What You Need to Know About the Svelte Framework

November 30, 2023

What You Need to Know About the Svelte Framework

Research done by Marielle

Not every day, the tech industry gets buzzed with new technologies. Why? Because they pop up like crazy. However, only a few of them have gained significant traction, and Svelte is one of them.

What exactly is Svelte? And what makes it stand out from the rest? This article will give you everything you need to know about the Svelte framework.

What is Svelte?

Svelte is a new approach to web application development. This relatively new framework offers a fresh way to build web applications. It is often praised for its innovative concepts and unique features.

At its core, Svelte is a game-changing framework that goes beyond the ordinary. It works its magic by compiling your code into efficient JavaScript during the build process, transforming declarative components into code that surgically updates the DOM.

Since its beta release in 2001, Svelte has quickly become the darling of the developer community, earning the title of the “most loved JavaScript framework.” Unlike other monolithic libraries, Svelte takes a different path. It compiles HTML templates to specialized code that directly manipulates the DOM, resulting in smaller file sizes and superior client performance.

But that’s not all! Svelte’s compiler doesn’t stop at just optimizing your code. It also inserts clever calls to automatically recompute data and re-render UI elements whenever the underlying data changes. This ingenious technique eliminates the overhead associated with runtime intermediate representations like the virtual DOM, unlike traditional frameworks like React and Vue. In fact, Svelte’s bundle footprint is one of the smallest among comparable frontend libraries, weighing in at a mere 2KB.

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Benefits of Svelte

Svelte offers several benefits that make it stand out from other front-end frameworks. Here are some of them:

Ease of use

Instead of doing most of the heavy lifting in the browser, Svelte does its thing when you build the app and compile it to efficient vanilla JavaScript.

Fast turnaround

It cuts down on the unnecessary overhead of the JavaScript framework you’re using. When you compile Svelte to vanilla JavaScript, it boosts code readability, allows for re-use, and makes your web app much faster.

Efficient DOM manipulation

Svelte does not require declarative, state-driven code, which the browser has to convert into DOM operations. That means you don’t need to use virtual DOM anymore.

The Svelte ecosystem quote

Downsides of Svelte

If you want to build Svelte apps, you have to know its limitations. Some of them are:

New and small community

The Svelte ecosystem, while growing, is still smaller compared to more established frameworks. This leads to fewer third-party libraries and resources.

Risky to use in large-scale projects

Some larger organizations might hesitate to adopt a newer framework like Svelte due to its relative novelty.

Steep learning curve

Although Svelte is easier to pick up compared to other frameworks, it might still feel challenging for those who are new to web development.

How to Install Svelte

Installing Svelte is a fairly simple process. Below are the basic installation steps:

Install Node.js

Svelte uses Node.js to compile your code, so make sure you have the latest version installed on your machine.

Install the Svelte CLI (Command Line Interface)

Use the command `npm create svelte@latest my-svelte-app` to install the latest Svelte version.

Installing Svelte CLI

Get familiar with its application structure

Svelte operates on a single-file approach, which means that you have everything you need to run your app in a single .svelte file. This setup simplifies the development process and improves performance.

Svelte Application Structure

Use Cases for Svelte

Svelte is great for building small components or even entire applications. The real power of this framework shines when you’re creating super-fast web apps with slick user interfaces. If that’s what your business is all about, then Svelte might just be the framework you’re looking for.

Here are some examples of successful Svelte applications:

  • Web apps for low-power devices: Svelte-built apps have smaller bundle sizes, perfect for devices with slow networks and limited processing power. Less code means fewer KBs to download, parse, execute, and keep hanging around in memory.
  • Highly interactive pages or complex visualizations: If you’re creating data visualizations that have to show a bunch of DOM elements, using a framework with no runtime overhead will make sure that user interactions feel quick and responsive.
  • Onboarding devs with basic web development knowledge: Svelte is pretty beginner-friendly. Web devs who know their way around HTML, CSS, and JavaScript can quickly pick up Svelte specifics and start building web apps in no time.

Comparison between famous Javascript Frameworks and Svelte

TypeLibrary for web and native UIA frameworkA frameworkA framework
Why choose?Uses JavascriptUses JavascriptUses JavascriptUses Javascript and HTML
Supported byFacebookGoogleCommunityCommunity
Initial releaseMarch 2013September 2016November 2016February 2014
Data BindingOne wayTwo wayTwo wayTwo way
Widely used forModern web & native app development (iOS and Android)Large-scale and feature-rich app developmentWeb app developmentWeb and SPA development
Learning CurveEasier than AngularA steep learning curveSmall learning curveSmall learning curve
ModelBased on virtual DOM (flux)Based on MVCBased on MVMBased on virtual DOM (flux)
Community SupportLarge developer communities across the globeLarge community of developers and supportersLimited communityCommunity-driven project
Development SpeedNormalNormalFastNormal
TestingJestJasmine & KarmaSvelte Testing LibraryVitest, Jest, Cypress
PopularityWidely popular among developersWidely popular among developersMore than 73,000 stars added on GithubWidely popular among developers
Best AttractionVirtual DOMCapabilities like dependency injection and two-way data binding, along with the tech giant’s supportRapid prototyping, code reusabilityLightweight and good documentation
Companies usingSkype, Dropbox, Netflix and FacebookMicrosoft Office, Gmail, Forbes, UpWork, PaypalApple, New York Times, Spotify, NBA and many moreAdobo, Netflix, and Nintendo


In conclusion, Svelte has a major advantage: its exceptional performance. By compiling components into efficient JavaScript code during the build process, Svelte achieves faster runtime performance and smaller bundle sizes compared to frameworks that rely on interpreting templates at runtime. This means quicker initial load times and a smoother user experience.

Also, the JavaScript framework landscape is always changing, with new frameworks and libraries popping up, offering more options for developers. Each framework has its strengths and weaknesses, so the choice ultimately depends on specific use cases and project requirements.

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Hire Svelte Developers from StarTechUP

Svelte web apps take the best of JavaScript frameworks and combine them into one. So, you need Svelte developers with skills in HTML, CSS, and JavaScript. We are here to help.

At StarTechUP, we have a team of dedicated and experienced Svelte developers who can provide you with high-quality web apps tailored to your business needs. We also offer web development services in other popular frameworks, such as React, Angular, and Vue.

So, if you are looking to build a web application using Svelte or any other framework, let’s work together and create amazing web apps that your users will love.

Contact us today for your next project!

About the author: Andrea Jacinto - Content Writer

A content writer with a strong SEO background, Andrea has been working with digital marketers from different fields to create optimized articles which are informative, digestible, and fun to read. Now, she's writing for StarTechUP to deliver the latest developments in tech to readers around the world. View on Linkedin