ctx.registerThemePreset

Contribute a selectable theme to the picker. Core ships only Dark and Light; every other theme — Tokyo Night, Solarized Light, Gruvbox Dark, and anything your extension adds — is registered this way. The preset's vars override the base palette in theme.css when it's the active theme.

ctx.registerThemePreset(preset: ThemePreset): Disposable

Example

ctx.registerThemePreset({
  id: "acme.midnight",
  name: "Midnight",
  base: "dark", // Monaco/xterm base + the data-theme attribute
  colorScheme: "dark",
  vars: {
    "--silo-color-bg": "#0b0f1a",
    "--silo-color-accent": "#5eb1ff",
    // …any subset of ThemeVars; the base palette fills the rest
  },
});

For the full set of overridable keys and how to author a theme end-to-end, see Building a theme.

Types

Pass ThemePreset; its vars are a Partial<ThemeVars>.

See also

Read the merged preset set or switch the active theme via ctx.theme. Other Registration members on ctx.