Supercharge Web DX in Svelte way

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Supercharge Web DX in Svelte way

Posted on : 2022-02-20
Posted by : Ashik, Blockchain Intern

What is Svelte & SvelteKit?

There are tons of great resources and tutorials out there, so here just a high-level introduction.

Svelte is a component framework that allows you to break up your application into reusable chunks. Svelte compiles itself away during the build process into vanilla html, css, and javascript.

SvelteKit is a Svelte framework for building web applications of all sizes, with a beautiful development experience and flexible filesystem-based routing.

How Svelte saves developer's mental fatigue?

1. Less Javascript & boilerplate


This is my true feeling. Why should I write lines of code just to update a value? Reactivity, this is all I need. Svelte really gives me productivity to focus on designing great UX but don't compromise on DX.

2. Svelte Store - Native State Management

I totally get the "goodness" of immutability, especially after I learned how redux works. Even I switched to RTK - Redux ToolKit later, I still feel awful to write so many codes JUST to update a value safely in React.

Reactivity shines again, svelte store is easy to use and customizable. Co-worker and future self can easily understand it's a store with a $ prefix. I didn't feel a pain to manage global stores when my Svelte project scaled.

3. HTML & CSS as a first class citizen

You can write native html & css (scoped) without a pain. That's a huge win for me because I just don't like className & CSS-in-JS.

Svelte released style directives in 3.46 which provides handy syntax sugar to write dynamic styles. You can check Geoff's (Svelte maintainer) article for use cases.

4. SvelteKit - Go-to framework to build Svelte app

React is a javascript library but not a framework, which means you need to figure out how to build your app properly. I believe for most React beginners, what we need is a single recommendation but not paradox of choice. What is the best option which gives me overall the best outcome with least amount of trade-offs?

So I was excited when I found SvelteKit is the go-to framework in Svelte world. Here are features I love about SvelteKit:

  • Filesystem-based Routing: It's way easier to understand and use compare to React Router.

  • Layout: It's a component that you can put elements that should be visible on every page, such as top-level navigation or a footer. It's really convenient and easier to manage your global layout and route content.

  • Adapters: My purpose is to build each service to SPA at the first stage of migration. adapter-static is a great fit to build SPA and I can easlily switch to other adapters depends on our requirement in the future

// svelte.config.js
import preprocess from 'svelte-preprocess'
import adapter from '@sveltejs/adapter-static'

/** @type {import('@sveltejs/kit').Config} */
const config = {
    // Consult
    // for more information about preprocessors
    preprocess: [preprocess({
        postcss: true

    kit: {
        // I can even build php file which I can use in current project seamlessly!
        adapter: adapter({
            fallback: 'myapp.php' 
        files: {
            assets: 'src/assets',
        appDir: 'myapp',

export default config
  • Use Vite under the hood: As I mentioned earlier, Vite had saved me from javascript tooling hell. After two months development in SvelteKit, everything works like a charm.

5. Svelte Community

I think this is the most important reason that I love Svelte so much, and it's definately part of the DX.