1e41f4b71Sopenharmony_ci# ArkUI Subsystem Changelog 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci## cl.arkui.1 Change in Processing for When scrollBar of the \<List> Component Is Set to undefined or an Invalid Value 4e41f4b71Sopenharmony_ci 5e41f4b71Sopenharmony_ci**Change Impact** 6e41f4b71Sopenharmony_ci 7e41f4b71Sopenharmony_ciIn versions earlier than OpenHarmony_4.0.10.1, the following values evaluate to **BarState.Off**: **scrollBar(undefined)**, **scrollBar('aaa')**, **scrollBar(-1)**. 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ciIn OpenHarmony_4.0.10.2 and later versions, the preceding values evaluate to the default value **BarState.Auto**. 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ci**Key API/Component Changes** 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ciThe 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**. 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci## cl.arkui.2 Change in Processing for When scrollBar of the \<Grid> Component Is Set to undefined or an Invalid Value 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci**Change Impact** 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ciIn versions earlier than OpenHarmony_4.0.10.1, the following values evaluate to the default value **BarState.Off**: **scrollBar(undefined)**, **scrollBar('aaa')**, **scrollBar(-1)**. 20e41f4b71Sopenharmony_ci 21e41f4b71Sopenharmony_ciIn OpenHarmony_4.0.10.2 and later versions, the preceding values evaluate to **BarState.Auto**. 22e41f4b71Sopenharmony_ci 23e41f4b71Sopenharmony_ci**Key API/Component Changes** 24e41f4b71Sopenharmony_ci 25e41f4b71Sopenharmony_ciThe 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**. 26