🤖 Merge PR DefinitelyTyped#73320 [elm] refactor into an ESM .d.ts by @lishaduck

Author: lishaduck

types/elm/elm-tests.ts

@@ -1,8 +1,10 @@
+import { ElmApp, ElmInstance, ElmMain, ElmModule, PortFromElm, PortToElm } from "elm";
+
 declare global {
     var Elm: ElmInstance<{}, {}>;
 }
 
-Elm.Main.init();
+(Elm.Main satisfies ElmMain<{}, {}>).init() satisfies ElmApp<{}>;
 
 // https://gist.github.com/evancz/8521339
 declare var Shanghai: ElmModule<

types/elm/index.d.ts

@@ -1,4 +1,4 @@
-interface ElmModule<
+export interface ElmModule<
     P,
     F,
     Entrypoints extends string[] =
@@ -8,7 +8,7 @@ interface ElmModule<
     Elm: ElmInstance<P, F, Entrypoints>;
 }
 
-type ElmInstance<
+export type ElmInstance<
     P,
     F,
     // eslint-disable-next-line @definitelytyped/no-single-element-tuple-type
@@ -21,19 +21,21 @@ type NestedEntrypoints<Entrypoints extends string[], P, F> = Entrypoints extends
 ] ? { [K in First]: NestedEntrypoints<Rest, P, F> }
     : ElmMain<P, F>;
 
-interface ElmMain<P, F> {
+export interface ElmMain<P, F> {
     init(options?: { node?: Node | undefined; flags: F } | undefined): ElmApp<P>;
 }
 
-interface ElmApp<P> {
+export interface ElmApp<P> {
     ports: P;
 }
 
-interface PortToElm<V> {
+export interface PortToElm<V> {
     send(value: V): void;
 }
 
-interface PortFromElm<V> {
+export interface PortFromElm<V> {
     subscribe(handler: (value: V) => void): void;
     unsubscribe(handler: (value: V) => void): void;
 }
+
+export {};

types/elm/package.json

@@ -2,6 +2,7 @@
     "private": true,
     "name": "@types/elm",
     "version": "0.19.9999",
+    "type": "module",
     "projects": [
         "http://elm-lang.org"
     ],