Working with splice in Heist

In the previous recipe, we created a template and externally attached bindings to a tag, and rendered the template using these bindings. This is useful when we have simple bindings. But what if we have to do some calculation and bind the calculation to the tag, rather than a simple string binding? In this recipe, we will be binding a tag to the local time on the server (or actually, a place where the template will be rendered).

How to do it...

1. Create a new project, working-with-splice, with a simple stack template:

        stack new working-with-splice simple

2. Add a dependency on the heist library in the build-depends sub-section of the executable section. In addition, also add a dependency on additional libraries required for this recipe. In addition to text, bytestring, lens, and xmlhtml, also add the time library:

 executable working-with-splice
   hs-source-dirs:      src
   main-is:             Main.hs
   default-language:    Haskell2010
   build-depends:    ...