diff --git a/src/components/Resizable.tsx b/src/components/Resizable.tsx
index 29a8acc..2c31bf5 100644
--- a/src/components/Resizable.tsx
+++ b/src/components/Resizable.tsx
@@ -1,10 +1,11 @@
 import { HorizontalResizeHandler } from 'components/ResizeHandler'
 import { useConfigs } from 'containers/ConfigsContext'
 import * as React from 'react'
-import { useWindowSize } from 'react-use'
+import { useDebounce, useWindowSize } from 'react-use'
 import { cx } from 'utils/cx'
 import { setResizingState } from 'utils/DOMHelper'
 import * as features from 'utils/features'
+import { useCSSVariable } from './useCSSVariable'
 
 export type Size = number
 type Props = {
@@ -34,10 +35,8 @@ export function Resizable({ baseSize, className, children }: React.PropsWithChil
     return () => clearTimeout(timer)
   }, [width, size])
 
-  React.useEffect(() => {
-    document.documentElement.style.setProperty('--gitako-width', size + 'px')
-    configContext.set({ sideBarWidth: size })
-  }, [size])
+  useCSSVariable('--gitako-width', `${size}px`)
+  useDebounce(() => configContext.set({ sideBarWidth: size }), 100, [size])
 
   const onResize = React.useCallback((size: number) => {
     if (size < window.innerWidth - MINIMAL_CONTENT_VIEWPORT_WIDTH) setSize(size)
diff --git a/src/components/useCSSVariable.tsx b/src/components/useCSSVariable.tsx
new file mode 100644
index 0000000..889a774
--- /dev/null
+++ b/src/components/useCSSVariable.tsx
@@ -0,0 +1,11 @@
+import { useLayoutEffect } from 'react'
+
+export function useCSSVariable(
+  name: string,
+  value: string,
+  element: HTMLElement = document.documentElement,
+) {
+  useLayoutEffect(() => {
+    element.style.setProperty(name, value)
+  }, [name, value, element])
+}