Ariakit vue exploration with port of Heading

frontend/package.json

@@ -60,6 +60,7 @@
     "doc:media-props": "node ./scripts/document-media.js"
   },
   "dependencies": {
+    "@ariakit/core": "^0.4.10",
     "@floating-ui/dom": "^1.6.8",
     "@nuxtjs/plausible": "^1.0.2",
     "@nuxtjs/robots": "^4.0.2",
@@ -91,6 +92,13 @@
     "@nuxtjs/storybook": "npm:@nuxtjs/storybook@nightly",
     "@playwright/test": "1.46.1",
     "@storybook-vue/nuxt": "npm:@storybook-vue/nuxt@nightly",
+    "@storybook/addon-essentials": "8.2.9",
+    "@storybook/addon-interactions": "8.2.9",
+    "@storybook/addon-links": "8.2.9",
+    "@storybook/blocks": "8.2.9",
+    "@storybook/builder-vite": "8.2.9",
+    "@storybook/test": "8.2.9",
+    "@storybook/vue3": "8.2.9",
     "@testing-library/user-event": "^14.5.2",
     "@testing-library/vue": "^8.1.0",
     "@vitest/coverage-v8": "^2.0.5",
@@ -105,21 +113,14 @@
     "npm-run-all2": "^6.2.2",
     "nuxt": "3.13.1",
     "rimraf": "^6.0.1",
+    "storybook": "8.2.9",
     "talkback": "^4.2.0",
     "typescript": "5.5.4",
     "vitest": "^2.0.5",
     "vitest-dom": "^0.1.1",
     "vue": "3.5.0",
     "vue-router": "^4.4.0",
-    "vue-tsc": "2.1.4",
-    "storybook": "8.2.9",
-    "@storybook/vue3": "8.2.9",
-    "@storybook/addon-links": "8.2.9",
-    "@storybook/builder-vite": "8.2.9",
-    "@storybook/addon-essentials": "8.2.9",
-    "@storybook/addon-interactions": "8.2.9",
-    "@storybook/test": "8.2.9",
-    "@storybook/blocks": "8.2.9"
+    "vue-tsc": "2.1.4"
   },
   "browserslist": [
     "> 1%",

frontend/src/components/VFourOhFour.vue

@@ -7,6 +7,8 @@ import { useAnalytics } from "~/composables/use-analytics"
 import { ALL_MEDIA } from "~/constants/media"
 import { skipToContentTargetId } from "~/constants/window"
 
+import AHeadingLevel from "~/components/ariakit/heading/AHeadingLevel.vue"
+import AHeading from "~/components/ariakit/heading/AHeading.vue"
 import VLink from "~/components/VLink.vue"
 import VStandaloneSearchBar from "~/components/VHeader/VSearchBar/VStandaloneSearchBar.vue"
 import VSvg from "~/components/VSvg/VSvg.vue"
@@ -47,14 +49,15 @@ useHead({
     >
       <!-- Push content by 1/4th height without absolute positioning. -->
       <div class="spacer grow" />
-      <main
+      <AHeadingLevel
         :id="skipToContentTargetId"
+        as="main"
         tabindex="-1"
         class="z-10 grow-[3] space-y-4 lg:space-y-6"
       >
-        <h1 class="heading-5 lg:heading-2 mb-6 lg:mb-10 lg:leading-tight">
+        <AHeading class="heading-5 lg:heading-2 mb-6 lg:mb-10 lg:leading-tight">
           {{ $t("404.title") }}
-        </h1>
+        </AHeading>
         <p class="sr-only">{{ error }}</p>
         <p class="label-bold lg:heading-6">
           <i18n-t scope="global" keypath="404.main" tag="span">
@@ -68,7 +71,7 @@ useHead({
           </i18n-t>
         </p>
         <VStandaloneSearchBar route="404" @submit="handleSearch" />
-      </main>
+      </AHeadingLevel>
     </div>
   </div>
 </template>

frontend/src/components/ariakit/heading/AHeading.composable.ts

@@ -0,0 +1,40 @@
+import { computed, MaybeRef, onUnmounted } from "vue"
+
+import { useMemoize } from "@vueuse/core"
+
+import { useTagName } from "~/composables/ariakit"
+
+import type { Renderable } from "~/types/ariakit"
+
+import { HeadingContext } from "./HeadingContext"
+
+export interface UseHeadingOptions {
+  templateRef: MaybeRef<Element | null>
+  element?: Renderable
+}
+
+export function useHeading({ templateRef, element }: UseHeadingOptions) {
+  const level = HeadingContext.inject() || 1
+  const Element = element || (`h${level}` as const)
+  const tagName = useTagName(
+    templateRef,
+    typeof element === "string" ? element : `h${level}`
+  )
+  const getIsNativeHeading = useMemoize((tagName: string) =>
+    /^h\d$/.test(tagName)
+  )
+  const isNativeHeading = computed(
+    () => !!tagName.value && getIsNativeHeading(tagName.value)
+  )
+  onUnmounted(() => getIsNativeHeading.clear())
+
+  const attributes = computed(() => ({
+    role: !isNativeHeading.value ? "heading" : undefined,
+    "aria-level": !isNativeHeading.value ? level : undefined,
+  }))
+
+  return {
+    Element,
+    attributes,
+  }
+}

frontend/src/components/ariakit/heading/AHeading.vue

@@ -0,0 +1,24 @@
+<script setup lang="ts" generic="T extends Renderable = 'h1'">
+import { ref, mergeProps, computed } from "vue"
+
+import type { Renderable, AsProps } from "~/types/ariakit"
+
+import { useHeading } from "./AHeading.composable"
+
+const { as, asProps } = defineProps<AsProps<T>>()
+const templateRef = ref<Element | null>(null)
+const { Element, attributes } = useHeading({ element: as, templateRef })
+const mergedProps = computed(() => mergeProps(asProps ?? {}, attributes.value))
+</script>
+
+<template>
+  <component :is="Element" v-bind="mergedProps" :ref="templateRef">
+    <slot
+      v-bind="{
+        Element,
+        attributes,
+        setTemplateRef: (e: Element) => (templateRef = e),
+      }"
+    />
+  </component>
+</template>

frontend/src/components/ariakit/heading/AHeadingLevel.composable.ts

@@ -0,0 +1,15 @@
+import { HeadingContext, type HeadingLevels } from "./HeadingContext"
+
+export interface HeadingLevelOptions {
+  level?: HeadingLevels
+}
+
+export function useHeadingLevel({ level }: HeadingLevelOptions) {
+  const contextLevel = HeadingContext.inject() || 0
+  const nextLevel = Math.max(
+    Math.min(level || contextLevel + 1, 6),
+    1
+  ) as HeadingLevels
+  HeadingContext.provide(nextLevel)
+  return nextLevel
+}

frontend/src/components/ariakit/heading/AHeadingLevel.vue

@@ -0,0 +1,19 @@
+<script setup lang="ts" generic="T extends Renderable = never">
+import type { Renderable, AsProps } from "~/types/ariakit"
+
+import {
+  useHeadingLevel,
+  type HeadingLevelOptions,
+} from "./AHeadingLevel.composable"
+
+const props = defineProps<HeadingLevelOptions & AsProps<T>>()
+
+useHeadingLevel(props)
+</script>
+
+<template>
+  <component :is="as" v-if="as" v-bind="asProps ?? {}">
+    <slot />
+  </component>
+  <slot v-else />
+</template>

frontend/src/components/ariakit/heading/HeadingContext.ts

@@ -0,0 +1,17 @@
+import { provide, inject, type InjectionKey } from "vue"
+
+export type HeadingLevels = 1 | 2 | 3 | 4 | 5 | 6
+
+export type HeadingContext = HeadingLevels
+const HeadingContextKey: InjectionKey<HeadingContext> =
+  Symbol.for("ariakit-heading")
+
+export const HeadingContext = Object.freeze({
+  key: HeadingContextKey,
+  provide(context: HeadingContext) {
+    provide(HeadingContextKey, context)
+  },
+  inject() {
+    return inject(HeadingContextKey, 0)
+  },
+})

frontend/src/components/ariakit/heading/meta/AHeading.stories.ts

@@ -0,0 +1,31 @@
+import { h } from "vue"
+
+import AHeading from "~/components/ariakit/heading/AHeading.vue"
+
+import AHeadingLevel from "~/components/ariakit/heading/AHeadingLevel.vue"
+
+import type { Meta, StoryObj } from "@storybook/vue3"
+
+const meta = {
+  title: "Ariakit/Heading",
+} satisfies Meta<typeof AHeading>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const AHeadingStory: Story = {
+  render: () => ({
+    components: { AHeading, AHeadingLevel },
+    setup() {
+      return () =>
+        h("div", { class: "wrapper" }, [
+          h(AHeadingLevel, null, [
+            h(AHeading, { class: "heading" }, ["First heading"]),
+            h(AHeadingLevel, null, [
+              h(AHeading, { as: { element: "div" } }, ["Second heading"]),
+            ]),
+          ]),
+        ])
+    },
+  }),
+}