Feature request: Option for alt text for plotly plot in shiny app

I was recently trying to add alt text for a plotly-based animated plot within a shiny app. I saw that there is a comparatively recent option to add alt text via an alt argument in, e.g., package shiny's renderPlot(). I didn't see anything similar in R plotly. Is it possible something similar could be extended for renderPlotly()?

I was able to get alt text added to my plot via htmltools::tagAppendAttributes() in the UI code, although it took me a bit to get it (apparently) right.

まず renderPlotly() のエントリポイントをたどり、shiny の renderPlot() について説明されている alt 引数の動作と比較します。既存の htmltools::tagAppendAttributes() による回避策が望ましい結果を示しています。完了とは、shiny アプリ内の plotly プロットに alt テキストを提供する同等の方法が実現されていることを意味します。