Maybe color shouldn't map to textfont.color

plotly.js seems to impose smart defaults for text color anyway, for example:

Note that if you change split to color, you can't see the text!!

zoo_dat <- tibble::tibble(
  animal = rep(c('giraffes', 'orangutans', 'monkeys'), 2),
  count = c(20, 14, 23, 12, 18, 29),
  zoo = rep(c('SF Zoo', 'LA Zoo'), each = 3)
)
plot_ly(zoo_dat) %>%
  add_bars(
    x = ~animal,
    y = ~count,
    text = ~count,
    textposition = "auto",
    split = ~zoo,
    stroke = I("black")
  )

首先在 R 中复现所提供的 plot_ly/add_bars 示例，并检查当柱形使用 split = ~zoo 时 plotly.js 如何分配 textfont.color。将 split 更改为 color 后比较输出；在所报告的 smart-default 行为下文本仍保持可见即表示完成。