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carbon-components-svelte

Carbon Components Svelte is a Svelte component library that implements the Carbon Design System, an open source design system by IBM.

Design systems facilitate design and development through reuse, consistency, and extensibility.

The Carbon Svelte portfolio also includes:

Carbon Icons Svelte: 2,400+ Carbon icons as Svelte components
Carbon Pictograms Svelte: 1,100+ Carbon pictograms as Svelte components
Carbon Charts Svelte: 20+ charts, powered by d3
Carbon Preprocess Svelte: Collection of Svelte preprocessors for Carbon

Documentation

Other forms of documentation are auto-generated:

TypeScript definitions: Component TypeScript definitions
Component Index: Component API in Markdown format
Component API: Component API in JSON format

Installation

# npm
npm i carbon-components-svelte

# pnpm
pnpm i carbon-components-svelte

# Yarn
yarn add carbon-components-svelte

# Bun
bun add carbon-components-svelte

Usage

Styling

Before importing components, you will need to first apply Carbon component styles. The Carbon Design System supports five themes (2 light, 3 dark).

white.css: Default Carbon theme (light)
g10.css: Gray 10 theme (light)
g80.css: Gray 80 theme (dark)
g90.css: Gray 90 theme (dark)
g100.css: Gray 100 theme (dark)
all.css: All themes (White, Gray 10, Gray 90, Gray 100) using CSS variables

Each StyleSheet is generated from the flagship carbon-components library.

The compiled CSS is generated from the following .scss files:

CSS StyleSheet

// White theme
import "carbon-components-svelte/css/white.css";

// Gray 10 theme
import "carbon-components-svelte/css/g10.css";

// Gray 80 theme
import "carbon-components-svelte/css/g80.css";

// Gray 90 theme
import "carbon-components-svelte/css/g90.css";

// Gray 100 theme
import "carbon-components-svelte/css/g100.css";

// All themes
import "carbon-components-svelte/css/all.css";

SCSS

The most performant method to load styles is to import SCSS directly from carbon-components. Although it requires more set up, you can reduce the size of the bundle CSS by importing individual component styles instead of a pre-compiled CSS StyleSheet.

Refer to the official Carbon guide on SASS for documentation.

Dynamic theming

Use the "all.css" StyleSheet for dynamic, client-side theming.

import "carbon-components-svelte/css/all.css";

Update the theme by setting the theme attribute on the html element. The default theme is "white".

<!doctype html>
<html lang="en" theme="g10">
  <body>
    ...
  </body>
</html>

Programmatically switch between each of the five Carbon themes by setting the "theme" attribute on the HTML element.

<script>
  let theme = "white"; // "white" | "g10" | "g80" | "g90" | "g100"

  $: document.documentElement.setAttribute("theme", theme);
</script>

Importing components

Import components from carbon-components-svelte in the script tag of your Svelte file. Visit the documentation site for examples.

<!-- App.svelte -->
<script>
  import { Accordion, AccordionItem } from "carbon-components-svelte";
</script>

<Accordion>
  <AccordionItem title="Section 1" open> Content 1 </AccordionItem>
  <AccordionItem title="Section 2"> Content 2 </AccordionItem>
  <AccordionItem title="Section 3"> Content 3 </AccordionItem>
</Accordion>

Refer to COMPONENT_INDEX.md for component API documentation.

Preprocessors & Plugins

carbon-preprocess-svelte is a collection of Svelte preprocessors for Carbon.

[!NOTE] Using carbon-preprocess-svelte is optional and not a prerequisite for this library. It should be installed as a development dependency.

# npm
npm i -D carbon-preprocess-svelte

# pnpm
pnpm i -D carbon-preprocess-svelte

# Yarn
yarn add -D carbon-preprocess-svelte

# Bun
bun add -D carbon-preprocess-svelte

`optimizeImports`

optimizeImports is a Svelte preprocessor that rewrites barrel imports from Carbon components/icons/pictograms packages to their source Svelte code paths. This can significantly speed up development and production build compile times while preserving typeahead and autocompletion offered by integrated development environments (IDE) like VS Code.

The preprocessor optimizes imports from the following packages:

Before & After

- import { Button } from "carbon-components-svelte";
+ import Button from "carbon-components-svelte/src/Button/Button.svelte";

- import { Add } from "carbon-icons-svelte";
+ import Add from "carbon-icons-svelte/lib/Add.svelte";

- import { Airplane } from "carbon-pictograms-svelte";
+ import Airplane from "carbon-pictograms-svelte/lib/Airplane.svelte";

Usage

See examples for full configurations.

// svelte.config.js
import { optimizeImports } from "carbon-preprocess-svelte";

export default {
  preprocess: [optimizeImports()],
};

Any other preprocessors that transpile code in the script block should be invoked before optimizeImports.

For example, vitePreprocess should precede optimizeImports.

// svelte.config.js
+ import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
import { optimizeImports } from "carbon-preprocess-svelte";

export default {
  preprocess: [
+   vitePreprocess(),
    optimizeImports()
  ],
};

`optimizeCss`

optimizeCss is a Vite plugin that removes unused Carbon styles at build time. The plugin is compatible with Rollup (Vite extends the Rollup plugin API).

carbon-components-svelte@0.85.0 or greater is required.

$ vite build

Optimized index-CU4gbKFa.css
- Before: 606.26 kB
+ After:   53.22 kB (-91.22%)

dist/index.html                  0.34 kB │ gzip:  0.24 kB
dist/assets/index-CU4gbKFa.css  53.22 kB │ gzip:  6.91 kB
dist/assets/index-Ceijs3eO.js   53.65 kB │ gzip: 15.88 kB

[!NOTE] This is a plugin and not a Svelte preprocessor. It should be added to the list of vite.plugins. For Vite set-ups, this plugin is only run when building the app. For Rollup and Webpack, you should conditionally apply the plugin to only execute when building for production.

Usage

See examples for full configurations.

// vite.config.js
import { sveltekit } from "@sveltejs/kit/vite";
import { optimizeCss } from "carbon-preprocess-svelte";
import { defineConfig } from "vite";

export default defineConfig({
  plugins: [sveltekit(), optimizeCss()],
});

Examples

TypeScript support

TypeScript definitions are generated by sveld.

Contributing

Refer to the Contributing guidelines.

Changelog

License

Apache 2.0

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