fix: 🐛 transforming typescript without a tsconfig.json file

sveltejs · Oct 31, 2019 · 7edb18a · 7edb18a
1 parent e1b469b
commit 7edb18a
Showing 1 changed file with 12 additions and 6 deletions.
diff --git a/src/transformers/typescript.ts b/src/transformers/typescript.ts
@@ -181,14 +181,20 @@ const transformer: Transformer<Options.Typescript> = ({
       dirname(filename)) as string;
     const tsconfigFile = (options.tsconfigFile ||
       ts.findConfigFile(fileDirectory, ts.sys.fileExists)) as string;
-    basePath = dirname(tsconfigFile);
 
-    const { error, config } = ts.readConfigFile(tsconfigFile, ts.sys.readFile);
-    if (error) {
-      throw new Error(formatDiagnostics(error, basePath));
-    }
+    if (tsconfigFile) {
+      basePath = dirname(tsconfigFile);
+
+      const { error, config } = ts.readConfigFile(
+        tsconfigFile,
+        ts.sys.readFile,
+      );
+      if (error) {
+        throw new Error(formatDiagnostics(error, basePath));
+      }
 
-    Object.assign(compilerOptionsJSON, config.compilerOptions);
+      Object.assign(compilerOptionsJSON, config.compilerOptions);
+    }
   }
 
   Object.assign(compilerOptionsJSON, options.compilerOptions);