🤔 [QUESTION] scrollbar可以根据数据量的长度自动显示或不显示吗

[ChaoQunPeng]

🐛 Question description [Please make everyone to understand it]

加了scrollbar属性后滚动条就直接出现了，也没法显示，数据量少也是直接出现，可以做到数据超过容器长度时，自动显示吗。

💻 Link to minimal reproduction

Please provide a link by forking these links g2plot or GitHub repo. What is a minimal reproduction, and why is it required?

🏞 Expected result

🚑 Any additional [like screenshots]

• G2Plot Version:
• "@antv/g2plot": "^2.4.20"
• Platform: mac