# Namespace (Class on Detached DOM)
Some parts of component are detached to `document.body`. If you want to add a class to those detached elements, use `namespace` prop of `n-config-provider`. Open devtools to see detached part.
```html
<n-config-provider :namespace="ns">
  <n-tooltip
    placement="bottom"
    trigger="click"
  >
    <template v-slot:activator>
      <n-button
        @click="isActive = true"
      >
        Activate Component with Detached Content
      </n-button>
    </template>
    <span>
      Detached Part
    </span>
  </n-tooltip>
</n-config-provider>
```
```js
export default {
  data () {
    return {
      ns: 'custom-app-namespace1',
      isActive: false
    }
  }
}
```