The graph does not appear if a single bottom of the moderbar is removed

Using the example https://plotly.com/r/configuration-options/ if the vector only has a single record the graph does not appear. For example:
modeBarButtonsToRemove = c('hoverClosestCartesian').

However if you add a second record the graph appears
modeBarButtonsToRemove = c('hoverClosestCartesian','hoverClosestCartesian').

Or if the list() function is used instead of the c() function, the graph also appears
ToRemove = list('hoverClosestCartesian')

Regards.

首先，复现 plotly.com 上的配置选项示例，分别在 modeBarButtonsToRemove 中使用一个和两个条目，并比较 c() 与 list()。然后追踪 R 配置如何转换为用于渲染的配置，并验证只移除一个按钮仍能生成可见的图表。