diff --git a/README.md b/README.md
index 11dc72b..a9a2e56 100644
--- a/README.md
+++ b/README.md
@@ -550,6 +550,17 @@ config.resolve.extensions
   .clear()
 ```
 
+#### Config resolve extensionAlias
+
+```js
+config.resolve.extensionAlias : ChainedSet
+
+config.resolve.extensionAlias
+  .add(value)
+  .prepend(value)
+  .clear()
+```
+
 #### Config resolve mainFields
 
 ```js
diff --git a/src/Resolve.js b/src/Resolve.js
index 5e0382f..641daae 100644
--- a/src/Resolve.js
+++ b/src/Resolve.js
@@ -8,6 +8,7 @@ const childSets = [
   'conditionNames',
   'descriptionFiles',
   'extensions',
+  'extensionAlias',
   'mainFields',
   'mainFiles',
   'exportsFields',
diff --git a/test/Resolve.js b/test/Resolve.js
index 254d5e6..3aab8da 100644
--- a/test/Resolve.js
+++ b/test/Resolve.js
@@ -199,7 +199,7 @@ test('tsConfig object', () => {
   resolve.tsConfig({
     configFile: './tsconfig.json',
     references: 'auto',
-  })
+  });
   expect(resolve.toConfig()).toStrictEqual({
     tsConfig: {
       configFile: './tsconfig.json',
@@ -207,3 +207,13 @@ test('tsConfig object', () => {
     },
   });
 });
+
+test('extensionAlias', () => {
+  const resolve = new Resolve();
+  const instance = resolve.extensionAlias.add('.ts').add('.js').end();
+
+  expect(instance).toBe(resolve);
+  expect(resolve.toConfig()).toStrictEqual({
+    extensionAlias: ['.ts', '.js'],
+  });
+});
diff --git a/types/index.d.ts b/types/index.d.ts
index 3886229..c31f6a4 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -356,6 +356,7 @@ declare namespace Config {
       RspackResolve['descriptionFiles'][number]
     >;
     extensions: TypedChainedSet<this, RspackResolve['extensions'][number]>;
+    extensionAlias: TypedChainedSet<this, RspackResolve['extensionAlias'][number]>;
     mainFields: TypedChainedSet<this, RspackResolve['mainFields'][number]>;
     mainFiles: TypedChainedSet<this, RspackResolve['mainFiles'][number]>;
     exportsFields: TypedChainedSet<