Absolutely! Here’s a beginner-friendly guide to Svelte, one of the most modern and beginner-welcoming JavaScript frameworks for building fast web apps.
š¶ What is Svelte?
Svelte is a JavaScript framework for building reactive user interfaces. Unlike React or Vue, Svelte compiles your code at build time ā not in the browser.
āSvelte shifts the work from the browser to the build step.ā
š Why Learn Svelte?
Feature | Benefit |
---|---|
ā” Fast Performance | No virtual DOM, minimal runtime |
š§ Simpler Syntax | Looks like plain HTML/CSS/JS |
š¦ Small Bundle Size | Svelte apps are tiny and fast |
š Built-in Reactivity | No need for useState() or this.setState |
š Easy to Learn | Great for beginners, even without framework experience |
š¦ Getting Started with Svelte
You can use SvelteKit (full-featured app framework) or plain Svelte.
ā Option 1: Try it online
Go to: https://svelte.dev/repl
Edit code and see changes instantly
ā Option 2: Install Locally
npm create vite@latest my-svelte-app -- --template svelte
cd my-svelte-app
npm install
npm run dev
You now have a live dev server running Svelte!
š§± Basic Svelte Syntax
š Hello World
<script>
let name = 'World';
</script>
<h1>Hello {name}!</h1>
Variables are reactive by default.
Curly braces
{}
are used to insert variables into the template.
š Reactivity with $
<script>
let count = 0;
function increment() {
count += 1;
}
</script>
<button on:click={increment}>
Clicked {count} times
</button>
No need for state hooks ā updates are automatic.
šÆ Reactive Statements
<script>
let a = 2, b = 3;
$: sum = a + b;
</script>
<p>{a} + {b} = {sum}</p>
$:
makessum
auto-update whena
orb
changes.
š§© If, Else, Each
{#if loggedIn}
<p>Welcome!</p>
{:else}
<p>Please log in.</p>
{/if}
<ul>
{#each todos as todo}
<li>{todo}</li>
{/each}
</ul>
šØ Scoped Styling
<style>
h1 {
color: crimson;
}
</style>
Styles are scoped to the component ā no global leakage.
š Svelte File Structure (Vite or SvelteKit)
src/
āā App.svelte # Root component
āā main.js # Mounts App to DOM
āā components/ # Your reusable .svelte files
š¦ Svelte vs React (Quick Comparison)
Feature | Svelte | React |
---|---|---|
JSX | No | Yes |
Virtual DOM | No | Yes |
Learning Curve | Easy | Moderate |
Bundle Size | Small | Larger |
Compilation | Build-time | Runtime |
ā When to Use Svelte
Small to medium apps or personal projects
Prototypes and fast MVPs
Static sites (via SvelteKit + adapter-static)
Simpler projects where React or Vue might feel like overkill
š Learn Svelte ā Recommended Resources
š¹ YouTube: āSvelte in 100 Secondsā ā Fireship
šÆ Summary
Svelte is:
ā
Reactive
ā
Fast
ā
Simple
ā
Beginner-friendly
Itās perfect for devs who want to write clean, modern web apps with less boilerplate.