additional support for column groups in interactive tables #1618

[obsaditelnost]

Summary

gt offers a very strong support for column groups (spanner labels) in static tables. The interactive table underlying reactable only offers a limited functionality but until now, gt didn't yet support colGroups at all for interactive tables. These changes transform the first layer of spanner-labels into colGroups:

gtcars %>%
  dplyr::select(model, year, mpg_c, mpg_h) %>%
  gt() %>%
  gt::tab_spanner("mpg", c(mpg_c, mpg_h)) %>%
  opt_interactive()

Related GitHub Issues and PRs

• Ref: add support for column groups in interactive tables #1618

Checklist

• I understand and agree to the Code of Conduct.
• I have listed any major changes in the NEWS.
• I have added testthat unit tests to tests/testthat for any new functionality.

Fixes: #1618

[rich-iannone]

Thanks so much for submitting this PR! Will review shortly.

[rich-iannone]

LGTM!