What is Svelte and why should you use it in your business?

In the world of frontend development, it seems a new "must-have" tool appears every day. Some of these tools prove to be important in the enterprise software development lifecycle, while others fade away and are forgotten over time.
One area of frontend development where new tools constantly emerge is frameworks. Regardless of the language you use, there are numerous frameworks available to users. Some are very useful, while others are at best redundant.
That's exactly the case with JavaScript. The reason for the multitude of JavaScript frameworks is simple: JavaScript is one of the most widely used languages on the planet. Since JS is considered essential for interactive applications and websites, the language is on everyone's mind. Consequently, there are many frameworks.
One such JavaScript framework is Svelte. One of Svelte's main goals is to help developers create reactive applications. What is a reactive application? Whenever a value changes in the application (e.g., when a user inputs data), that value is automatically reflected in the Document Object Model (DOM). The DOM is a logical tree structure representing the HTML page rendered in a browser or application.

Reactive applications are very important for modern use because they allow updating parts of a web page or application without refreshing the entire page. This is drastically different from the old approach (where you had to reload the entire page to update a section of the page or application).
Thus, every JavaScript developer focuses on building reactive frontends.
Svelte takes a completely different approach to this. Simply put, Svelte compiles your code at build time, so only pure JavaScript that modifies the DOM reaches the browser. This functionality eliminates the framework by the time the application code reaches the browser.
Thus, Svelte application components (such as HTML, CSS, and JavaScript) are combined into .svelte files, the DOM is always synchronized with the application state, applications are compiled into tiny framework-free JavaScript at build time, and can be used both for developing standalone applications and in combination with other applications. All of this together allows for creating incredibly fast JS applications.

Advantages of Svelte

The advantages of Svelte should already be obvious. But that's not all. By adopting this new framework, your developers will gain certain advantages over other tools. These advantages include:

• Less boilerplate code, allowing developers to focus on building solutions.
• Reactive variables can be easily created by simply adding $: at the beginning of the declaration.
• No more virtual DOM, so applications are faster and more reliable.
• Instead of CSS, developers use scoped styling with JavaScript, allowing styles to be included in the middle of a document, targeting a specific element and its children.
• Includes its own minimal state management solution.
• No traces of the framework remain in compiled applications.
• Svelte applications run significantly faster than those on other frameworks.

Disadvantages of Svelte

However, there are also a few disadvantages to using Svelte, which include:

• Much smaller community compared to other frameworks.
• Lack of serious support.
• Lack of IDE support.
• Few toolkits available for Svelte developers.
• Very small open-source ecosystem.

If your developers can do their work without requiring much support, then Svelte will be a great option for them to build highly reactive applications. If they tend to rely heavily on support and community, then Svelte may not be the best choice (yet). However, give the framework time, and a community will form around it.

What can you build with Svelte?

Svelte can be used both for building small parts of an application and for building the entire application. The greatest benefit from this framework can be achieved when creating fast web applications with user-friendly interfaces. If your business aims for that, Svelte might be the framework you need.
To get started with Svelte, developers need a basic understanding of HTML, CSS, and JavaScript. That's it. With these skills, your developers are ready to start with Svelte. And with an easy-to-use tutorial, they'll quickly get up to speed.
Take, for example, a simple Hello, World application written in Svelte, which looks like this:

<script>
   let name = 'world'; 
</script> 

<h1>Hello {name}!</h1>

It's that simple.

Conclusion

Svelte is a new interesting approach to JavaScript that allows creating incredibly reactive and fast applications. If you want to help your developers take your websites or web applications to a new level of performance and simplicity, Svelte should be on your radar.