Align extensions for tsconfig-paths with webpack config only if allowJs

vercel · Sep 5, 2019 · 3e37e30 · 3e37e30
1 parent a48bf1f
commit 3e37e30
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/index.js b/src/index.js
@@ -71,9 +71,15 @@ module.exports = (
   // we need to catch here because the plugin will
   // error if there's no tsconfig in the working directory
   try {
-    resolvePlugins.push(new TsconfigPathsPlugin({ silent: true, extensions: SUPPORTED_EXTENSIONS }));
-
     const tsconfig = tsconfigPaths.loadConfig();
+    const fullTsconfig = JSON.parse(fs.readFileSync(tsconfig.configFileAbsolutePath).toString())
+
+    const tsconfigPathsOptions = { silent: true }
+    if (fullTsconfig.compilerOptions.allowJs) {
+      tsconfigPathsOptions.extensions = SUPPORTED_EXTENSIONS
+    }
+    resolvePlugins.push(new TsconfigPathsPlugin(tsconfigPathsOptions));
+
     if (tsconfig.resultType === "success") {
       tsconfigMatchPath = tsconfigPaths.createMatchPath(tsconfig.absoluteBaseUrl, tsconfig.paths);
     }