fix

Author: chenjiahan

packages/core/src/types/config.ts

@@ -76,6 +76,12 @@ export type ToolsHtmlPluginConfig = ConfigChainWithContext<
   }
 >;
 
+// equivalent to import('webpack-merge').merge
+export type WebpackMerge = <Configuration extends object>(
+  firstConfiguration: Configuration | Configuration[],
+  ...configurations: Configuration[]
+) => Configuration;
+
 export type ModifyRspackConfigUtils = ModifyChainUtils & {
   addRules: (rules: RspackRule | RspackRule[]) => void;
   appendRules: (rules: RspackRule | RspackRule[]) => void;
@@ -86,7 +92,7 @@ export type ModifyRspackConfigUtils = ModifyChainUtils & {
     plugins: BundlerPluginInstance | BundlerPluginInstance[],
   ) => void;
   removePlugin: (pluginName: string) => void;
-  mergeConfig: typeof import('webpack-merge').merge;
+  mergeConfig: WebpackMerge;
   rspack: typeof rspack;
 };
 

packages/core/src/types/plugin.ts

@@ -10,6 +10,7 @@ import type {
   NormalizedConfig,
   NormalizedEnvironmentConfig,
   RsbuildConfig,
+  WebpackMerge,
 } from './config';
 import type { RsbuildContext } from './context';
 import type {
@@ -159,7 +160,7 @@ export type ModifyWebpackConfigUtils = ModifyWebpackChainUtils & {
     plugins: WebpackPluginInstance | WebpackPluginInstance[],
   ) => void;
   removePlugin: (pluginName: string) => void;
-  mergeConfig: typeof import('webpack-merge').merge;
+  mergeConfig: WebpackMerge;
 };
 
 export type ModifyWebpackChainFn = (