]` (default `[]`): normalized fractions in `(0, 1]`.
  Empty means content height capped at available height.
- `initialBreakpoint?: number`: starts at the nearest declared fraction.
- `modelValue?: number`: current fraction for `v-model`.
- `dismissible: boolean` (default `true`).
- `backdropDismiss: boolean` (default `true`).
- `showHandle: boolean` (default `true`).
- `ariaLabel: string` (default `"Sheet"`).

Events are `update:modelValue`, `breakpoint-change`, and `dismiss`. The named
`handle` slot replaces only the handle visual. The built-in handle supports
pointer dragging, Escape, Arrow Up/Down, Home, and End.

The body keeps native scrolling while it has content in the requested
direction. At the top, downward overscroll shrinks or dismisses the sheet. At
the bottom, upward overscroll expands it. The handoff supports touch,
mouse/pen dragging, and thresholded wheel/trackpad input. A snapping
`NativeSheet` animates its own measured surface, while the route-sized wrapper
stays fixed and the previous route retains its underlay scale across commit.

Ownership locks after the gesture's initial directional intent. If content owns
the gesture, reaching an edge or reversing does not transfer that same gesture
to the sheet; release and start at the edge to resize. Never implement a
mid-gesture reinterpretation using distance accumulated while content was
scrolling.

```vue
<script setup lang="ts">
import { ref } from "vue";
import { NativeSheet } from "@native-vue-router/core";

const point = ref(0.55);
</script>

<template>
  <NativeSheet
    v-model="point"
    :breakpoints="[0.3, 0.55, 1]"
    :initial-breakpoint="0.55"
    aria-label="Filters"
  >
    <FilterForm />
  </NativeSheet>
</template>
```

Theme with `--nvr-sheet-background`, `--nvr-sheet-backdrop`,
`--nvr-sheet-radius`, and `--nvr-sheet-top-gap`. Prefer `NativeSheet` to
`NativeDismissGesture` for partial or snapping route sheets.

### Gesture exclusions

The recognizers ignore ordinary form/editable controls and elements within:

```html
<div data-native-gesture="ignore">...</div>
```

Use this for maps, carousels, canvases, code editors, and custom horizontal
controls.

## Runtime API

Create/inject:

- `createNativeRouter(options): NativeRouterRuntime`
- `useNativeRouter(): NativeRouterRuntime`
- Options API: `this.$nativeRouter`

Reactive readonly state:

- `router`
- `entries`
- `activeKey`
- `transaction`
- `canGoBack`
- `cacheStats`

Navigation:

```ts
push(to, options?): Promise<boolean>
replace(to, options?): Promise<boolean>
sibling(to, options?): Promise<boolean>
pop(): Promise<boolean>
present(to, presentation = "modal"): Promise<boolean>
dismiss(): Promise<boolean>
preload(to): Promise<RouteLocationNormalizedLoaded>
```

`NativeNavigationOptions` supports:

```ts
{
  presentation?: NativePresentationName;
  replace?: boolean;
  direction?: "forward" | "back" | "up" | "down";
  sourceRect?: {
    top: number;
    left: number;
    width: number;
    height: number;
    viewportWidth: number;
    viewportHeight: number;
  };
}
```

Interactive driver:

```ts
beginInteractive(kind, to?, options?): Promise<number | null>
updateInteractive(progress, velocity?): void
finishInteractive(forceCommit?): Promise<boolean>
cancelInteractive(): Promise<void>
```

Kinds are `push`, `pop`, `sibling`, `present`, and `dismiss`. Progress is clamped
to `0...1`. Velocity is normalized route progress per second. The default commit
rule is progress at least `0.36`, or progress at least `0.08` with velocity at
least `1.1`.

Cache/diagnostics/extension:

```ts
unload(to): number
trimCache({ includePinned?, reason? }?): void
onDiagnostic(listener): () => void
registerPresentation(definition): void
presentationFor(name): NativePresentationDefinition | undefined
dispose(): void
```

Call `dispose()` if the owning application lifecycle tears the runtime down
without a page unload.

## Native view lifecycle

Available APIs:

```ts
useNativeViewLifecycle();
onNativeViewActivate(hook);
onNativeViewDeactivate(hook);
onNativeViewShow(hook);
onNativeViewHide(hook);
onNativeViewEvict(hook);
useNativeViewActiveEffect(effect);
useNativeViewVisibleEffect(effect);
```

Lifecycle state:

- `route`: scoped route for the view.
- `status`: `active`, `inactive`, `preview`, or `evicted`.
- `role`: `active`, `inactive`, `underlay`, `from`, or `to`.
- `isActive`: authoritative committed route.
- `isVisible`: active, one side of a live transition, or a visible sheet
  underlay. Underlays remain inert.
- `isPreview`: destination not yet committed.
- `isCached`: mounted inactive route.
- `evictionReason`: `cache-disabled`, `cache-limit`,
  `navigation-rejected`, `popped`, `manual`, `trimmed`, or `memory-pressure`.

Effects may return cleanup functions. Active effects suit polling,
subscriptions, media, and committed-screen analytics. Visible effects suit work
needed while the surface participates in a transition.

Do not treat Vue component mount as route commitment. A preview can mount before
guards run and unmount after rejection or gesture cancellation.

## Vue compatibility

Within a native route surface:

- Vue Composition and Options API lifecycle hooks retain normal component
  semantics.
- App/plugin/ancestor `provide` and `inject` work normally.
- `useRoute`, `useRouter`, and Options API `$route` are supported.
- Params, query, hash, metadata, and matched records are scoped to each preview
  or committed surface.
- Nested `RouterView` is supported.
- `KeepAlive`, `Transition`, `Teleport`, and `Suspense` may be used inside the
  `NativeRouterView` slot.

Important distinctions:

- Native route caching is separate from `KeepAlive`. A cached native route stays
  mounted, so native inactivity alone does not trigger Vue `onDeactivated`.
- Native presentations animate route layers; a Vue `Transition` handles changes
  within one layer.
- Teleported DOM escapes the route layer's `inert`/`aria-hidden` isolation. Gate
  it with `isVisible` and close it when the owning view hides where appropriate.
- Async route components are loaded before preview. A `Suspense` inside the route
  can still show fallback UI for async descendants.

Slot composition example:

```vue
<NativeRouterView v-slot="{ Component, route }">
  <Suspense>
    <Transition name="content" mode="out-in">
      <KeepAlive :max="3">
        <component :is="Component" :key="route.fullPath" />
      </KeepAlive>
    </Transition>
    <template #fallback><RouteSkeleton /></template>
  </Suspense>
</NativeRouterView>
```

## Custom presentation

```ts
import { definePresentation } from "@native-vue-router/core";

const scaleFade = definePresentation({
  name: "scale-fade",
  axis: "x",
  layerStyle({ role, progress, direction, sourceRect }) {
    return role === "to"
      ? { opacity: progress, transform: `scale(${0.94 + progress * 0.06})` }
      : { opacity: 1 - progress * 0.25 };
  },
});
```

Register through `createNativeRouter({ presentations: [...] })` or
`runtime.registerPresentation()`. Keep layer styles compositor-friendly and do
not perform application or history mutations in a style function.

## Preset-native API

- `NativeBackButton` prop: `label` (default `"Back"`). Calls `native.pop()`.
- `NativeTabBar` prop: required `items: NativeTabItem[]`. It uses replace-style
  native sibling navigation.
- `NativeTabItem`: `{ label, to, icon?, activeWhen? }`.
- `detectNativePlatform()`: `"ios" | "android" | "desktop"`.
- `nativeMotionTokens`: edge widths and commit thresholds for those three
  platform labels. Core physics are not route-configurable from these tokens in
  `0.1.x`.

## Capacitor adapter

```ts
createCapacitorAdapter({
  exitAtRoot?: boolean;          // default true behavior
  haptics?: boolean;             // default enabled on native
  trimCacheOnPause?: boolean;    // default true
  deepLinkPath?: (url: URL) => string;
})
```

It handles Android hardware Back, App URL open/launch URLs, interactive
cancellation on pause, optional inactive-cache trimming, root exit, and haptics.
Native link association/configuration remains an application responsibility.

## Electron adapter

Main process, before `app.whenReady()`:

```ts
disableElectronHistoryGestures(app.commandLine);
```

Renderer:

```ts
createNativeRouter({
  router,
  platform: createElectronRendererAdapter(),
});
```

The preload may expose:

```ts
window.nativeVueHost = {
  onBack(callback): () => void,
  onForward?(callback): () => void,
  onMemoryPressure?(callback): () => void,
};
```

Use a secure context bridge; do not enable Node integration merely for the
adapter. Packaged `file:` apps commonly require hash history.

## Verification matrix

At minimum verify:

| Area        | Checks                                                                            |
| ----------- | --------------------------------------------------------------------------------- |
| Boot        | Initial route renders after `router.isReady`; CSS and height are correct          |
| Route state | Params, query, hash, `useRoute`, `$route`, nested routes, provide/inject          |
| Preview     | Source and destination coexist; URL stays on source; cancellation removes preview |
| Guards      | Acceptance, rejection, and redirect reconcile to Vue Router's result              |
| Back        | Warm Back, browser Back/Forward, direct-entry parent, no unrelated cached target  |
| Siblings    | Direction follows order; chosen push/replace history behavior is correct          |
| Cache       | Local warm state, `cache: false`, pin, LRU, unload, trim, eviction cleanup        |
| Lifecycle   | Active/visible effects stop and resume at the correct boundaries                  |
| Vue         | KeepAlive, Transition, Teleport, Suspense, component hook ordering                |
| Input       | Edge Back, component drag, vertical scroll, ignored regions, rapid interruption   |
| A11y        | Inactive focus isolation, semantic controls, keyboard access, reduced motion      |
| Hosts       | PWA limits, Electron commands/history, Capacitor Back/deep links/pause            |

## Known boundaries

- One runtime coordinates one authoritative visual transaction at a time.
- Preview setup can run before navigation approval.
- The mounted cache is bounded; route-local state can be lost after eviction.
- Cold-start predictive Back requires explicit parent topology.
- Browser content cannot guarantee ownership of operating-system/browser edge
  gestures.
- Independent nested navigation controllers and SSR stack hydration need an
  explicit design beyond the current `0.1.x` implementation.