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Mosaic Stack is not limited to coding — the Orchestrator and
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/vue-best-practices/reference/slot-name-reserved-prop.md

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+---
+title: Slot Name is Reserved and Not Included in Slot Props
+impact: LOW
+impactDescription: Expecting 'name' in scoped slot props when it's reserved causes confusion
+type: gotcha
+tags: [vue3, slots, scoped-slots, reserved-props, naming]
+---
+
+# Slot Name is Reserved and Not Included in Slot Props
+
+**Impact: LOW** - When using scoped slots, the `name` attribute on the `<slot>` element is reserved for identifying the slot. It is not passed as part of the slot props to the parent component.
+
+## Task Checklist
+
+- [ ] Don't expect `name` in slot props - it's reserved
+- [ ] Use a different prop name if you need to pass a name value
+- [ ] Remember only explicitly bound attributes become slot props
+
+**Incorrect Expectation:**
+```vue
+<!-- ChildComponent.vue -->
+<template>
+  <div>
+    <slot name="header" title="Welcome"></slot>
+  </div>
+</template>
+```
+
+```vue
+<!-- ParentComponent.vue -->
+<ChildComponent>
+  <template #header="props">
+    <!-- props = { title: "Welcome" } -->
+    <!-- 'name' is NOT included! -->
+    {{ props.name }}  <!-- undefined -->
+    {{ props.title }} <!-- "Welcome" -->
+  </template>
+</ChildComponent>
+```
+
+**If You Need to Pass a "Name" Value:**
+```vue
+<!-- ChildComponent.vue -->
+<template>
+  <div>
+    <!-- Use a different prop name like 'slotName' or 'label' -->
+    <slot name="header" :label="slotLabel" :title="title"></slot>
+  </div>
+</template>
+
+<script setup>
+const slotLabel = 'header'
+const title = 'Welcome'
+</script>
+```
+
+```vue
+<!-- ParentComponent.vue -->
+<ChildComponent>
+  <template #header="{ label, title }">
+    <h2>{{ title }}</h2>
+    <span>Section: {{ label }}</span>
+  </template>
+</ChildComponent>
+```
+
+## What Gets Passed as Slot Props
+
+| Attribute on `<slot>` | Passed to Parent? |
+|----------------------|-------------------|
+| `name` | No (reserved for slot identification) |
+| `:text="message"` | Yes, as `text` |
+| `:count="5"` | Yes, as `count` |
+| `v-bind="object"` | Yes, spreads object properties |
+| `class="..."` | No (not bound with `:`) |
+
+## Multiple Named Slots Example
+
+```vue
+<!-- TabPanel.vue -->
+<template>
+  <div class="tabs">
+    <slot name="tab1" :active="activeTab === 1" :label="'First Tab'"></slot>
+    <slot name="tab2" :active="activeTab === 2" :label="'Second Tab'"></slot>
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+const activeTab = ref(1)
+</script>
+```
+
+```vue
+<!-- Usage -->
+<TabPanel>
+  <template #tab1="{ active, label }">
+    <!-- 'name' not available, but 'label' is -->
+    <button :class="{ active }">{{ label }}</button>
+  </template>
+
+  <template #tab2="{ active, label }">
+    <button :class="{ active }">{{ label }}</button>
+  </template>
+</TabPanel>
+```
+
+## Reference
+- [Vue.js Slots - Scoped Slots](https://vuejs.org/guide/components/slots.html#scoped-slots)