custom tooltip affact timeline

[XiangyunHuang]

I don't know why this happen and how can I avoid side effect when I add more infomation to tooltip

When I move mouse to timeline, strange thing happens.

a minimal reprex example

library(echarts4r)

mtcars |>
  group_by(cyl) |>
  e_charts(wt, timeline = TRUE) |>
  e_scatter(mpg, qsec) |>
  e_tooltip(formatter = htmlwidgets::JS("
      function(params){
        return('wt: ' + params.value[0] + '<br />mpg: ' + params.value[1])
      }
    ")
  )

sessioninfo

> sessionInfo(package = "echarts4r")

R version 4.2.0 (2022-04-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Big Sur/Monterey 10.16

Matrix products: default
BLAS:   /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRblas.0.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib

locale:
[1] zh_CN.UTF-8/zh_CN.UTF-8/zh_CN.UTF-8/C/zh_CN.UTF-8/zh_CN.UTF-8

attached base packages:
character(0)

other attached packages:
[1] echarts4r_0.4.4

loaded via a namespace (and not attached):
[1] compiler_4.2.0  graphics_4.2.0  utils_4.2.0     grDevices_4.2.0
[5] stats_4.2.0     datasets_4.2.0  methods_4.2.0   base_4.2.0     
> 

[JohnCoene]

Thank you for the detailed report.
That seems to be a bug in echarts.js, I don't understand why this would trigger a tooltip.

This "fixes" it

mtcars |>
  group_by(cyl) |>
  e_charts(wt, timeline = TRUE) |>
  e_scatter(mpg, qsec) |>
  e_tooltip(formatter = htmlwidgets::JS("
      function(params){
        if(params.value[0])
          return('wt: ' + params.value[0] + '<br />mpg: ' + params.value[1])

        return 'step:' + params.name;
      }
    ")
  )

[XiangyunHuang]

Thanks, The problem is solved.