how to use the slot element code example
Example: slot tag
<user-data>
<img src="sillyduck.jpg" slot="avatar">
<span slot="nickname">sillyduck</span>
<span slot="fullname">John Doe</span>
</user-data>
<user-data>
<img src="sillyduck.jpg" slot="avatar">
<span slot="nickname">sillyduck</span>
<span slot="fullname">John Doe</span>
</user-data>