stylesheet: Stylesheets

In termr: Modern Reactive Terminal Applications with Data Workflows

Stylesheets

Description

Parse termr stylesheets (RTCSS, a small CSS-like language) to style many widgets at once by type, id, class and state. Pass them to app(stylesheet = ) or app$add_stylesheet().

Usage

stylesheet(text, source = "<stylesheet>")

stylesheet_file(path)

Arguments

text	Stylesheet text.
source	Name used in error messages.
path	Path to a stylesheet file.

Details

Button { border: round; padding: 0 2; }
Button.danger { background: $error; }
#save { width: 20; }
Input:focus { border: heavy $accent; }
Vertical > Label { bold: true; }

Properties are the arguments of style() (border-color and border_color both work). border also accepts a colour: ⁠border: round cyan⁠. Colours can refer to the theme: ⁠$primary⁠. Errors report the line, column and property.

Rules apply above a widget type's built-in style and below a widget's own style. More specific selectors win (ids over classes and pseudo classes over types); among equally specific rules, later ones win.

Value

A termr_stylesheet.

Examples

sheet <- stylesheet("Button { border: round; } #save { background: $primary; }")
sheet

termr documentation built on Oct. 21, 2026, 5:13 p.m.