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Installation

Installation

How to install dependencies and structure your app.

Unlike the original shadcn/ui for React, where the full components can exist in a single file, components in this port are split into multiple files. This is because Svelte doesn't support defining multiple components in a single file, so utilizing the CLI to add components will be the optimal approach.

The CLI will create a folder for each component, which will sometimes just contain a single Svelte file, and in other times, multiple files. Within each folder, there will be an index.ts file that exports the component(s), so you can import them from a single file.

For example, the Accordion component is split into four .svelte files:

  • Accordion.svelte
  • AccordionContent.svelte
  • AccordionItem.svelte
  • AccordionTrigger.svelte

They can then be imported from the accordion/index.ts file like so:

	import * as Accordion from '$lib/components/ui/accordion"
// or
import {
  Accordion,
  AccordionContent,
  AccordionItem,
  AccordionTrigger
} from "$lib/components/ui/accordion"

Regardless of the import approach you take, the components will be tree-shaken by Rollup, so you don't have to worry about unused components being bundled into your app.

New Project

Create project

Use the SvelteKit CLI to create a new project.

	npm create svelte@latest my-app

Add TailwindCSS

Use the svelte-add CLI to add Tailwind CSS to your project.

	npx svelte-add@latest tailwindcss

Install dependencies

	npm install

Run the CLI

	npx shadcn-svelte@latest init

Configure components.json

You will be asked a few questions to configure components.json:

	Which style would you like to use? › Default
Which color would you like to use as base color? › Slate
Where is your global CSS file? › src/app.postcss
Where is your tailwind.config.[cjs|js|ts] located? › tailwind.config.js
Configure the import alias for components: › $lib/components
Configure the import alias for utils: › $lib/utils

Setup path aliases

If you changed the path aliases from the default, you'll also need to update your svelte.config.js file to include those aliases.

svelte.config.js
	const config = {
  // ... other config
  kit: {
    // ... other config
    alias: {
      $lib: "./src/lib"
    }
  }
};

Manual Installation

Create project

Use the SvelteKit CLI to create a new project.

	npm create svelte@latest my-app

Add Tailwind

Use the svelte-add CLI to add Tailwind CSS to your project.

	npx svelte-add@latest tailwindcss

Add dependencies

Add the following dependencies to your project:

	npm install tailwind-variants clsx tailwind-merge

Configure tailwind.config.js

This is what this project's tailwind.config.js file looks like:

tailwind.config.js
	import { fontFamily } from "tailwindcss/defaultTheme";

/** @type {import('tailwindcss').Config} */
const config = {
  darkMode: ["class"],
  content: ["./src/**/*.{html,js,svelte,ts}"],
  safelist: ["dark"],
  theme: {
    container: {
      center: true,
      padding: "2rem",
      screens: {
        "2xl": "1400px"
      }
    },
    extend: {
      colors: {
        border: "hsl(var(--border) / <alpha-value>)",
        input: "hsl(var(--input) / <alpha-value>)",
        ring: "hsl(var(--ring) / <alpha-value>)",
        background: "hsl(var(--background) / <alpha-value>)",
        foreground: "hsl(var(--foreground) / <alpha-value>)",
        primary: {
          DEFAULT: "hsl(var(--primary) / <alpha-value>)",
          foreground: "hsl(var(--primary-foreground) / <alpha-value>)"
        },
        secondary: {
          DEFAULT: "hsl(var(--secondary) / <alpha-value>)",
          foreground: "hsl(var(--secondary-foreground) / <alpha-value>)"
        },
        destructive: {
          DEFAULT: "hsl(var(--destructive) / <alpha-value>)",
          foreground: "hsl(var(--destructive-foreground) / <alpha-value>)"
        },
        muted: {
          DEFAULT: "hsl(var(--muted) / <alpha-value>)",
          foreground: "hsl(var(--muted-foreground) / <alpha-value>)"
        },
        accent: {
          DEFAULT: "hsl(var(--accent) / <alpha-value>)",
          foreground: "hsl(var(--accent-foreground) / <alpha-value>)"
        },
        popover: {
          DEFAULT: "hsl(var(--popover) / <alpha-value>)",
          foreground: "hsl(var(--popover-foreground) / <alpha-value>)"
        },
        card: {
          DEFAULT: "hsl(var(--card) / <alpha-value>)",
          foreground: "hsl(var(--card-foreground) / <alpha-value>)"
        }
      },
      borderRadius: {
        lg: "var(--radius)",
        md: "calc(var(--radius) - 2px)",
        sm: "calc(var(--radius) - 4px)"
      },
      fontFamily: {
        sans: ["Inter", ...fontFamily.sans]
      }
    }
  }
};

export default config;

Feel free to add or modify as needed to suit your project.

Configure styles

Add the following to your src/app.postcss file. You can learn more about using CSS variables for theming in the theming section.

src/app.postcss
	@tailwind base;
@tailwind components;
@tailwind utilities;

@layer base {
  :root {
    --background: 0 0% 100%;
    --foreground: 222.2 47.4% 11.2%;

    --muted: 210 40% 96.1%;
    --muted-foreground: 215.4 16.3% 46.9%;

    --popover: 0 0% 100%;
    --popover-foreground: 222.2 47.4% 11.2%;

    --border: 214.3 31.8% 91.4%;
    --input: 214.3 31.8% 91.4%;

    --card: 0 0% 100%;
    --card-foreground: 222.2 47.4% 11.2%;

    --primary: 222.2 47.4% 11.2%;
    --primary-foreground: 210 40% 98%;

    --secondary: 210 40% 96.1%;
    --secondary-foreground: 222.2 47.4% 11.2%;

    --accent: 210 40% 96.1%;
    --accent-foreground: 222.2 47.4% 11.2%;

    --destructive: 0 92% 38%;
    --destructive-foreground: 210 40% 98%;

    --ring: 215 20.2% 65.1%;

    --radius: 0.5rem;
  }

  .dark {
    --background: 224 71% 4%;
    --foreground: 213 31% 91%;

    --muted: 223 47% 11%;
    --muted-foreground: 215.4 16.3% 56.9%;

    --accent: 216 34% 17%;
    --accent-foreground: 210 40% 98%;

    --popover: 224 71% 4%;
    --popover-foreground: 215 20.2% 65.1%;

    --border: 216 34% 17%;
    --input: 216 34% 17%;

    --card: 224 71% 4%;
    --card-foreground: 213 31% 91%;

    --primary: 210 40% 98%;
    --primary-foreground: 222.2 47.4% 1.2%;

    --secondary: 222.2 47.4% 11.2%;
    --secondary-foreground: 210 40% 98%;

    --destructive: 359 51% 48%;
    --destructive-foreground: 210 40% 98%;

    --ring: 216 34% 17%;

    --radius: 0.5rem;
  }
}

@layer base {
  * {
    @apply border-border;
  }
  body {
    @apply bg-background text-foreground;
    font-feature-settings: "rlig" 1, "calt" 1;
  }
}

Configure utils

You'll want to create a cn helper to make it easier to conditionally add Tailwind CSS classes. Additionally, you'll want to add the custom transition that is used by various components.

src/lib/utils.ts
	import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";
import { cubicOut } from "svelte/easing";
import type { TransitionConfig } from "svelte/transition";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

type FlyAndScaleParams = {
  y?: number;
  x?: number;
  start?: number;
  duration?: number;
};

export const flyAndScale = (
  node: Element,
  params: FlyAndScaleParams = { y: -8, x: 0, start: 0.95, duration: 150 }
): TransitionConfig => {
  const style = getComputedStyle(node);
  const transform = style.transform === "none" ? "" : style.transform;

  const scaleConversion = (
    valueA: number,
    scaleA: [number, number],
    scaleB: [number, number]
  ) => {
    const [minA, maxA] = scaleA;
    const [minB, maxB] = scaleB;

    const percentage = (valueA - minA) / (maxA - minA);
    const valueB = percentage * (maxB - minB) + minB;

    return valueB;
  };

  const styleToString = (
    style: Record<string, number | string | undefined>
  ): string => {
    return Object.keys(style).reduce((str, key) => {
      if (style[key] === undefined) return str;
      return str + key + ":" + style[key] + ";";
    }, "");
  };

  return {
    duration: params.duration ?? 200,
    delay: 0,
    css: (t) => {
      const y = scaleConversion(t, [0, 1], [params.y ?? 5, 0]);
      const x = scaleConversion(t, [0, 1], [params.x ?? 0, 0]);
      const scale = scaleConversion(t, [0, 1], [params.start ?? 0.95, 1]);

      return styleToString({
        transform:
          transform +
          "translate3d(" +
          x +
          "px, " +
          y +
          "px, 0) scale(" +
          scale +
          ")",
        opacity: t
      });
    },
    easing: cubicOut
  };
};

Import styles to your app

Create src/routes/+layout.svelte and import the styles:

src/routes/+layout.svelte
	<script lang="ts">
  import "../app.postcss";
</script>

<slot />

Icons

This project uses icons from Lucide for the default style, and Radix for the new-york style, but feel free to use any icon library.

App structure

Here's a recommended, but not required app structure:

	src
├── lib
│   ├── components
│   │   ├── ui
│   │   │   ├── alert-dialog
│   │   │   │   ├── index.ts
│   │   │   │   └── alert.svelte
│   │   │   ├── button
│   │   │   │   ├── index.ts
│   │   │   │   └── button.svelte
│   │   │   └── ...
│   │   ├── navigation.svelte
│   │   ├── page-header.svelte
│   │   └── ...
│   └── utils.ts
├── routes
│   ├── +page.svelte
│   └── +layout.svelte
├── app.postcss
  • Place the UI components in the lib/components/ui folder.
  • The rest of the components such as <PageHeader /> and <Navigation /> are placed in the lib/components folder.
  • The lib/utils.ts file is where you can define the cn helper.
  • The app.postcss file contains the global CSS.

That's it. You can now start adding components to your project.

Introduction components.json