fix: add wasm browser declarations

Author: BartWaardenburg

packages/sourcemap-wasm/__tests__/browser.test.mjs

@@ -11,6 +11,16 @@ it("exposes the browser API as static ESM exports before initialization", () =>
   assert.equal(typeof wasmMemory, "function");
 });
 
+it("publishes declarations for the browser API", () => {
+  const packageJson = JSON.parse(readFileSync(new URL("../package.json", import.meta.url), "utf8"));
+
+  assert.equal(packageJson.exports["./browser"].types, "./browser/index.d.ts");
+
+  const declarations = readFileSync(new URL("../browser/index.d.ts", import.meta.url), "utf8");
+  assert.match(declarations, /export \{ LazySourceMap, SourceMap, resultPtr, wasmMemory \}/);
+  assert.match(declarations, /Promise<void>/);
+});
+
 it("initializes the generated module only once", async () => {
   const wasm = readFileSync(new URL("../web/srcmap_sourcemap_wasm_bg.wasm", import.meta.url));
 

packages/sourcemap-wasm/browser/index.d.ts

@@ -0,0 +1,9 @@
+import type { InitInput } from "../web/srcmap_sourcemap_wasm.js";
+
+export { LazySourceMap, SourceMap, resultPtr, wasmMemory } from "../web/srcmap_sourcemap_wasm.js";
+
+declare const init: (
+  input?: { module_or_path: InitInput | Promise<InitInput> } | InitInput | Promise<InitInput>,
+) => Promise<void>;
+
+export default init;

packages/sourcemap-wasm/package.json

@@ -43,6 +43,7 @@
       "default": "./coverage.mjs"
     },
     "./browser": {
+      "types": "./browser/index.d.ts",
       "default": "./browser/index.mjs"
     }
   },