AUI Application Header

Header dropdowns

Use the aui-dropdown-menu web component.

Header avatars

Add class aui-avatar to the A element; then use an IMG for the avatar (user generated avatars are presumed to be IMG elements). Size is locked to 24px.

Search...

Yes, include the label too. Placeholders don't replace labels. Be sure to use <input type="search" /> to get browser goodness.