EEx.function_from_file for Heex

Questions & Help Questions
, ,
12

Yes it works. To summarize what to do to use LV 0.18-HTMLEngine as a template engine:

# mix.exs / deps
[
  {:jason, "~> 1.4.0"},
  {:phoenix_live_view, "~> 0.18"}
]

# config.exs
import Config
# only to make Phoenix happy
config :phoenix, :json_library, Jason

# sample.ex
defmodule Sample do
  require EEx

  source = "sample.html.heex"

  EEx.function_from_file(
    :def,
    :sample,
    source,
    [:assigns],
    engine: Phoenix.LiveView.HTMLEngine,
    caller: __ENV__,
    source: source
  )

  def render(assigns) do
    sample(assigns) |> Phoenix.HTML.Safe.to_iodata() |> to_string()
  end

  def render_to_file(path, assigns) do
   # writing to a file does not need to_string
   sample(assigns)
   |> Phoenix.HTML.Safe.to_iodata()
   |> then(fn data -> File.write!(path, data) end)
  end
end

# my_component.ex
defmodule MyComponent do
  use Phoenix.Component

  def greet(assigns) do
    ~H"""
    <p>Hello, <%= assigns.name %></p>
    """
  end
end

# sample.html.heex
<MyComponent.greet name={@name} />

# iex(1)> Sample.render(%{name: "World"})
# "<p>Hello, World</p>"