diff --git a/README.md b/README.md
index e1eb738f..2edb2081 100644
--- a/README.md
+++ b/README.md
@@ -277,7 +277,7 @@ Whether character is entered.
 
 improve shake when page scroll bar hidden
 
-`switchScrollingEffect` change body style, and add a class `switch-scrolling-effect` when called, so if you page look abnormal, please check this
+`switchScrollingEffect` change body style, and add a class `ant-scrolling-effect` when called, so if you page look abnormal, please check this
 
 ```js
 import switchScrollingEffect from "./src/switchScrollingEffect";
diff --git a/src/switchScrollingEffect.js b/src/switchScrollingEffect.js
index 9b2f2681..1263ee7f 100644
--- a/src/switchScrollingEffect.js
+++ b/src/switchScrollingEffect.js
@@ -17,7 +17,7 @@ export default close => {
   }
 
   // https://github.com/ant-design/ant-design/issues/19729
-  const scrollingEffectClassName = 'switch-scrolling-effect';
+  const scrollingEffectClassName = 'ant-scrolling-effect';
   const scrollingEffectClassNameReg = new RegExp(
     `${scrollingEffectClassName}`,
     'g',
@@ -41,7 +41,8 @@ export default close => {
       width: `calc(100% - ${scrollBarSize}px)`,
     });
     if (!scrollingEffectClassNameReg.test(bodyClassName)) {
-      document.body.className = `${bodyClassName} ${scrollingEffectClassName}`;
+      const addClassName = `${bodyClassName} ${scrollingEffectClassName}`;
+      document.body.className = addClassName.trim();
     }
   }
 };
diff --git a/tests/switchScrollingEffect.test.ts b/tests/switchScrollingEffect.test.ts
index e7ccaf96..9f7fd07c 100644
--- a/tests/switchScrollingEffect.test.ts
+++ b/tests/switchScrollingEffect.test.ts
@@ -2,7 +2,9 @@ import switchScrollingEffect from '../src/switchScrollingEffect';
 import { spyElementPrototypes } from '../src/test/domHook';
 import getScrollBarSize from '../src/getScrollBarSize';
 
-jest.mock('../src/getScrollBarSize', () => jest.fn().mockImplementation(() => 20));
+jest.mock('../src/getScrollBarSize', () =>
+  jest.fn().mockImplementation(() => 20),
+);
 
 /**
  * Jest dom default window innerWidth is 1024, innerHeight is 768
@@ -35,7 +37,7 @@ describe('switchScrollingEffect', () => {
     switchScrollingEffect();
 
     expect(document.body.style.cssText).toBe('position: relative;');
-    expect(document.body.className).toBe(' switch-scrolling-effect');
+    expect(document.body.className).toBe('ant-scrolling-effect');
 
     // when closed
     switchScrollingEffect(true);