Scrollbars Customization
By default, some of the components provide additional CSS styles, which are applied to their scrollbars in order to achieve their target design.
Setting Default Scrollbar Styles to Components​
To use native scrollbar styles, you have to add the CSS style class .ui5-content-native-scrollbars
to the body element of your application.
Note: Because of some browser restrictions, this setting takes effect if it is applied before the initial rendering of the components, which use it.
Example:
<body class="ui5-content-native-scrollbars">
...
</body>