diff --git a/.github/workflows/typescript-tests.yml b/.github/workflows/typescript-tests.yml
index 26c98501..88f186c5 100644
--- a/.github/workflows/typescript-tests.yml
+++ b/.github/workflows/typescript-tests.yml
@@ -109,9 +109,27 @@ jobs:
         with:
           node-version: '20'
 
+      - name: Build rustlib for standalone_app
+        working-directory: rustlib
+        run: |
+          curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+          wasm-pack build --target web
+
       - name: Setup tslib
         run: make tslib
 
+      - name: Build standalone_app for vscode extension
+        working-directory: standalone_app
+        run: |
+          npm install
+          npm run build:vscode
+
+      - name: Build standalone_app for GitHub pages
+        working-directory: standalone_app
+        run: |
+          npm install
+          npx vite build --out-dir ./gh-pages
+
       - name: Build bundle.js
         working-directory: optuna_dashboard
         run: |
diff --git a/standalone_app/webpack.config.js b/standalone_app/webpack.config.js
index 4c599a49..ed589617 100644
--- a/standalone_app/webpack.config.js
+++ b/standalone_app/webpack.config.js
@@ -36,6 +36,12 @@ module.exports = {
                 test: /\.wasm$/,
                 type: "asset/inline",
             },
+            {
+                test: /\.m?js/,
+                resolve: {
+                    fullySpecified: false
+                }
+            }
         ]
     },
     resolve: {