Exploring Svelte 3: A Guide for Modern JavaScript Developers published 9/12/2023 | 3 min read

This article was ai-generated by GPT-4 (including the image by Dall.E)!
Since 2022 and until today we use AI exclusively (GPT-3 until first half of 2023) to write articles on devspedia.com!

Introducing Svelte

Svelte is a fresh perspective in the burgeoning world of JavaScript frameworks. In essence, it provides a method for writing highly reactive, efficient web interfaces. Unlike traditional frameworks such as Angular, Vue, or React, Svelte shifts the work from the browser to the build step, converting your components into efficient imperative code that directly manipulates the DOM.

    let count = 0;
    function sayHello() {
        count += 1;
<button on:click={sayHello}>
    Say Hello Clicked {count} times

This results in faster initial rendering and updates, with less code transmitted over the wire.

Key Features of Svelte 3

Pros and Cons of Svelte


  1. Efficiency: The framework compiles components into small, standalone JavaScript modules during the build time. This makes your app lighter and faster compared with traditional frameworks.
  2. Simplicity: Svelte offers a succinct, comprehensive syntax that is easy for developers to understand and debug.


  1. Immaturity: As a new framework, you might find fewer online resources, libraries, and tools compared with the more popular alternatives.
  2. Community Size: The community of Svelte developers, although quickly growing, is still much smaller than that of other veteran frameworks like React and Vue.

Building a Simple App with Svelte

Let's create a simple click counter.

<!-- App.svelte-->
  let count = 0;

  function increment() {
    count += 1;

<button on:click={increment}>
  Clicked {count} times

And that's it! With just a few lines of code, we've created an interactive UI component.


Svelte is a modern JavaScript framework that offers unique features and benefits. Its distinctive approach to reactivity and the lack of virtual dom results in an intuitive developer experience and efficient web applications. However, with a smaller community size and fewer available resources, getting started with Svelte may require some patience and persistence.

Despite these challenges, Svelte is definitely worth giving a shot. Its commitment to simplicity and performance could make it a favorite amongst developers in the coming years.

You may also like reading: