feat: improved elm template

templates/elm/frontend/src/interop.ts

@@ -0,0 +1,25 @@
+// This returns the flags passed into your Elm application
+export const flags = async ({ env } : ElmLand.FlagsArgs) => {
+  return {}
+}
+
+// This function is called after your Elm app starts
+export const onReady = ({ app, env } : ElmLand.OnReadyArgs) => {
+  console.log('Elm is ready', app)
+}
+
+
+// Type definitions for Elm Land
+namespace ElmLand {
+  export type FlagsArgs = {
+    env: Record<string, string>
+  }
+  export type OnReadyArgs = {
+    env: Record<string, string>
+    app: { ports?: Record<string, Port> }
+  }
+  export type Port = {
+    send?: (data: unknown) => void
+    subscribe?: (callback: (data: unknown) => unknown) => void
+  }
+}