The Temple HTML engine makes it possible to use Temple with Phoenix controllers.

To get started, you will configure Phoenix to use this module for .exs files.

# config.exs
config :phoenix, :template_engines,
  # this will work for files named like `index.html.exs`
  exs: Temple.Engine

# config/dev.exs
config :your_app, YourAppWeb.Endpoint,
  live_reload: [
    patterns: [
      ~r"lib/myapp_web/(live|views)/.*(ex|exs|lexs)$",
      ~r"lib/myapp_web/templates/.*(eex|exs|lexs)$"
    ]
  ]

# my_app/
#   lib/
#     my_app/
#     my_app_web/
#       templates/
#         posts/
#           show.html.exs

Now you can get started by writing exs files in the templates directory and they will be compiled as you would expect.