# Basic example
output <- matrix(1:4,
                 ncol = 2,
                 dimnames = list(list("Row 1", "Row 2"),
                                 list("Column 1", "Column 2")))
htmlTable(output)
invisible(readline(prompt = "Press [enter] to continue"))

# An advanced output
output <- matrix(ncol = 6, nrow = 8)

for (nr in 1:nrow(output)) {
  for (nc in 1:ncol(output)) {
    output[nr, nc] <-
      paste0(nr, ":", nc)
  }
}

output |>
  addHtmlTableStyle(
    align = "r",
    col.columns = c(rep("none", 2), rep("#F5FBFF", 4)),
    col.rgroup = c("none", "#F7F7F7"),
    css.cell = "padding-left: .5em; padding-right: .2em;"
  ) |>
  htmlTable(
    header = paste(c("1st", "2nd", "3rd", "4th", "5th", "6th"), "hdr"),
    rnames = paste(c("1st", "2nd", "3rd", paste0(4:8, "th")), "row"),
    rgroup = paste("Group", LETTERS[1:3]),
    n.rgroup = c(2, 4, nrow(output) - 6),
    cgroup = rbind(c("", "Column spanners", NA),
                   c("", "Cgroup 1", "Cgroup 2&dagger;")),
    n.cgroup = rbind(c(1, 2, NA),
                     c(2, 2, 2)),
    caption = "Basic table with both column spanners (groups) and row groups",
    tfoot = "&dagger; A table footer commment",
    cspan.rgroup = 2
  )
invisible(readline(prompt = "Press [enter] to continue"))

# An advanced empty table
suppressWarnings({
  matrix(ncol = 6, nrow = 0) |>
    addHtmlTableStyle(
      col.columns = c(rep("none", 2), rep("#F5FBFF", 4)),
      col.rgroup = c("none", "#F7F7F7"),
      css.cell = "padding-left: .5em; padding-right: .2em;"
    ) |>
    htmlTable(
      align = "r",
      header = paste(c("1st", "2nd", "3rd", "4th", "5th", "6th"), "hdr"),
      cgroup = rbind(c("", "Column spanners", NA),
                     c("", "Cgroup 1", "Cgroup 2&dagger;")),
      n.cgroup = rbind(c(1, 2, NA),
                       c(2, 2, 2)),
      caption = "Basic empty table with column spanners (groups) and ignored row colors",
      tfoot = "&dagger; A table footer commment",
      cspan.rgroup = 2
    )
})
invisible(readline(prompt = "Press [enter] to continue"))

# An example of how to use the css.cell for header styling
simple_output <- matrix(1:4, ncol = 2)

simple_output |>
  addHtmlTableStyle(
    css.cell = rbind(
      rep("background: lightgrey; font-size: 2em;", times = ncol(simple_output)),
      matrix("", ncol = ncol(simple_output), nrow = nrow(simple_output))
    )
  ) |>
  htmlTable(header = LETTERS[1:2])
invisible(readline(prompt = "Press [enter] to continue"))

# See vignette("tables", package = "htmlTable")
# for more examples, also check out tidyHtmlTable() that manages
# the group arguments for you through tidy-select syntax