fix: add ref() and unref() to chokidar.d.ts for typescript build to w…

…ork (#15706)

packages/vite/src/node/watch.ts

@@ -45,6 +45,14 @@ class NoopWatcher extends EventEmitter implements FSWatcher {
  return {}
  }
 
+ ref() {
+ return this
+ }
+
+ unref() {
+ return this
+ }
+
  async close() {
  // noop
  }

packages/vite/src/types/chokidar.d.ts

@@ -40,6 +40,19 @@ export class FSWatcher extends EventEmitter implements fs.FSWatcher {
  */
  constructor(options?: WatchOptions)
 
+ /**
+ * When called, requests that the Node.js event loop not exit so long as the fs.FSWatcher is active.
+ * Calling watcher.ref() multiple times will have no effect.
+ */
+ ref(): this
+
+ /**
+ * When called, the active fs.FSWatcher object will not require the Node.js event loop to remain active.
+ * If there is no other activity keeping the event loop running, the process may exit before the fs.FSWatcher object's callback is invoked.
+ * Calling watcher.unref() multiple times will have no effect.
+ */
+ unref(): this
+
  /**
  * Add files, directories, or glob patterns for tracking. Takes an array of strings or just one
  * string.