You can do something like this:

defmodule MyAppWeb.SomeComponent do
  @doc false
  def __colocated_constants__(assigns) do
    ~H"""
    <script :type={Phoenix.LiveView.ColocatedJS} name="SharedFoo" key="constants">
      const constants = {
        FOO: "foo",
        BAR: "bar",
      }
      export default constants;
    </script>
    """
  end

  def my_component(assigns) do
    ~H"""
    <script :type={Phoenix.LiveView.ColocatedHook} name=".MyHook">
      import { constants } from "phoenix-colocated/my_app";

      export default {
        mounted() {
          this.el.innerText = JSON.stringify(constants);
        }
      }
    </script>

    <div id="some-id" phx-hook=".MyHook"></div>
    """
  end
end

In this example, the constants are available as constants.SharedFoo:

// constants
{"SharedFoo":{"FOO":"foo","BAR":"bar"}}

PS: No need to ping us individually, I’m subscribed to the Proposals section.

Yeah it builds just fine, but I assume you got an exception in the browser like

Uncaught TypeError: can't access property "SharedFoo", imp_mnxw443umfxhi4y is undefined

That would already have put me on the right track

Anyway, please report back if you find any other issues!

Yep, it works! Thank you so much for this one. You’ve got a lunch from me if you ever come visit Pula, Croatia (or any other place in the region of Istria).