SignalR Error loading hubs. How to handle when service is down -

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I have a signal r application that is self hosted Windows service Hub .

My JavaScript client is in index.html: 

  & lt; Script src = "http: // localhost: 8080 / signalr / hubs" & gt; & Lt; / Script & gt;   
 But the Windows service is not always running, so if this is not running and I try to load index.html then I get the error:  
  Unwanted error: Signal R: Error loading hub. Make sure your center reference is correct, e.g. & Lt; Script src = '/ signalr / js' & gt; & Lt; / Script & gt;   
 It makes sense because it does not search for the Javascript file until the Windows service is running.  
 So my question is, how can I make it flexible,   
 
 
  $ .getScript ("http: // localhost: 8080 / signalr / hubs") .done (script), textstats) {});

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