chore: ts at comments

Author: drudrum

src/index.js

@@ -45,7 +45,7 @@ const noop = () => {};
  */
 
 /**
- * @typedef {Compiler["outputFileSystem"] & { createReadStream?: import("fs").createReadStream, statSync?: import("fs").statSync, lstat?: import("fs").lstat, readFileSync?: import("fs").readFileSync }} OutputFileSystem
+ * @typedef {Compiler["outputFileSystem"] & { createReadStream?: import("fs").createReadStream, statSync?: import("fs").statSync, lstat?: import("fs").lstat, existsSync?: import("fs").existsSync, readFileSync?: import("fs").readFileSync }} OutputFileSystem
  */
 
 /** @typedef {ReturnType<Compiler["getInfrastructureLogger"]>} Logger */
@@ -88,6 +88,7 @@ const noop = () => {};
  * @property {boolean} [serverSideRender]
  * @property {OutputFileSystem} [outputFileSystem]
  * @property {boolean | string} [index]
+ * @property {boolean | undefined} [historyApiFallback]
  */
 
 /**

src/utils/getFilenameFromUrl.js

@@ -96,6 +96,7 @@ function getFilenameFromUrl(context, url) {
       }
 
       if (
+        context.outputFileSystem.existsSync &&
         !context.outputFileSystem.existsSync(filename) &&
         options.historyApiFallback
       ) {

types/index.d.ts

@@ -66,6 +66,7 @@ export = wdm;
  * @property {boolean} [serverSideRender]
  * @property {OutputFileSystem} [outputFileSystem]
  * @property {boolean | string} [index]
+ * @property {boolean | undefined} [historyApiFallback]
  */
 /**
  * @template {IncomingMessage} RequestInternal