anchor.diff:    Routers can take advantage of this exception by composing in-application route
     URLs with hashes.  Here's a "hash URL" that routes to the *Crisis Center*
   
  -code-example(format=".", language="bash").
  +code-example(format="nocode").
     localhost:3002/src/#/crisis-center/
   
   :marked
  
positive.code: 
    Here's the *Crisis Center* URL in this "HTML 5 pushState" style:
  
  code-example(format=".", language="bash").
    localhost:3002/crisis-center/
  
  :marked
  
negative.code: 
    Those developers may still use HTML 5 URLs by taking two remedial steps:
  
    1. Provide the router with an appropriate [APP_BASE_HREF][] value.
    1. Use _root URLs_ for all web resources: css, images, scripts, and template html files.
  
    [APP_BASE_HREF]: ../api/common/index/APP_BASE_HREF-let.html
  
  :marked
    ### *HashLocationStrategy*
  