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Docs Prototypes Whitepaper

Base Library

Base prototype library

This page showcases the plain protocol-first base prototypes.

At the base layer, a prototype should stop at interaction semantics that are broadly reusable. For dropdown-menu, that boundary is:

  • overlay open/close coordination
  • collection ordering and item snapshots
  • active item, roving focus, and typeahead
  • narrow policy surfaces for item commit close and open entry (closeOnItemCommit / closeOnCommit, openEntry / openEntryValue)

It does not, at this layer, define persistent selection, checkbox/radio item semantics, or submenu anatomy. The transient active navigation state is kept internal for now instead of being committed as root API. Those should be composed above base prototypes instead of being precommitted here.

select is the current probe for a slightly different boundary: it still stays protocol-first, but it explicitly keeps a value presentation part inside the family. That part is used to validate Proto UI’s current value-class component path, where selected text is owned by the prototype and refreshed through explicit update-driven re-render instead of being pushed entirely to the host app.