v150 · DOM · Forms · Customizable Select
Styled Mirrors
The same selected option DOM is cloned into four real <selectedcontent> descendants, then styled as a toolbar chip, status bar, breadcrumb, and preview tile.
Checking selectedcontent support…
These mirrors are deliberately placed inside the select subtree. The page is probing Chrome 150's edge behavior where every descendant
<selectedcontent> receives the selected option clone.
Option data available in the clone
| Attribute | Value | Used in |
|---|---|---|
| Select an option to see its data | ||
see also
- Sync Inspector — observer timing for simultaneous updates
- Multiple Mirrors — three mirrors at different DOM positions
- Mutation Timing — deferred clone safety
- ChromeStatus entry
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗