From 55a4a69491f2e69521fe83bff0d03afd6da0e051 Mon Sep 17 00:00:00 2001
From: Joshua Lochner <admin@xenova.com>
Date: Tue, 5 Mar 2024 17:03:25 +0200
Subject: [PATCH] Check for existence of `onnx_env.wasm` before updating
 wasmPaths (#621)

---
 src/env.js | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/src/env.js b/src/env.js
index e4e6e28..a912dbe 100644
--- a/src/env.js
+++ b/src/env.js
@@ -53,14 +53,15 @@ const localModelPath = RUNNING_LOCALLY
     ? path.join(__dirname, DEFAULT_LOCAL_MODEL_PATH)
     : DEFAULT_LOCAL_MODEL_PATH;
 
-// Set path to wasm files. This is needed when running in a web worker.
-// https://onnxruntime.ai/docs/api/js/interfaces/Env.WebAssemblyFlags.html#wasmPaths
-// We use remote wasm files by default to make it easier for newer users.
-// In practice, users should probably self-host the necessary .wasm files.
-onnx_env.wasm.wasmPaths = RUNNING_LOCALLY
-    ? path.join(__dirname, '/dist/')
-    : `https://cdn.jsdelivr.net/npm/@xenova/transformers@${VERSION}/dist/`;
-
+if (onnx_env?.wasm) {
+    // Set path to wasm files. This is needed when running in a web worker.
+    // https://onnxruntime.ai/docs/api/js/interfaces/Env.WebAssemblyFlags.html#wasmPaths
+    // We use remote wasm files by default to make it easier for newer users.
+    // In practice, users should probably self-host the necessary .wasm files.
+    onnx_env.wasm.wasmPaths = RUNNING_LOCALLY
+        ? path.join(__dirname, '/dist/')
+        : `https://cdn.jsdelivr.net/npm/@xenova/transformers@${VERSION}/dist/`;
+}
 
 /**
  * Global variable used to control execution. This provides users a simple way to configure Transformers.js.