configurable patch target

Chunk Visualizer

Choose which dashboard region is slow. The iframe loads a streamed document where the server sends the other regions' <template for> chunks first.

stream evidence


      

      

        
range markup

        
<article>
  <?start name="hero">Hero placeholder<?end>
</article>
<article>
  <?start name="stats">Stats placeholder<?end>
</article>

      

    

  


  

    
what to look for

    
The slow target's placeholder remains until its delayed template arrives. Other regions are not updated by JavaScript; they patch because the streamed template target matches their processing-instruction range.

  


  

    
references

    
  


  

    
implementation reference

    
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗