lt_style: Style Cells

In lt: Lightweight Tables via JSON Specs and JavaScript

Style Cells

Description

Apply CSS styling to specific cells. Target cells by column, row, or both. When test is provided, styles are applied conditionally based on cell values (evaluated in JavaScript).

Usage

lt_style(
  x,
  columns = NULL,
  rows = NULL,
  test = NULL,
  class = NULL,
  bold = NULL,
  italic = NULL,
  color = NULL,
  bg = NULL,
  ...
)

Arguments

x	An lt() object.
columns	Character vector of column names, a one-sided formula, or NULL for all.
rows	Integer vector of 1-based row indices (or NULL for all).
test	A JavaScript function as a string (e.g., "v => v < 0") that receives the raw cell value and returns true to apply the style. When NULL, the style applies unconditionally.
class	CSS class name(s) to add to matching cells. Define the corresponding rules in an external stylesheet via lt_css().
bold	Logical: apply bold weight?
italic	Logical: apply italic style?
color	Text color (any CSS color value, e.g., "red", "#06c").
bg	Background color.
...	Additional CSS properties as named arguments. Names can be camelCase (e.g., borderLeft) or quoted dash-case (e.g., `border-left`). Values are CSS strings.

Value

x with the style recorded.

Examples

tbl = lt(head(mtcars))
tbl |>
  lt_style("mpg", rows = 1L, bold = TRUE, borderBottom = "2px solid red")
tbl |>
  lt_style("mpg", test = "v => v > 20", class = "high") |>
  lt_css(.high = list(background = "#cfc"))

lt documentation built on July 10, 2026, 1:09 a.m.