1# ArkUI Subsystem Changelog 2 3## cl.arkui.1 Change in Handling Rules on Negative Values of fontSize for Buttons 4 5**Change Impact** 6 7Before change, a negative value of **fontSize** evaluates to **0**. That is, the text is not displayed. 8 9After change, a negative value of **fontSize** evaluates to the default value **16fp**. 10 11Note: This change does not affect the effect of **fontSize=0**. 12 13## cl.arkui.2 Change in the Search Text Box for When the Attributes of the \<Search> Component Are Dynamically Changed 14 15**Change Impact** 16 17Before change, when **placeholder**, but not **value**, is set for the **\<Search>** component, dynamically changing the component attributes will clear the search text box. 18 19After change, when **placeholder**, but not **value**, is set for the **\<Search>** component, dynamically changing the component attributes will not clear the search text box. 20 21Note: After change, the behavior of the **\<Search>** component is what is expected of the component in normal cases. 22 23## cl.arkui.3 Change in the Width Specification of the \<Menu> Component 24 25Changed the width specification of the [\<Menu>](../../../application-dev/reference/arkui-ts/ts-basic-components-menu.md) component as follows: If the width is not set, the component takes up two columns. If the width is set, the component adapts its content to the set width. 26 27The **\<Menu>** component has a default minimum width of 64 vp. 28 29**Change Impact** 30 311. By default, the menu takes up two columns. If the content of the [\<MenuItem>](../../../application-dev/reference/arkui-ts/ts-basic-components-menuitem.md) is wider than 2 columns, the menu width is automatically extended. 322. The default minimum width of the menu is 64 vp. You can change the minimum width through the [constraintSize](../../../application-dev/reference/arkui-ts/ts-universal-attributes-size.md) attribute. 33 34**Key API/Component Changes** 35 36[Menu](../../../application-dev/reference/arkui-ts/ts-basic-components-menu.md) 37 38**Adaptation Guide** 39 40You can set the minimum width to a value less than 64 vp or remove the limit altogether, by setting **constraintSize**. 41 42**Example** 43```ts 44@Entry 45@Component 46struct Index { 47 @Builder 48 MyMenu(){ 49 Menu() { 50 MenuItem({ startIcon: $r("app.media.icon"), content: "Menu option" }) 51 } 52 .width(30) 53 .constraintSize({minWidth: 0}) //Overwrite the default minimum width of 64 vp. 54 } 55 56 build() { 57 Row() { 58 Column() { 59 Text('click to show menu') 60 } 61 .bindMenu(this.MyMenu) 62 .width('100%') 63 } 64 .height('100%') 65 } 66} 67``` 68 69## cl.arkui.4 Change in the Velocity Direction Specification of springCurve 70 71**Change Impact** 72 73In API version 9, when the [interpolate](../../../application-dev/reference/apis/js-apis-curve.md#interpolate9) method of [springCurve](../../../application-dev/reference/apis/js-apis-curve.md#curvesspringcurve9) is used for calculation, an initial velocity greater than 0 means to move in the reverse direction of the end point, and an initial velocity less than 0 means move in the direction of the end point. 74 75Since API version 10, when the **interpolate** method of **springCurve** is used for calculation, an initial velocity greater than 0 means to move in the direction of the end point, and an initial velocity less than 0 means move in the reverse direction of the end point. As a result, when the initial velocity is not 0, the result obtained using the **interpolate** method of **springCurve** in API version 10 is different from that in API version 9. 76 77## cl.arkui.5 Change in the Actual Curve Time Estimation Threshold Specification of springCurve 78 79**Change Impact** 80 81In API version 9, the maximum duration estimated by the [interpolate](../../../application-dev/reference/apis/js-apis-curve.md#interpolate9) method of [springCurve](../../../application-dev/reference/apis/js-apis-curve.md#curvesspringcurve9) for the actual spring curve is 1 second. When the physics-based curve duration exceeds 1 second, the estimated duration is still 1 second. As a result, the animation duration of the spring curve that exceeds 1 second is incorrectly normalized, and the interpolation result changes abruptly when t=1. 82 83Since API version 10, the maximum duration estimated by the **interpolate** method of **springCurve** is 1000 seconds, so as to cover most spring curves. This change will result in differences from the calculation results by the **interpolate** method of **springCurve** in API versions earlier than 10.