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fix(react-progress): add subtle animation for indeterminate progress bar when reduced motion mode is enabled #34667

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fix(react-progress): add subtle animation for indeterminate progress bar when reduced motion mode is enabled #34667

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2ca8bfd
fix(react-progress): add subtle animation for indetermintate progress…
dmytrokirpa Jun 17, 2025
5621c01
change
dmytrokirpa Jun 17, 2025
942dcae
Merge branch 'master' into fix/progress-bar-reduced-motion-animation
dmytrokirpa Jun 19, 2025
b33d7f1
Merge branch 'master' into fix/progress-bar-reduced-motion-animation
dmytrokirpa Jun 20, 2025
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7 changes: 7 additions & 0 deletions change/@fluentui-react-progress-4314d015-0a93-40af-abb9-0fa3d9ec86cb.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
{
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@github-actions github-actions bot Jun 17, 2025 •
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🕵🏾‍♀️ visual changes to review in the Visual Change Report

vr-tests-react-components/Positioning 2 screenshots
Image Name Diff(in Pixels) Image Type
vr-tests-react-components/Positioning.Positioning end.chromium.png 924 Changed
vr-tests-react-components/Positioning.Positioning end.updated 2 times.chromium.png 913 Changed
vr-tests-react-components/Skeleton converged 1 screenshots
Image Name Diff(in Pixels) Image Type
vr-tests-react-components/Skeleton converged.Opaque Skeleton with square - Dark Mode.default.chromium.png 4 Changed

"type": "patch",
"comment": "fix: add subtle animation for indeterminate progress bar when reduced motion mode is enabled",
"packageName": "@fluentui/react-progress",
"email": "[email protected]",
"dependentChangeType": "patch"
}
18 changes: 16 additions & 2 deletions ...mponents/react-progress/library/src/components/ProgressBar/useProgressBarStyles.styles.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,18 @@ const indeterminateProgressBar = {
},
};

const indeterminateProgressBarReducedMotion = {
'0%': {
opacity: '.2',
},
'50%': {
opacity: '1',
},
'100%': {
opacity: '.2',
},
};

/**
* Styles for the root slot
*/
Expand Down Expand Up @@ -84,8 +96,10 @@ const useBarStyles = makeStyles({
animationTimingFunction: 'linear',
animationIterationCount: 'infinite',
'@media screen and (prefers-reduced-motion: reduce)': {
animationDuration: '0.01ms',
animationIterationCount: '1',
maxWidth: '100%',
animationIterationCount: 'infinite',
animationDuration: '3s',
animationName: indeterminateProgressBarReducedMotion,
},
},

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