@wordpress/theme

A theming package that’s part of the WordPress Design System. It has two parts:

• Design Tokens: A comprehensive system of design tokens for colors, spacing, typography, and more
• Theme System: A flexible theming provider for consistent theming across applications

Design Tokens

In the Design Tokens Reference document there is a complete reference of all available design tokens including colors, spacing, typography, and more.

Color Tokens

The design system defines color tokens using the following naming scheme:

--wpds-<element>-<tone>[-<emphasis>][-<state>]

Element specifies what the color is applied to.

Tone defines the semantic intent of the color.

[!NOTE]
caution and warning represent two escalation levels of non-error severity.
Use caution for guidance or minor risks, and warning when the user must act to prevent an error.

Emphasis adjusts color strength relative to the base tone, if specified. The default is a normal emphasis.

State represents the interactive state of the element, if specified. The default is an idle state.

Theme Provider

The ThemeProvider is a React component that should wrap your application to provide design tokens and theme context to the child UI components. It accepts a set of customizable seed values and automatically generates a set of design tokens, which are exposed as CSS custom properties for use throughout the application.

import { ThemeProvider } from '@wordpress/theme';

function App() {
    return (
        <ThemeProvider color={ { primary: 'blue' } }>
            { /* Your app content */ }
        </ThemeProvider>
    );
}

The color prop accepts an object with the following optional properties:

• primary: The primary/accent seed color (default: '#3858e9')
• bg: The background seed color (default: '#f8f8f8')

Both properties accept any valid CSS color value. The theme system automatically generates appropriate color ramps and determines light/dark mode based on these seed colors.

Nesting Providers

The provider can be used recursively to override or modify the theme for a specific subtree.

<ThemeProvider color={ { bg: 'white' } }>
    { /* light-themed UI components */ }
    <ThemeProvider color={ { bg: '#1e1e1e' } }>
        { /* dark-themed UI components */ }
        <ThemeProvider color={ { primary: 'red' } }>
            { /* dark-themed with red accent */ }
        </ThemeProvider>
    </ThemeProvider>
    { /* light-themed UI components */ }
</ThemeProvider>

The ThemeProvider redefines some of the design system tokens. Components consuming semantic design system tokens will automatically follow the chosen theme. Note that the tokens are defined and inherited using the CSS cascade, and therefore the DOM tree, not the React tree. This is very important when using React portals.

Building

This package is built in two steps. When npm run build is run at the root of the repo, it will first run the “prebuild” step of this package, which is defined in the build script of this package’s package.json.

This step will:

1. Generate primitive tokens.
2. Build CSS and JavaScript token files.
3. Update the design tokens documentation.
4. Format all generated files.

The files generated in this step will all be committed to the repo.

After the prebuild step, the package will be built into its final form via the repo’s standard package build script.

Contributing to this package

This is an individual package that’s part of the Gutenberg project. The project is organized as a monorepo. It’s made up of multiple self-contained software packages, each with a specific purpose. The packages in this monorepo are published to npm and used by WordPress as well as other software projects.

To find out more about contributing to this package or Gutenberg as a whole, please read the project’s main contributor guide.