From e2e7e4489fc4ae6fec1f88c5920029be5f8b2df9 Mon Sep 17 00:00:00 2001
From: 2ws2khc2zh-rgb <292810318+2ws2khc2zh-rgb@users.noreply.github.com>
Date: Thu, 11 Jun 2026 23:59:50 +0800
Subject: [PATCH] Handle Rollup fatal watch events

---
 src/index.ts       | 6 +++++-
 test/index.test.ts | 8 +++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index 2121a089..fc2faa0d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -62,6 +62,10 @@ interface RollupConfigInput {
 type PluginFactory = (opts: any) => RollupPlugin
 type GetPlugin = (name: string) => Promise<PluginFactory>
 
+export function isRollupErrorEvent(e: { code?: string }) {
+  return e.code === 'ERROR' || e.code === 'FATAL'
+}
+
 export class Bundler {
   rootDir: string
   config: NormalizedConfig
@@ -629,7 +633,7 @@ export class Bundler {
       )
       const watcher = watch(configs)
       watcher.on('event', (e) => {
-        if (e.code === 'ERROR') {
+        if (isRollupErrorEvent(e)) {
           logger.error(e.error.message)
         }
       })
diff --git a/test/index.test.ts b/test/index.test.ts
index 1e281a15..dc7315e7 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -1,8 +1,14 @@
 import path from 'path'
-import { Bundler, Config, Options } from '../src'
+import { Bundler, Config, Options, isRollupErrorEvent } from '../src'
 
 process.env.BABEL_ENV = 'anything-not-test'
 
+test('detects rollup watch error events', () => {
+  expect(isRollupErrorEvent({ code: 'ERROR' })).toBe(true)
+  expect(isRollupErrorEvent({ code: 'FATAL' })).toBe(true)
+  expect(isRollupErrorEvent({ code: 'BUNDLE_END' })).toBe(false)
+})
+
 function fixture(...args: string[]) {
   return path.join(__dirname, 'fixtures', ...args)
 }