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Editorial Team
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Asked: 2026-05-23T10:07:59+00:00

I can find plenty of documentation on using blitz and other compiletime templating libraries

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I can find plenty of documentation on using blitz and other compiletime templating libraries with happstack but I would like to know how to use html files as templates.

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  1. Editorial Team

    Though there are many options, my favourite would be Heist, which would allow you to define a splice:

    > factSplice :: (Monad m) => TemplateMonad m Template
> factSplice = do
>   input <- getParamNode
>   let text = T.unpack $ X.nodeText input
>       n    = read text :: Int
>   return [X.TextNode $ T.pack $ show $ product [1..n]]
>

    which could be used in a dynamic (loaded at runtime) HTML template:

    <html>
  <head>
    <title>Factorial Page</title>
  </head>
  <body>
    <h1>Factorial Page</h1>
    <p>The factorial of 6 is <fact>6</fact></p>
  </body>
</html>

    To use heist in happstack, you’ll need the happstack-heist package. For more detail and other options, see Using Heist.

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