A header with common actions and design elements built in.
## When To Use
PageHeader can be used to highlight the page topic, display important information about the page, and carry the action items related to the current page (including page-level operations, inter-page navigation, etc.) It can also be used as inter-page navigation.
## API
| Param | Description | Type | Default value |
| --- | --- | --- | --- |
| avatar | Avatar next to the title bar | [avatar props](/components/avatar/) | - |
| backIcon | custom back icon, if false the back icon will not be displayed | string\|slot | `<ArrowLeft />` |