nanoGo nanoGo Go playground · WebAssembly
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IDE workspace 1 file · main.go
Inputs & resultsStructured data

Pass named values to your program with host.Input. Collect output with host.Emit. Inputs stay in this tab and are not included in share links.

Applies to Run and Project. Steps measure guest work, not elapsed time or memory. Stop terminates the worker.

No execution yet
Run a program to see its results here.
Diagnostics

        

      


      
      

        

          🎨 Canvas Output
          Visual
        

        

          

            
          

        

      


      
      

        

          📋 Console Output
          
            
            
            Text
          
        

        

          
Welcome to nanoGo!
Select an example from the sidebar to get started! 🚀

        

      


      
      

        

          🌐 Template Output
          HTML
        

        

          

            

              HTML template outputs will appear here when running template demos.
            

          

        

      


      
      

        

          🧭 Go Execution Lab
          Mermaid
        

        

          

            
            
            Static graph · click a function to navigate
          

          

          
          

            

              
              
              
              
              
              
              
            

            
Not running

            
          


          

            
Analyze the current code to build its Mermaid call graph.

          

          
        

      


      
      

        

          ✨ nanoGo AI
          Local config
        

        

          

            Connection & privacy
            

              
              
              
            

            
            
nanoGo sends nothing until you ask. This browser calls the configured OpenAI-compatible endpoint directly; normal CORS rules apply.

          

          

            
Ask for an explanation, a test, a refactor, or a focused patch. Code blocks can be applied to the editor after review.

          

          

            
            
          

        

      


      
      

        

          🔎 Symbol details
          Editor
        

        

          

            
            Inspect code in place
            
Click a variable or function in the editor. Functions show callers and callees; variables show the last value observed during a run.

          

        

      


      
      

        

          🔬 Execution Inspector
          Details
        

        

          

            
–total time

            
–interp time

            
–steps

            
–steps/ms

          


          

            📁 SDK / Workspace 
            

              
              Multi-file VFS, go.mod and package graph
            

            

              
The active file runs directly. Add a second .go file to enable module-aware execution.

            

          


          

            🌳 AST 
            

              
              Click a node to jump to its source line.
            

            

          


          

            📞 Functions 
            

              
              

                
                
              

              Who calls whom — click a function, a call, or a caller to jump to it.
            

            

            
          


          

            📊 Benchmark 
            

              
              
              Runs the whole program N× on a fresh interpreter; output is suppressed.
            

            

          


          

            🧭 Trace 
            

              
              Calls, goroutines, capability checks — timeline of the last traced run.
            

            

          


          

            🔥 Heatmap 
            

              
              
              Darker = executed more often. Benchmark accumulates hits across all its iterations.