Holes, and a hole with two writers

BareMirror writes each row of this table from a template. A template is data. A keyword in it is a hole: BareMirror fills it from the item of the row.

Add a row
The template

      

      

        
The item of the selected row

        

      

      

        
The selected row in the page

        

      

    


    
Two writers

    
Click Grace, then add a row. The highlight jumps back to Ada, and the item of Grace still
      says :selected? true. The hole on selected is
      shared: x-table writes that attribute too, from its
      own value, which still names Ada. The last write wins.

    
    

    
    The check
    
    
    BareMirror can find such a hole before it bites. It compares the holes of a template with
      the writes that BareDOM declares for each component:
    
    
    (template/shared-holes (splits :rows) on-this-page)