docs(modal): provide an example to bind event listeners (#1611)

docs/components/content/ComponentExample.vue

@@ -1,6 +1,7 @@
 <template>
   <div class="[&>div>pre]:!rounded-t-none [&>div>pre]:!mt-0">
     <div
+      v-if="hasPreview"
       class="flex border border-gray-200 dark:border-gray-700 relative rounded-t-md"
       :class="[{ 'p-4': padding, 'rounded-b-md': !hasCode, 'border-b-0': hasCode, 'not-prose': !prose }, backgroundClass, extraClass]"
     >
@@ -37,6 +38,10 @@ const props = defineProps({
     type: Object,
     default: () => ({})
   },
+  hiddenPreview: {
+    type: Boolean,
+    default: false
+  },
   hiddenCode: {
     type: Boolean,
     default: false
@@ -79,6 +84,7 @@ const data = await fetchContentExampleCode(camelName)
 const highlighter = useShikiHighlighter()
 
 const hasCode = computed(() => !props.hiddenCode && (data?.code || instance.slots.code))
+const hasPreview = computed(() => !props.hiddenPreview && (props.component || instance.slots.default))
 
 const { data: ast } = await useAsyncData(`content-example-${camelName}-ast`, () => transformContent('content:_markdown.md', `\`\`\`vue\n${data?.code ?? ''}\n\`\`\``, {
   markdown: {

docs/components/content/examples/ModalExampleComponent.vue

@@ -5,13 +5,24 @@ defineProps({
     default: 0
   }
 })
+
+const emit = defineEmits(['success'])
+
+function onSuccess () {
+  emit('success')
+}
 </script>
 
 <template>
   <UModal>
     <UCard>
-      <p>This modal was opened programmatically !</p>
-      <p>Count: {{ count }}</p>
+      <div class="space-y-2">
+        <p>This modal was opened programmatically !</p>
+        <p>Count: {{ count }}</p>
+        <UButton @click="onSuccess">
+          Click to emit a success event
+        </UButton>
+      </div>
     </UCard>
   </UModal>
 </template>

docs/components/content/examples/ModalExampleComposable.vue

@@ -1,13 +1,20 @@
 <script setup lang="ts">
 import { ModalExampleComponent } from '#components'
 
+const toast = useToast()
 const modal = useModal()
 const count = ref(0)
 
 function openModal () {
   count.value += 1
   modal.open(ModalExampleComponent, {
-    count: count.value
+    count: count.value,
+    onSuccess () {
+      toast.add({
+        title: 'Success !',
+        id: 'modal-success'
+      })
+    }
   })
 }
 </script>