Remove the CSS module feature flag from SkeletonAvatar SkeletonBox and SkeletonText (#5787)

jonrohan · web-flow · commit 9272a8c4311d · 2025-03-20T21:07:03.000Z
diff --git a/.changeset/young-months-peel.md b/.changeset/young-months-peel.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": minor
+---
+
+Remove the CSS module feature flag from SkeletonAvatar SkeletonBox and SkeletonText
diff --git a/packages/react/src/experimental/Skeleton/FeatureFlag.tsx b/packages/react/src/experimental/Skeleton/FeatureFlag.tsx
diff --git a/packages/react/src/experimental/Skeleton/SkeletonAvatar.tsx b/packages/react/src/experimental/Skeleton/SkeletonAvatar.tsx
@@ -1,36 +1,17 @@
 import React, {type CSSProperties} from 'react'
-import {getBreakpointDeclarations} from '../../utils/getBreakpointDeclarations'
-import {get} from '../../constants'
 import {isResponsiveValue} from '../../hooks/useResponsiveValue'
 import type {AvatarProps} from '../../Avatar'
 import {DEFAULT_AVATAR_SIZE} from '../../Avatar/Avatar'
 import {SkeletonBox} from './SkeletonBox'
 import classes from './SkeletonAvatar.module.css'
 import {clsx} from 'clsx'
-import {useFeatureFlag} from '../../FeatureFlags'
 import {merge} from '../../sx'
-import {CSS_MODULE_FLAG} from './FeatureFlag'
 
 export type SkeletonAvatarProps = Pick<AvatarProps, 'size' | 'square'> & {
   /** Class name for custom styling */
   className?: string
 } & Omit<React.HTMLProps<HTMLDivElement>, 'size'>
 
-const avatarSkeletonStyles = {
-  '&[data-component="SkeletonAvatar"]': {
-    borderRadius: '50%',
-    boxShadow: `0 0 0 1px ${get('colors.avatar.border')}`,
-    display: 'inline-block',
-    lineHeight: get('lineHeights.condensedUltra'),
-    height: 'var(--avatar-size)',
-    width: 'var(--avatar-size)',
-  },
-
-  '&[data-square]': {
-    borderRadius: 'clamp(4px, var(--avatar-size) - 24px, 6px)',
-  },
-}
-
 export const SkeletonAvatar: React.FC<SkeletonAvatarProps> = ({
   size = DEFAULT_AVATAR_SIZE,
   square,
@@ -40,40 +21,23 @@ export const SkeletonAvatar: React.FC<SkeletonAvatarProps> = ({
 }) => {
   const responsive = isResponsiveValue(size)
   const cssSizeVars = {} as Record<string, string>
-  const enabled = useFeatureFlag(CSS_MODULE_FLAG)
-  const avatarSx = responsive
-    ? {
-        ...getBreakpointDeclarations(
-          size,
-          '--avatar-size' as keyof React.CSSProperties,
-          value => `${value || DEFAULT_AVATAR_SIZE}px`,
-        ),
-        ...avatarSkeletonStyles,
-      }
-    : {
-        '--avatar-size': `${size}px`,
-        ...avatarSkeletonStyles,
-      }
 
-  if (enabled) {
-    if (responsive) {
-      for (const [key, value] of Object.entries(size)) {
-        cssSizeVars[`--avatarSize-${key}`] = `${value}px`
-      }
-    } else {
-      cssSizeVars['--avatarSize-regular'] = `${size}px`
+  if (responsive) {
+    for (const [key, value] of Object.entries(size)) {
+      cssSizeVars[`--avatarSize-${key}`] = `${value}px`
     }
+  } else {
+    cssSizeVars['--avatarSize-regular'] = `${size}px`
   }
 
   return (
     <SkeletonBox
-      sx={enabled ? undefined : avatarSx}
-      className={clsx(className, {[classes.SkeletonAvatar]: enabled})}
+      className={clsx(className, classes.SkeletonAvatar)}
       {...rest}
       data-component="SkeletonAvatar"
       data-responsive={responsive ? '' : undefined}
       data-square={square ? '' : undefined}
-      style={merge(style as CSSProperties, enabled ? cssSizeVars : {})}
+      style={merge(style as CSSProperties, cssSizeVars)}
     />
   )
 }
diff --git a/packages/react/src/experimental/Skeleton/SkeletonBox.tsx b/packages/react/src/experimental/Skeleton/SkeletonBox.tsx
@@ -1,13 +1,10 @@
 import React from 'react'
-import styled, {keyframes} from 'styled-components'
-import sx, {merge, type SxProp} from '../../sx'
-import {get} from '../../constants'
-import {type CSSProperties, type HTMLProps} from 'react'
-import {toggleStyledComponent} from '../../internal/utils/toggleStyledComponent'
+import {merge, type SxProp} from '../../sx'
+import {type CSSProperties} from 'react'
 import {clsx} from 'clsx'
 import classes from './SkeletonBox.module.css'
-import {useFeatureFlag} from '../../FeatureFlags'
-import {CSS_MODULE_FLAG} from './FeatureFlag'
+import {defaultSxProp} from '../../utils/defaultSxProp'
+import Box from '../../Box'
 
 type SkeletonBoxProps = {
   /** Height of the skeleton "box". Accepts any valid CSS `height` value. */
@@ -17,62 +14,40 @@ type SkeletonBoxProps = {
   /** The className of the skeleton box */
   className?: string
 } & SxProp &
-  HTMLProps<HTMLDivElement>
-
-const shimmer = keyframes`
-  from { mask-position: 200%; }
-  to { mask-position: 0%; }
-`
-
-const StyledSkeletonBox = toggleStyledComponent(
-  CSS_MODULE_FLAG,
-  'div',
-  styled.div<SkeletonBoxProps>`
-    animation: ${shimmer};
-    display: block;
-    background-color: var(--skeletonLoader-bgColor, ${get('colors.canvas.subtle')});
-    border-radius: 3px;
-    height: ${props => props.height || '1rem'};
-    width: ${props => props.width};
-
-    @media (prefers-reduced-motion: no-preference) {
-      mask-image: linear-gradient(75deg, #000 30%, rgba(0, 0, 0, 0.65) 80%);
-      mask-size: 200%;
-      animation: ${shimmer};
-      animation-duration: 1s;
-      animation-iteration-count: infinite;
-    }
-
-    @media (forced-colors: active) {
-      outline: 1px solid transparent;
-      outline-offset: -1px;
-    }
-
-    ${sx};
-  `,
-)
+  React.ComponentPropsWithoutRef<'div'>
 
 export const SkeletonBox = React.forwardRef<HTMLDivElement, SkeletonBoxProps>(function SkeletonBox(
-  {height, width, className, style, ...props},
+  {height, width, className, style, sx: sxProp = defaultSxProp, ...props},
   ref,
 ) {
-  const enabled = useFeatureFlag(CSS_MODULE_FLAG)
+  if (sxProp !== defaultSxProp) {
+    return (
+      <Box
+        as="div"
+        className={clsx(className, classes.SkeletonBox)}
+        style={merge(
+          style as CSSProperties,
+          {
+            height,
+            width,
+          } as CSSProperties,
+        )}
+        {...props}
+        ref={ref}
+        sx={sxProp}
+      />
+    )
+  }
   return (
-    <StyledSkeletonBox
-      height={enabled ? undefined : height}
-      width={enabled ? undefined : width}
-      className={clsx(className, {[classes.SkeletonBox]: enabled})}
-      style={
-        enabled
-          ? merge(
-              style as CSSProperties,
-              {
-                height,
-                width,
-              } as CSSProperties,
-            )
-          : style
-      }
+    <div
+      className={clsx(className, classes.SkeletonBox)}
+      style={merge(
+        style as CSSProperties,
+        {
+          height,
+          width,
+        } as CSSProperties,
+      )}
       {...props}
       ref={ref}
     />
diff --git a/packages/react/src/experimental/Skeleton/SkeletonText.module.css b/packages/react/src/experimental/Skeleton/SkeletonText.module.css
@@ -63,3 +63,8 @@
     --line-height: var(--text-body-lineHeight-small);
   }
 }
+
+.SkeletonTextWrapper {
+  /* stylelint-disable-next-line primer/spacing */
+  padding-block: 0.1px;
+}
diff --git a/packages/react/src/experimental/Skeleton/SkeletonText.tsx b/packages/react/src/experimental/Skeleton/SkeletonText.tsx
@@ -1,11 +1,8 @@
 import React, {type CSSProperties, type HTMLProps} from 'react'
-import Box from '../../Box'
 import {SkeletonBox} from './SkeletonBox'
 import classes from './SkeletonText.module.css'
-import {useFeatureFlag} from '../../FeatureFlags'
 import {clsx} from 'clsx'
 import {merge} from '../../sx'
-import {CSS_MODULE_FLAG} from './FeatureFlag'
 
 type SkeletonTextProps = {
   /** Size of the text that the skeleton is replacing. */
@@ -18,61 +15,6 @@ type SkeletonTextProps = {
   className?: string
 } & Omit<HTMLProps<HTMLDivElement>, 'size'>
 
-const skeletonTextStyles = {
-  '&[data-component="SkeletonText"]': {
-    '--font-size': 'var(--text-body-size-medium, 0.875rem)',
-    '--line-height': 'var(--text-body-lineHeight-medium, 1.4285)',
-    '--leading': 'calc(var(--font-size) * var(--line-height) - var(--font-size))',
-    borderRadius: 'var(--borderRadius-small, 0.1875rem)',
-    height: 'var(--font-size)',
-    marginBlock: 'calc(var(--leading) / 2)',
-  },
-  '&[data-in-multiline="true"]': {
-    marginBlockEnd: 'calc(var(--leading) * 2)',
-  },
-  '&[data-in-multiline="true"]:last-child': {
-    maxWidth: '65%',
-    minWidth: '50px',
-    marginBottom: 0,
-  },
-  '@supports (margin-block: mod(1px, 1px))': {
-    '&[data-component="SkeletonText"]': {
-      '--leading': 'mod(var(--font-size) * var(--line-height), var(--font-size))',
-    },
-  },
-  '&[data-text-skeleton-size="display"], &[data-text-skeleton-size="titleLarge"]': {
-    borderRadius: 'var(--borderRadius-medium, 0.375rem)',
-  },
-  '&[data-text-skeleton-size="display"]': {
-    '--font-size': 'var(--text-display-size, 2.5rem)',
-    '--line-height': 'var(--text-display-lineHeight, 1.4)',
-  },
-  '&[data-text-skeleton-size="titleLarge"]': {
-    '--font-size': 'var(--text-title-size-large, 2.5rem)',
-    '--line-height': 'var(--text-title-lineHeight-large, 1.5)',
-  },
-  '&[data-text-skeleton-size="titleMedium"]': {
-    '--font-size': 'var(--text-title-size-medium, 1.25rem)',
-    '--line-height': 'var(--text-title-lineHeight-medium, 1.6)',
-  },
-  '&[data-text-skeleton-size="titleSmall"]': {
-    '--font-size': 'var(--text-title-size-small, 1rem)',
-    '--line-height': 'var(--text-title-lineHeight-small, 1.5)',
-  },
-  '&[data-text-skeleton-size="subtitle"]': {
-    '--font-size': 'var(--text-subtitle-size, 1.25rem)',
-    '--line-height': 'var(--text-subtitle-lineHeight, 1.6)',
-  },
-  '&[data-text-skeleton-size="bodyLarge"]': {
-    '--font-size': 'var(--text-body-size-large, 1rem)',
-    '--line-height': 'var(--text-body-lineHeight-large, 1.5)',
-  },
-  '&[data-text-skeleton-size="bodySmall"]': {
-    '--font-size': 'var(--text-body-size-small, 0.75rem)',
-    '--line-height': 'var(--text-body-lineHeight-small, 1.6666)',
-  },
-}
-
 export const SkeletonText: React.FC<SkeletonTextProps> = ({
   lines = 1,
   maxWidth,
@@ -81,52 +23,35 @@ export const SkeletonText: React.FC<SkeletonTextProps> = ({
   style,
   ...rest
 }) => {
-  const enabled = useFeatureFlag(CSS_MODULE_FLAG)
-
   if (lines < 2) {
     return (
       <SkeletonBox
         data-component="SkeletonText"
         data-text-skeleton-size={size}
         width="100%"
-        className={clsx(className, {[classes.SkeletonText]: enabled})}
-        sx={
-          enabled
-            ? {}
-            : {
-                maxWidth,
-                ...skeletonTextStyles,
-              }
-        }
-        style={enabled ? merge(style as CSSProperties, {maxWidth} as CSSProperties) : style}
+        className={clsx(className, classes.SkeletonText)}
+        style={merge(style as CSSProperties, {maxWidth} as CSSProperties)}
         {...rest}
       />
     )
   } else {
     return (
-      <Box
+      <div
         data-component="multilineContainer"
-        sx={{
-          maxWidth,
-          /* The tiny `paddingBlock` prevents margin collapse between the first skeleton line
-           * and a bottom margin above it.
-           */
-          paddingBlock: '0.1px',
-        }}
-        style={enabled ? merge(style as CSSProperties, {maxWidth, paddingBlock: '0.1px'} as CSSProperties) : style}
+        className={classes.SkeletonTextWrapper}
+        style={merge(style as CSSProperties, {maxWidth} as CSSProperties)}
       >
         {Array.from({length: lines}, (_, index) => (
           <SkeletonBox
             key={index}
             data-component="SkeletonText"
             data-in-multiline="true"
             data-text-skeleton-size={size}
-            sx={enabled ? {} : skeletonTextStyles}
-            className={clsx(className, {[classes.SkeletonText]: enabled})}
+            className={clsx(className, classes.SkeletonText)}
             {...rest}
           />
         ))}
-      </Box>
+      </div>
     )
   }
 }
diff --git a/packages/react/src/experimental/Skeleton/__tests__/SkeletonBox.test.tsx b/packages/react/src/experimental/Skeleton/__tests__/SkeletonBox.test.tsx
@@ -1,24 +1,9 @@
 import {render} from '@testing-library/react'
 import React from 'react'
-import {FeatureFlags} from '../../../FeatureFlags'
 import {SkeletonBox} from '../SkeletonBox'
 
 describe('SkeletonBox', () => {
   it('should support `className` on the outermost element', () => {
-    const Element = () => <SkeletonBox className={'test-class-name'} />
-    const FeatureFlagElement = () => {
-      return (
-        <FeatureFlags
-          flags={{
-            primer_react_css_modules_staff: true,
-            primer_react_css_modules_ga: true,
-          }}
-        >
-          <Element />
-        </FeatureFlags>
-      )
-    }
-    expect(render(<Element />).container.firstChild).toHaveClass('test-class-name')
-    expect(render(<FeatureFlagElement />).container.firstChild).toHaveClass('test-class-name')
+    expect(render(<SkeletonBox className={'test-class-name'} />).container.firstChild).toHaveClass('test-class-name')
   })
 })
diff --git a/packages/react/src/experimental/Skeleton/__tests__/SkeletonText.test.tsx b/packages/react/src/experimental/Skeleton/__tests__/SkeletonText.test.tsx
@@ -1,24 +1,9 @@
 import {render} from '@testing-library/react'
 import React from 'react'
-import {FeatureFlags} from '../../../FeatureFlags'
 import {SkeletonText} from '../SkeletonText'
 
 describe('SkeletonText', () => {
   it('should support `className` on the outermost element', () => {
-    const Element = () => <SkeletonText className={'test-class-name'} />
-    const FeatureFlagElement = () => {
-      return (
-        <FeatureFlags
-          flags={{
-            primer_react_css_modules_staff: true,
-            primer_react_css_modules_ga: true,
-          }}
-        >
-          <Element />
-        </FeatureFlags>
-      )
-    }
-    expect(render(<Element />).container.firstChild).toHaveClass('test-class-name')
-    expect(render(<FeatureFlagElement />).container.firstChild).toHaveClass('test-class-name')
+    expect(render(<SkeletonText className={'test-class-name'} />).container.firstChild).toHaveClass('test-class-name')
   })
 })

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"@primer/react": minor
 +---
++
 +Remove the CSS module feature flag from SkeletonAvatar SkeletonBox and SkeletonText
Original file line number	Diff line number	Diff line change
`@@ -63,3 +63,8 @@`
`63`	`63`	`--line-height: var(--text-body-lineHeight-small);`
`64`	`64`	`}`
`65`	`65`	`}`
	`66`	`+`
	`67`	`+.SkeletonTextWrapper {`
	`68`	`+ /* stylelint-disable-next-line primer/spacing */`
	`69`	`+ padding-block: 0.1px;`
	`70`	`+}`