\startbuffer [component]
    \startcomponent *
        ((set reference\textreference[check]{check}))
    \stopcomponent
\stopbuffer

\savebuffer[list=component,file=test-component.tex,prefix=no]

\setupinteraction [state=start]

\starttext

    there: \in[check]

  % \start
        \component test-component
  % \stop

    there: \in[check]
    \page
    there: \in[check]

\stoptext
