feat(Accordion): add multiple prop and close others by default (#364)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/content/2.elements/5.accordion.md

@@ -16,6 +16,7 @@ Pass an array to the `items` prop of the Accordion component. Each item can have
 - `content` - The content to display in the panel by default.
 - `disabled` - Determines whether the item is disabled or not.
 - `defaultOpen` - Determines whether the item is initially open or closed.
+- `closeOthers` - Determines whether the item click close others or not. **It only works with multiple mode**.
 
 ::component-example
 #default
@@ -51,14 +52,14 @@ You can also pass any prop from the [Button](/elements/button) component directl
 ---
 baseProps:
   items:
-    - label: "1. What is NuxtLabs UI?"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "2. Getting Started"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "3. Theming"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "4. Components"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
+    - label: '1. What is NuxtLabs UI?'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '2. Getting Started'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '3. Theming'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '4. Components'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
 props:
   color: 'primary'
   variant: 'soft'
@@ -90,14 +91,14 @@ You can also set them to `null` to hide the icons.
 ---
 baseProps:
   items:
-    - label: "1. What is NuxtLabs UI?"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "2. Getting Started"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "3. Theming"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "4. Components"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
+    - label: '1. What is NuxtLabs UI?'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '2. Getting Started'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '3. Theming'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: '4. Components'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
 props:
   openIcon: 'i-heroicons-plus'
   closeIcon: 'i-heroicons-minus'
@@ -107,29 +108,54 @@ excludedProps:
 ---
 ::
 
-### Open
+### Multiple
 
-Use the `default-open` prop to open all items by default.
+Use the `multiple` prop to to allow multiple elements to be opened at the same time.
 
 ::component-card
 ---
 baseProps:
   items:
-    - label: "What is NuxtLabs UI?"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "Getting Started"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "Theming"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
-    - label: "Components"
-      content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit"
+    - label: 'What is NuxtLabs UI?'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Getting Started'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Theming'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Components'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
 props:
-  defaultOpen: true
+  multiple: true
 excludedProps:
   - defaultOpen
 ---
 ::
 
+### Open
+
+Use the `default-open` prop to open all items by default. Works better when the `multiple` prop is set to `true`.
+
+::component-card
+---
+baseProps:
+  items:
+    - label: 'What is NuxtLabs UI?'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Getting Started'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Theming'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+    - label: 'Components'
+      content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit'
+props:
+  defaultOpen: true
+  multiple: true
+excludedProps:
+  - defaultOpen
+  - multiple
+---
+::
+
 ## Slots
 
 You can use slots to customize the buttons and items content of the Accordion.

src/runtime/components/elements/Accordion.vue

@@ -1,7 +1,7 @@
 <template>
   <div :class="ui.wrapper">
     <HDisclosure v-for="(item, index) in items" v-slot="{ open, close }" :key="index" :default-open="defaultOpen || item.defaultOpen">
-      <HDisclosureButton as="template" :disabled="item.disabled">
+      <HDisclosureButton :ref="() => buttonRefs[index] = close" as="template" :disabled="item.disabled">
         <slot :item="item" :index="index" :open="open" :close="close">
           <UButton v-bind="{ ...omit(ui.default, ['openIcon', 'closeIcon']), ...$attrs, ...omit(item, ['slot', 'disabled', 'content', 'defaultOpen']) }" class="w-full">
             <template #trailing>
@@ -18,6 +18,8 @@
         </slot>
       </HDisclosureButton>
 
+      <StateEmitter :open="open" @open="closeOthers(index)" />
+
       <Transition
         v-bind="ui.transition"
         @enter="onEnter"
@@ -45,6 +47,7 @@ import { defu } from 'defu'
 import { omit } from 'lodash-es'
 import UIcon from '../elements/Icon.vue'
 import UButton from '../elements/Button.vue'
+import StateEmitter from '../../utils/StateEmitter'
 import type { Button } from '../../types/button'
 import { useAppConfig } from '#imports'
 // TODO: Remove
@@ -57,12 +60,13 @@ export default defineComponent({
     HDisclosureButton,
     HDisclosurePanel,
     UIcon,
-    UButton
+    UButton,
+    StateEmitter
   },
   inheritAttrs: false,
   props: {
     items: {
-      type: Array as PropType<Partial<Button & { slot: string, disabled: boolean, content: string, defaultOpen: boolean }>[]>,
+      type: Array as PropType<Partial<Button & { slot: string, disabled: boolean, content: string, defaultOpen: boolean, closeOthers: boolean }>[]>,
       default: () => []
     },
     defaultOpen: {
@@ -77,6 +81,10 @@ export default defineComponent({
       type: String,
       default: () => appConfig.ui.accordion.default.closeIcon
     },
+    multiple: {
+      type: Boolean,
+      default: false
+    },
     ui: {
       type: Object as PropType<Partial<typeof appConfig.ui.accordion>>,
       default: () => appConfig.ui.accordion
@@ -90,6 +98,20 @@ export default defineComponent({
 
     const uiButton = computed<Partial<typeof appConfig.ui.button>>(() => appConfig.ui.button)
 
+    const buttonRefs = ref<Function[]>([])
+
+    function closeOthers (itemIndex: number) {
+      if (!props.items[itemIndex].closeOthers && props.multiple) {
+        return
+      }
+
+      buttonRefs.value.forEach((close, index) => {
+        if (index === itemIndex) return
+
+        close()
+      })
+    }
+
     function onEnter (el: HTMLElement, done) {
       el.style.height = '0'
       el.offsetHeight // Trigger a reflow, flushing the CSS changes
@@ -108,20 +130,22 @@ export default defineComponent({
     }
 
     function onLeave (el: HTMLElement, done) {
-      el.style.height = '0';
+      el.style.height = '0'
 
-      (el as HTMLElement).addEventListener('transitionend', done, { once: true })
+      el.addEventListener('transitionend', done, { once: true })
     }
 
     return {
       // eslint-disable-next-line vue/no-dupe-keys
       ui,
       uiButton,
+      buttonRefs,
+      closeOthers,
+      omit,
       onEnter,
       onBeforeLeave,
       onAfterEnter,
-      onLeave,
-      omit
+      onLeave
     }
   }
 })

src/runtime/utils/StateEmitter.ts

@@ -0,0 +1,22 @@
+import { watch, defineComponent } from 'vue'
+
+export default defineComponent({
+  props: {
+    open: {
+      type: Boolean,
+      default: false
+    }
+  },
+  emits: ['open', 'close'],
+  setup (props, { emit }) {
+    watch(() => props.open, (value) => {
+      if (value) {
+        emit('open')
+      } else {
+        emit('close')
+      }
+    })
+
+    return () => {}
+  }
+})