Julius script type module support

[jmorag]

Is there a way for julius files to be emitted with <script type="module"> tags? As far as I can tell from these instances:

instance render ~ RY site => ToWidgetHead site (render -> Javascript) where
    toWidgetHead j = toWidgetHead $ \r -> H.script $ preEscapedLazyText $ renderJavascriptUrl r j
instance ToWidgetHead site Javascript where
    toWidgetHead j = toWidgetHead $ \_ -> H.script $ preEscapedLazyText $ renderJavascript j

it isn't possible without defining a newtype over Javascript or something. In any case, it would be nice to be able to use something like preact/htm with variable interpolation this way. I can attempt a PR to add jsModule/juliusModule/jsFileModule/etc. quasiquoters but I figured I'd gauge interest and feasibility here before going ahead with that.

[snoyberg]

Currently you'd have to do some legwork involving rendering the Julius to text and then embedding it inside a Hamlet tag. I'm definitely open to a PR to add some direct support for this workflow.

[JohnnyCrazy]

Is there any workaround for supporting javascript modules at the moment?

I have a simple games.mjs in my static/js folder and loading it via the below code obviously fails because of the missing type=module attribute.

defaultLayout $ do
  addScript (StaticR js_games_mjs)
  $(widgetFile "games")

EDIT

A rather hacky solution is to include it on the bottom of the games.hamlet widget file, but works for me for now:

<script type="module" src=@{StaticR js_games_mjs}>

[jmorag]

@JohnnyCrazy If you don't need any interpolation in your module file, then your workaround is a good idea. I've started working on a version using interpolation here: #1682, but I've run into some issues testing it. I've not had time to work on it in a few weeks but hopefully I can get back to it soon and clean it up so it can be merged.