diff --git a/languages/js/sdk-internal/index.js b/languages/js/sdk-internal/index.js
index 0525f7aa..dcc7206f 100644
--- a/languages/js/sdk-internal/index.js
+++ b/languages/js/sdk-internal/index.js
@@ -1,8 +1,37 @@
+// https://stackoverflow.com/a/47880734
+const supported = (() => {
+  try {
+    if (typeof WebAssembly === "object" && typeof WebAssembly.instantiate === "function") {
+      const module = new WebAssembly.Module(
+        Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00),
+      );
+      if (module instanceof WebAssembly.Module) {
+        return new WebAssembly.Instance(module) instanceof WebAssembly.Instance;
+      }
+    }
+  } catch (e) {}
+  return false;
+})();
+
 import { __wbg_set_wasm } from "./bitwarden_wasm_internal_bg.js";
 
-// In order to support a fallback strategy for web we need to conditionally load the wasm file
-export function init(wasm) {
-  __wbg_set_wasm(wasm);
+let loaded_wasm;
+
+export async function init(wasm) {
+  if (loaded_wasm) {
+    return;
+  }
+
+  // If the caller provided a wasm module, use it for backwards compatibility.
+  if (wasm) {
+    loaded_wasm = wasm;
+  } else if (supported) {
+    loaded_wasm = await import("./bitwarden_wasm_internal_bg.wasm");
+  } else {
+    loaded_wasm = await import("./bitwarden_wasm_internal_bg.wasm.js");
+  }
+
+  __wbg_set_wasm(loaded_wasm);
 }
 
 export * from "./bitwarden_wasm_internal_bg.js";
diff --git a/languages/js/sdk-internal/package.json b/languages/js/sdk-internal/package.json
index 29e5c5a5..acc37495 100644
--- a/languages/js/sdk-internal/package.json
+++ b/languages/js/sdk-internal/package.json
@@ -13,11 +13,12 @@
     "node/bitwarden_wasm_internal_bg.wasm",
     "node/bitwarden_wasm_internal_bg.wasm.d.ts",
     "node/bitwarden_wasm_internal.d.ts",
-    "node/bitwarden_wasm_internal.js"
+    "node/bitwarden_wasm_internal.js",
+    "types.d.ts"
   ],
   "main": "node/bitwarden_wasm_internal.js",
   "module": "index.js",
-  "types": "bitwarden_wasm_internal.d.ts",
+  "types": "types.d.ts",
   "scripts": {},
   "sideEffects": [
     "./bitwarden_wasm_internal.js"
diff --git a/languages/js/sdk-internal/types.d.ts b/languages/js/sdk-internal/types.d.ts
new file mode 100644
index 00000000..e11ed53a
--- /dev/null
+++ b/languages/js/sdk-internal/types.d.ts
@@ -0,0 +1,3 @@
+export * from "./bitwarden_wasm_internal";
+
+export function init(module?: any): Promise<void>;