diff --git a/common/changes/@visactor/vscale/fix-identity-scale_2023-08-29-08-09.json b/common/changes/@visactor/vscale/fix-identity-scale_2023-08-29-08-09.json
new file mode 100644
index 0000000..3f0e84b
--- /dev/null
+++ b/common/changes/@visactor/vscale/fix-identity-scale_2023-08-29-08-09.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix(vscale): identity scale may have no domain\n\n",
+      "type": "none",
+      "packageName": "@visactor/vscale"
+    }
+  ],
+  "packageName": "@visactor/vscale",
+  "email": "dingling112@gmail.com"
+}
\ No newline at end of file
diff --git a/packages/vscale/__tests__/identity-scale.test.ts b/packages/vscale/__tests__/identity-scale.test.ts
index 66d3c55..94f005d 100644
--- a/packages/vscale/__tests__/identity-scale.test.ts
+++ b/packages/vscale/__tests__/identity-scale.test.ts
@@ -3,6 +3,8 @@ import { IdentityScale } from '../src/identity-scale';
 test('IdentityScale of any values', () => {
   const scale = new IdentityScale();
 
+  expect(scale.domain()).toBeUndefined();
+  expect(scale.range()).toBeUndefined();
   expect(scale.scale('x')).toBe('x');
   expect(scale.scale(12)).toBe(12);
 });
diff --git a/packages/vscale/src/identity-scale.ts b/packages/vscale/src/identity-scale.ts
index f6f4063..d205889 100644
--- a/packages/vscale/src/identity-scale.ts
+++ b/packages/vscale/src/identity-scale.ts
@@ -54,7 +54,7 @@ export class IdentityScale implements IBaseScale {
   domain(_: any[]): this;
   domain(_?: any[]): this | any {
     if (!_) {
-      return this._domain.slice();
+      return this._domain ? this._domain.slice() : undefined;
     }
     this._domain = _;
 
@@ -65,7 +65,7 @@ export class IdentityScale implements IBaseScale {
   range(_: any[]): this;
   range(_?: any[]): this | any {
     if (!_) {
-      return this._domain.slice();
+      return this._domain ? this._domain.slice() : undefined;
     }
 
     return this;