Summary
Two charts class-name prefixes were historically misnamed and shipped to users:
PiecewiseColorLegend emitted MuiPiecewiseColorLegendClasses-* instead of MuiPiecewiseColorLegend-* (the interface name leaked into the prefix).ChartsAxisZoomSliderThumb emitted MuiChartAxisZoomSliderThumb-* instead of MuiChartsAxisZoomSliderThumb-* (missing the s in Charts).
#22674 makes both components render the correct and legacy prefixes on the DOM so existing CSS keeps working while new code can target the right name.
v10 follow-up
Remove the legacy emission:
packages/x-charts/src/ChartsLegend/piecewiseColorLegendClasses.ts — drop the LEGACY_PREFIX constant and emit only MuiPiecewiseColorLegend-*.packages/x-charts-pro/src/ChartsZoomSlider/internals/chartsAxisZoomSliderThumbClasses.ts — drop the LEGACY_PREFIX constant and emit only MuiChartsAxisZoomSliderThumb-*.
Mention the change in the v10 migration notes.
Summary
Two charts class-name prefixes were historically misnamed and shipped to users:
PiecewiseColorLegendemittedMuiPiecewiseColorLegendClasses-*instead ofMuiPiecewiseColorLegend-*(the interface name leaked into the prefix).ChartsAxisZoomSliderThumbemittedMuiChartAxisZoomSliderThumb-*instead ofMuiChartsAxisZoomSliderThumb-*(missing thesinCharts).#22674 makes both components render the correct and legacy prefixes on the DOM so existing CSS keeps working while new code can target the right name.
v10 follow-up
Remove the legacy emission:
packages/x-charts/src/ChartsLegend/piecewiseColorLegendClasses.ts— drop theLEGACY_PREFIXconstant and emit onlyMuiPiecewiseColorLegend-*.packages/x-charts-pro/src/ChartsZoomSlider/internals/chartsAxisZoomSliderThumbClasses.ts— drop theLEGACY_PREFIXconstant and emit onlyMuiChartsAxisZoomSliderThumb-*.Mention the change in the v10 migration notes.