tooltip option to show an image

[peterlittlejohn]

Hello,

Thank you so much for your R wrapper to use the stunning Highcharts Library. Would it be possible to have a tooltip to show an image (.png)? I know that you have a few posts about tooltips, but this did not seem to be a direct extension of those.

[fraupflaume]

Yes, you can. Here's an example.

library(highcharter)

data(economics, package = 'ggplot2')

economics <- economics[1, ]

highchart() %>%
    hc_xAxis(categories = economics$date, type = "datetime") %>% 
    hc_add_series(name = "Unemployed", data = economics$unemploy) %>% 
    hc_tooltip(useHTML = T,
               formatter = JS("function() {
               var img = '<img src = \"https://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Transparent_Background_Dromedary_Camel.png/97px-Transparent_Background_Dromedary_Camel.png?20220413201058\" height=\"80\" width=\"99\"/>';
               return img
               }"))

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