Graphic SvelteKit and Tailwind CSS

20 August 2023

SvelteKit and Tailwind CSS

Irelia Codeheart, Senior Developer

Introduction to SvelteKit and Tailwind CSS

In this stage of web development, the attraction towards highly interactive, user-friendly, and visually appealing applications is undeniably high. This is where our major players - SvelteKit and Tailwind CSS - come in, offering interesting prospects to developers. For comparisons of other frameworks, check out more articles of our caisy blog.

What is SvelteKit?

SvelteKit, a framework for building web applications, is an evolution of Sapper with the added benefits of Svelte's compiler technology. It's capable of rendering applications on the server-side, generating static sites, or providing fully dynamic single-page applications, depending on the user's needs. It assists in handling the tricky parts of application building, such as handling routes, server-side rendering (SSR), and connection endpoints, allowing developers to focus on the main logic of their application.

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What is Tailwind CSS?

On the other hand, Tailwind CSS fills the design gap of our applications. It's a framework for building user interfaces rendering utility-first CSS, meaning instead of predesigned components, it focuses on giving you low-level utility classes to build your unique design. The real beauty of Tailwind comes from its acknowledgeable flexibility, as you can prototype quickly and then refine the design with minimal effort by simply applying utility classes.

How can SvelteKit and Tailwind CSS be used together?

The exciting part begins when we combine these two powerful tools. Not only do you get to build applications with a performance-centric framework, but you'll also style them with an elegant, utility-first CSS framework - the best of both worlds. And here's how it works:

  1. Creation of a new SvelteKit project: Initiate by using npm init svelte@next to create a new project.

  2. Install Tailwind CSS and its dependencies: This includes svelte-preprocess, postcss, tailwindcss, and autoprefixer.

  3. Generate the configuration files: This can be done using npx tailwindcss init for Tailwind and npx svelte-add postcss for Svelte.

  4. Enable PostCSS in SvelteKit: Update svelte.config.js file to include svelte-preprocess and other configurations.

  5. Update the Tailwind configuration file: Tailwind uses tailwind.config.js for custom configuration.

  6. Create app.css and import in the layout file: Write class styles in app.css file and import it to your Svelte component.

  7. Run the build: Using npm scripts, you can now start the application and do amazing things.

By following these steps systematically, users can effortlessly integrate SvelteKit with Tailwind CSS, promising highly satisfying results in their web development journey. We will be heading in-depth on these steps as we move further into the article.

This perfect blend of SvelteKit's performance with Tailwind's flexibility ranges the pinnacle of modern web development, a combinational boon for developers. As we progress through this article, we'd be getting a more granular understanding of how to incorporate these two for an enhanced development experience.

Getting Started with SvelteKit and Tailwind CSS

In this section, we take a deep dive into starting a new SvelteKit project, integrating Tailwind CSS into your application, and utilizing Tailwind's utility classes to build a visually appealing web application.

Setting up a SvelteKit Project

To kick-off, we'll start with setting up a SvelteKit project. Assuming you have NodeJS and npm installed,

npm init svelte@next

This command will create a new SvelteKit project in the current directory. If asked to select which features to include, select none at this point.

Integrating Tailwind CSS with SvelteKit

When it comes to integrating Tailwind CSS into SvelteKit, the process is fairly straightforward. Here's a step-by-step guide:

  1. Install Tailwind CSS and its dependencies:

npm install -D tailwindcss@latest postcss@latest autoprefixer@latest
  1. Generate Tailwind configuration files:

npx tailwindcss init -p

This command creates a tailwind.config.js and a postcss.config.js at the root of your project.

  1. Update the tailwind.config.js to fit your needs and add Tailwind's directives to your CSS. Create a src/app.css:

@import 'tailwindcss/base';
@import 'tailwindcss/components';
@import 'tailwindcss/utilities';
  1. Reference the app.css in your src/routes/__layout.svelte file:

<style lang="postcss">
  @import '../app.css';
  1. Add svelte-preprocess in the svelte.config.js for Svelte to understand PostCSS:

const preprocess = require('svelte-preprocess');

/** @type {import('@sveltejs/kit').Config} */
const config = {
	preprocess: preprocess(),
	kit: {
		target: '#svelte'

export default config;
  1. Run the build process:

npm run dev

Understanding and Using Tailwind's Utility Classes

Tailwind CSS provides highly adjustable utility-first classes. They are used directly in your markup, leaving your custom CSS file free from unnecessary bloat.

For example, if we want an element with padding, a blue background, rounded corners, and centered text, we would write in our Svelte component:

<div class="p-6 bg-blue-500 rounded text-center">Hello, SvelteKit and Tailwind CSS!</div>

Using these utility classes, designers and developers can create custom designs without ever leaving the HTML, leading to faster development cycles and prototyping.

Best Practices for Integrating SvelteKit with Tailwind CSS

When combining SvelteKit with Tailwind CSS in your projects, there are several best practices and considerations to keep in mind for an efficient setup. The following points will cover how to structure your project, configure PostCSS and Tailwind, and ensure good performance.

Structuring Your SvelteKit-Tailwind Project

SvelteKit provides a flexible file structure that allows you to craft the architecture that suits your project best. However, a suggested practice to follow when using Tailwind CSS with SvelteKit is to have a dedicated assets folder in your src directory.

This assets folder can contain your CSS files, including a main.css file where you can import your Tailwind directives.

- src
    - routes
    - lib
    - assets
        - main.css

In your main.css file, you can import Tailwind CSS's utility classes to style your components.

@import 'tailwindcss/base';
@import 'tailwindcss/components';
@import 'tailwindcss/utilities';

Configuring PostCSS and Tailwind Config Files

Ensuring your PostCSS and Tailwind CSS configuration files are properly set is crucial for a smoothly running project. After installing your dependencies, enable PostCSS in your SvelteKit project. Then configure your template paths and import your Tailwind CSS files in your tailwind.config.js file.

You can follow this sample PostCSS configuration:

module.exports = {
  plugins: {
    tailwindcss: {},
    autoprefixer: {},

And an example Tailwind CSS configuration could be:

module.exports = {
    purge: ['./src/**/*.{js,ts,svelte}'],
    darkMode: false, // or 'media' or 'class'
    theme: {
        extend: {},
    variants: {
        extend: {},
    plugins: [],

Remember to run your build process to generate your Tailwind CSS styles once you've configured these files.

Performance Considerations When Using SvelteKit and Tailwind

When using SvelteKit and Tailwind, one of the key performance considerations is the purge option in your Tailwind CSS configuration. This option helps with removing unused styles and reducing the size of your CSS. However, to make this process work effectively, you need to direct the purge option to the right places in your project.

In your tailwind.config.js file, set up the purge option to search for class names in your Svelte files. You can do this by specifying a glob pattern to the *.svelte files in your src directory as follows:

module.exports = {
    purge: ['./src/**/*.{js,ts,svelte}'],
    // ...

By following these best practices, you can ensure a well-structured, well-configured, and performant SvelteKit and Tailwind project.

Real-World Applications of SvelteKit and Tailwind CSS

In this section, we will examine practical examples of web development techniques using SvelteKit and Tailwind CSS.

Exploring Examples of CRUD Operations, Authentication, Routing, and Pagination

SvelteKit and Tailwind CSS are powerful tools for creating full stack web applications that require CRUD (Create, Read, Update, Delete) operations, authentication, routing, and pagination. In recent updates, SvelteKit made improvements to its routing and props handling, reducing unnecessary re-rendering. This means creating a web application with CRUD operations is now even more seamless with SvelteKit **.**

For instance, if we wish to create a Post object, we can utilize JavaScript's Fetch API integrated with our SvelteKit application.

let post = {title: 'My First Post', content: 'This is my first post'};
fetch('/api/posts', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  body: JSON.stringify(post)

Learning from Existing SvelteKit and Tailwind CSS GitHub Repositories

There exist numerous public GitHub repositories that contain projects built using SvelteKit and Tailwind CSS. Going through these repositories offers a great learning experience. Some projects even incorporate authentication and pagination, showcasing a full-stack approach to development.

A notable repository is the one by Lucia, which provides an authentication library for Svelte developers, and another is Skeleton, which is a UI component library compatible with Svelte and Tailwind.

// Skeleton UI component 
<script ...>
  import { SkeletonComponent} from 'skeleton';
<SkeletonComponent />

// Lucia Authentication
<script ...>
  import { Lucia } from 'lucia';
  let authenticated = Lucia.authenticated();
<p>{#if authenticated}Welcome back!{/if}</p>

Building a Photo Gallery Using SvelteKit and Tailwind CSS

Using the robustness and efficiency of SvelteKit in conjunction with the utility-first styling approach of Tailwind CSS, it's possible to build a feature-rich photo gallery. We could use the Fetch API again to pull data from an image API and use Svelte's built-in structures to render each image.

<script ...>
    .then(response => response.json())
    .then(data => console.log(data));
{#each images as image}
  <div class="w-full sm:w-1/2 md:w-1/3 lg:w-1/4 xl:w-1/6">
    <img class="w-full" src="{image.url}" alt="{image.title}" />

In this example, Tailwind CSS allows us to quickly define responsive grid layouts for the photo gallery.

These are just a few examples of how rapidly and effectively one can build web applications with SvelteKit and Tailwind CSS. Using these tools can significantly cut down development time, allow for greater customization, and produce a superior product. And the last but not the least, getting hands-on with these examples can be a great way to master web development with SvelteKit and Tailwind CSS.

Staying Updated with SvelteKit and Tailwind CSS

Even after mastering the art of web development using SvelteKit and Tailwind CSS, continuous learning and staying updated with the latest changes is crucial to improving your skill set further. This section highlights the recent developments and changes in both SvelteKit and Tailwind CSS, as well as introduces key community resources and tools for enhancing your development experience.

Latest Developments and Changes in SvelteKit

SvelteKit, similar to any other evolving technology framework, witnesses regular updates and improvements to enhance developer productivity and application performance. While no source provides minute-by-minute updates, notable advents usually involve augmentations to existing features, improved compatibility with other libraries, or handling of identified issues.

Markdown documentation forms the cornerstone to learn about these changes, where the 'Release Notes' section often outlines the update details. Regular interaction with the SvelteKit community via online forums, GitHub repositories or stack overflow can also be insightful.

New Features in Tailwind CSS

Tailwind CSS, a highly customizable, low-level CSS framework, continually includes new features for creating sophisticated designs with ease. For instance, one of the recurring topics across sources was the addition of new classes, utilities, or plugins like flexbox, grid, spacing, and typography for enhancing user-interface designs.

Similar to SvelteKit, the Tailwind CSS official website includes a 'What's New' section, regularly updated with details of innovative features and upgrades. Discord Channels and GitHub repositories are also excellent sources to stay at the forefront of Tailwind CSS enhancements.

Community Resources and Tools for SvelteKit and Tailwind CSS

Communities revolving around SvelteKit and Tailwind CSS prove instrumental for mastering web-development using these tools. Here, fellow developers with varying degrees of experience come together to discuss, learn and share insights around these technologies. They often include guides and resources, like the usage of specific VSCode extensions, improving the development experience with tools like Prettier, or the implementation of best coding practices.

Online platforms like, StackOverflow, or even Medium, house numerous articles and queries that provide more detailed guides, often providing step-by-step instructions, configurations, and other user-tutorials. Such resources, paired with the official documentation, can significantly improve your understanding and the overall development experience with SvelteKit and Tailwind CSS.

Pros and Cons of Using SvelteKit with Tailwind CSS

Let's dive into the last section of our article where we will explore the benefits and potential drawbacks of combining SvelteKit and Tailwind CSS. To make an informed decision, it's crucial to understand what exactly these tools bring to the table and how they might impact your web development workflow.

The Benefits of Using SvelteKit and Tailwind CSS

There are several benefits to using SvelteKit and Tailwind CSS. For a start, SvelteKit is designed to offer an SEO-friendly, server-side rendered solution. It is lightweight yet powerful, capable of building high-performance applications with no extra hassle.

Tailwind CSS, on the other hand, provides a highly customizable, utility-first approach to CSS. It promotes fast prototyping and unique designs with minimal effort. Moreover, it allows developers to maintain consistency and reusability across their project.

The match between SvelteKit and Tailwind CSS is a winning combination. Their streamlined tooling and minimalistic approach allow for a highly efficient and enjoyable development process.

Potential Drawbacks of Integrating SvelteKit with Tailwind CSS

Despite their many strengths, using SvelteKit and Tailwind CSS isn't without potential drawbacks. Tailwind CSS's utility-first approach can lead to verbose and less readable HTML when complex styles are involved. Additionally, integrating Tailwind CSS with SvelteKit isn't always straightforward due to the unique way Svelte treats styles.

On the other hand, SvelteKit, despite its many advantages, is a young framework. This means it has a smaller community compared to more established alternatives like React or Vue. This can sometimes lead to fewer resources and longer issue resolution times.

Making an Informed Decision: SvelteKit and Tailwind CSS

Considering the pros and cons is part of making an informed decision. If you appreciate streamlined workflows and efficient tooling, SvelteKit's minimalistic and reactive approach paired with Tailwind CSS's powerful utility-centric styling could be your dream come true. Yet, you must keep in mind the potential drawbacks like less readable HTML and smaller community.

Remember, the choices you make should align with the demands of your project and the preferences of your team. It's always good to weigh other alternatives and experiment with different technological combinations to find the one that suits you best.

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