init workerd shim

Author: lherman-cs

js/Makefile

@@ -4,6 +4,9 @@ build:
 	$(MAKE) build-target WASM_PATH=$(WASM_PATH) TARGET=experimental-nodejs-module
 	$(MAKE) build-target WASM_PATH=$(WASM_PATH) TARGET=deno
 
+	# shim workerd
+	cp $(ROOT_DIR)/shim-workerd.js $(ROOT_DIR)/pkg-experimental-nodejs-module/
+
 build-target:
 	wasm-bindgen --target $(TARGET) --out-dir $(ROOT_DIR)/pkg-$(TARGET) --typescript $(WASM_PATH)
 	# jsr requires explicit d.ts reference, https://github.com/jsr-io/jsr/issues/370#issuecomment-2044467118

js/package.json

@@ -12,7 +12,8 @@
   "exports": {
     ".": "./pkg-experimental-nodejs-module/pulsebeam_core.js",
     "./node": "./pkg-experimental-nodejs-module/pulsebeam_core.js",
-    "./deno": "./pkg-deno/pulsebeam_core.js"
+    "./deno": "./pkg-deno/pulsebeam_core.js",
+    "./workerd": "./pkg-experimental-nodejs-module/shim-workerd.js"
   },
   "files": [
     "pkg-experimental-nodejs-module",

js/shim-workerd.js

@@ -0,0 +1,19 @@
+// Cloudflare doesn't support URL, import.meta.url, and fs.readFileSync
+// https://github.com/cloudflare/workers-sdk/issues/7265#issuecomment-2480871605
+
+let imports = {};
+import * as import0 from "./pulsebeam_core_bg.js";
+import wasmModule from "./pulsebeam_core_bg.wasm";
+imports["./pulsebeam_core_bg.js"] = import0;
+
+const wasmInstance = await WebAssembly.instantiate(wasmModule, imports);
+const wasm = wasmInstance.exports;
+export const __wasm = wasm;
+
+imports["./pulsebeam_core_bg.js"].__wbg_set_wasm(
+  wasm,
+  wasmModule,
+);
+wasm.__wbindgen_start();
+
+export * from "./pulsebeam_core_bg.js";