e_tooltip(e, trigger = c("item", "axis"), formatter = NULL, ...)

e_tooltip_item_formatter(
  style = c("decimal", "percent", "currency"),
  digits = 0,
  locale = NULL,
  currency = "USD"
)

e_tooltip_choro_formatter(
  style = c("decimal", "percent", "currency"),
  digits = 0,
  locale = NULL,
  currency = "USD"
)

e_tooltip_pie_formatter(
  style = c("decimal", "percent", "currency"),
  digits = 0,
  locale = NULL,
  currency = "USD",
  ...
)

e_tooltip_pointer_formatter(
  style = c("decimal", "percent", "currency"),
  digits = 0,
  locale = NULL,
  currency = "USD"
)

# basic
USArrests %>%
  e_charts(Assault) %>%
  e_scatter(Murder) %>%
  e_tooltip()

# formatter
cars %>%
  dplyr::mutate(
    dist = dist / 120
  ) %>%
  e_charts(speed) %>%
  e_scatter(dist, symbol_size = 5) %>%
  e_tooltip(
    formatter = e_tooltip_item_formatter("percent")
  )

# axis pointer
cars %>%
  e_charts(speed) %>%
  e_scatter(dist, symbol_size = 5) %>%
  e_tooltip(
    formatter = e_tooltip_pointer_formatter("currency"),
    axisPointer = list(
      type = "cross"
    )
  )