1# ArkUI Subsystem Changelog
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3## cl.arkui.1 Change in Processing for When scrollBar of the \<List> Component Is Set to undefined or an Invalid Value
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5**Change Impact**
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7In versions earlier than OpenHarmony_4.0.10.1, the following values evaluate to **BarState.Off**: **scrollBar(undefined)**, **scrollBar('aaa')**, **scrollBar(-1)**.
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9In OpenHarmony_4.0.10.2 and later versions, the preceding values evaluate to the default value **BarState.Auto**.
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11**Key API/Component Changes**
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13The processing of the **\<List>** component's **scrollBar** attribute, when it is set to **undefined** or an invalid value, is changed from using **BarState.Off** to using **BarState.Auto**.
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15## cl.arkui.2 Change in Processing for When scrollBar of the \<Grid> Component Is Set to undefined or an Invalid Value
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17**Change Impact**
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19In versions earlier than OpenHarmony_4.0.10.1, the following values evaluate to the default value **BarState.Off**: **scrollBar(undefined)**, **scrollBar('aaa')**, **scrollBar(-1)**.
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21In OpenHarmony_4.0.10.2 and later versions, the preceding values evaluate to **BarState.Auto**.
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23**Key API/Component Changes**
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25The processing of the **\<Grid>** component's **scrollBar** attribute, when it is set to **undefined** or an invalid value, is changed from using **BarState.Off** to using **BarState.Auto**.
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