diff --git a/src/core/environment.ts b/src/core/environment.ts
index 72d0f3349..815379b5a 100644
--- a/src/core/environment.ts
+++ b/src/core/environment.ts
@@ -8,7 +8,7 @@ export const isBrowser = typeof window !== "undefined";
 // -100  0     true    spec compliant
 // 0     100   false   probably Chrome earlier than v85
 // https://github.com/othree/jquery.rtl-scroll-type
-export const hasNegativeOffsetInRtl = /*#__PURE__*/ once(
+export const hasNegativeOffsetInRTL = /*#__PURE__*/ once(
   (scrollable: HTMLElement): boolean => {
     const key = "scrollLeft";
     const prev = scrollable[key];
@@ -20,7 +20,7 @@ export const hasNegativeOffsetInRtl = /*#__PURE__*/ once(
   }
 );
 
-export const isRtlDocument = /*#__PURE__*/ once((): boolean => {
+export const isRTLDocument = /*#__PURE__*/ once((): boolean => {
   // TODO support SSR in rtl
   return isBrowser ? computeStyle(document.body).direction === "rtl" : false;
 });
diff --git a/src/core/scroller.ts b/src/core/scroller.ts
index 8575db488..29afb9a4c 100644
--- a/src/core/scroller.ts
+++ b/src/core/scroller.ts
@@ -1,4 +1,4 @@
-import { hasNegativeOffsetInRtl, isRtlDocument } from "./environment";
+import { hasNegativeOffsetInRTL, isRTLDocument } from "./environment";
 import {
   ACTION_SCROLL,
   ACTION_BEFORE_MANUAL_SCROLL,
@@ -40,13 +40,13 @@ const createOnWheel = (
   }, 50);
 };
 
-const normalizeRtlOffset = (
+const normalizeRTLOffset = (
   rootElement: HTMLElement,
   store: VirtualStore,
   offset: number,
   diff?: boolean
 ): number => {
-  if (hasNegativeOffsetInRtl(rootElement)) {
+  if (hasNegativeOffsetInRTL(rootElement)) {
     return -offset;
   } else {
     return diff ? -offset : store._getScrollOffsetMax() - offset;
@@ -70,8 +70,8 @@ export const createScroller = (
   const scrollToKey = isHorizontal ? "scrollLeft" : "scrollTop";
 
   const normalizeOffset = (offset: number, diff?: boolean): number => {
-    if (isHorizontal && isRtlDocument()) {
-      return normalizeRtlOffset(rootElement!, store, offset, diff);
+    if (isHorizontal && isRTLDocument()) {
+      return normalizeRTLOffset(rootElement!, store, offset, diff);
     }
     return offset;
   };
@@ -203,8 +203,8 @@ export const createWindowScroller = (
   const offsetKey = isHorizontal ? "offsetLeft" : "offsetTop";
 
   const normalizeOffset = (offset: number, diff?: boolean): number => {
-    if (isHorizontal && isRtlDocument()) {
-      return normalizeRtlOffset(rootElement!, store, offset, diff);
+    if (isHorizontal && isRTLDocument()) {
+      return normalizeRTLOffset(rootElement!, store, offset, diff);
     }
     return offset;
   };
@@ -218,7 +218,7 @@ export const createWindowScroller = (
       const getOffsetToWindow = (node: HTMLElement, offset: number): number => {
         const nodeOffset =
           offset +
-          (isHorizontal && isRtlDocument()
+          (isHorizontal && isRTLDocument()
             ? window.innerWidth - node[offsetKey] - node.offsetWidth
             : node[offsetKey]);
 
diff --git a/src/react/ListItem.tsx b/src/react/ListItem.tsx
index cfabe184f..b40c60271 100644
--- a/src/react/ListItem.tsx
+++ b/src/react/ListItem.tsx
@@ -11,7 +11,7 @@ import { useIsomorphicLayoutEffect } from "./useIsomorphicLayoutEffect";
 import { useSelector } from "./useSelector";
 import { ListResizer } from "../core/resizer";
 import { refKey } from "./utils";
-import { isRtlDocument } from "../core/environment";
+import { isRTLDocument } from "../core/environment";
 
 /**
  * Props of customized item component for {@link VList}.
@@ -68,7 +68,7 @@ export const ListItem = memo(
       <Element
         ref={ref}
         style={useMemo((): CSSProperties => {
-          const leftOrRightKey = isRtlDocument() ? "right" : "left";
+          const leftOrRightKey = isRTLDocument() ? "right" : "left";
           const style: CSSProperties = {
             margin: 0,
             padding: 0,
diff --git a/src/react/VGrid.rtl.spec.tsx b/src/react/VGrid.rtl.spec.tsx
index 29ada1bcb..6a0b1d812 100644
--- a/src/react/VGrid.rtl.spec.tsx
+++ b/src/react/VGrid.rtl.spec.tsx
@@ -6,7 +6,7 @@ jest.mock("../core/environment", () => {
   const originalModule = jest.requireActual("../core/environment");
   return {
     ...(originalModule as any),
-    isRtlDocument: () => true,
+    isRTLDocument: () => true,
   };
 });
 
diff --git a/src/react/VGrid.tsx b/src/react/VGrid.tsx
index c967c8196..157ddaff8 100644
--- a/src/react/VGrid.tsx
+++ b/src/react/VGrid.tsx
@@ -37,7 +37,7 @@ import {
 import { createGridResizer, GridResizer } from "../core/resizer";
 import { Viewport as DefaultViewport } from "./Viewport";
 import { flushSync } from "react-dom";
-import { isRtlDocument } from "../core/environment";
+import { isRTLDocument } from "../core/environment";
 
 const genKey = (i: number, j: number) => `${i}-${j}`;
 
@@ -132,7 +132,7 @@ const Cell = memo(
             padding: 0,
             position: "absolute",
             top: top,
-            [isRtlDocument() ? "right" : "left"]: left,
+            [isRTLDocument() ? "right" : "left"]: left,
             visibility: vHide || hHide ? "hidden" : "visible",
             minHeight: height,
             minWidth: width,
diff --git a/src/react/VList.rtl.spec.tsx b/src/react/VList.rtl.spec.tsx
index 0587fab94..28ba87547 100644
--- a/src/react/VList.rtl.spec.tsx
+++ b/src/react/VList.rtl.spec.tsx
@@ -6,7 +6,7 @@ jest.mock("../core/environment", () => {
   const originalModule = jest.requireActual("../core/environment");
   return {
     ...(originalModule as any),
-    isRtlDocument: () => true,
+    isRTLDocument: () => true,
   };
 });
 
diff --git a/src/react/WVList.rtl.spec.tsx b/src/react/WVList.rtl.spec.tsx
index ed412834a..8bced6f10 100644
--- a/src/react/WVList.rtl.spec.tsx
+++ b/src/react/WVList.rtl.spec.tsx
@@ -6,7 +6,7 @@ jest.mock("../core/environment", () => {
   const originalModule = jest.requireActual("../core/environment");
   return {
     ...(originalModule as any),
-    isRtlDocument: () => true,
+    isRTLDocument: () => true,
   };
 });