Svelte

State of Svelte Wrap-up

Bruce Wiggleston
4 min read
State of Svelte Wrap-up
This article was written over 18 months ago and may contain information that is out of date. Some content may still be relevant, but please refer to official documentation for the latest information.

In this State of Svelte event, our panelists discussed updates, LTS releases, and APIs, with Node.js maintainers, technical steering committee members, and collaborators.

In this wrap-up, we will take a deeper look into these latest developments, and explore what is on the horizon for Svelte. You can watch the full State of Svelte event on the This Dot Media YouTube Channel.

Here is a complete list of the host and panelists that participated in this online event.

Hosts:

  • Tracy Lee, CEO, This Dot Labs, @ladyleet
  • Rob Ocel, Team Lead & Software Architect, @robocell

Panelists:

  • Scott Spence, Svelte Society, Developer Relations Engineer at Storyblok, @spences10
  • Brittney Postma, Founder Svelte Sirens & Software Engineer Design Systems at Provi, @BrittneyPostma
  • Geoff Rich, Senior Software Engineer, Ordergroove | Svelte Core Team, @geoffrich_
  • Simon Holthausen, Software Engineer at Vercel | Full-time Svelte maintainer, @dummdidumm_
  • Kevin Åberg Kultalahti, Co-founder & Technical Community Builder at Svelte Society, Main Organizer at Svelte Summit, @kevmodrome

Svelte 4

The chat got off to a great start with a discussion about Svelte 4, and what we can expect with that release. Simon spoke about how it will be more of a maintenance update than anything else.

This version of Svelte will raise the minimum required Node version and use newer versions of Typescript as well. There will also be other minor breaking changes, but the release will mainly be focused on internally updating the repository by converting it to a mono-repo. As soon as these updates are done, Simon said they will immediately begin work on Svelte 5.

Typescript and Svelte

Scott brings up the reasons for not using Typescript in Svelte. Simon said a decision was made to transition the Svelte repository from using Typescript to using Javascript.

There were questions about why types and type safety were being taken away from the repository. Simon clarified that the repository will be getting rid of .TS files, but they are not getting rid of type checking with Typescript, and the code will still be fully typed checked at the same level as before. The plan is to do it through JS Docs.

JS Docs provides the same level of type safety you get through Typescript, but there is no longer a need for a compile step when using JS Docs. There is also no need to ship any Source Maps, and it should be easier to debug.

Kevin also wanted to be clear that Typescript can still be used when building a Svelte app.

Why Svelte?

Rob notes that the official release of Svelte happened about 4 months ago, and asks the panelists how the launch has been going so far.

Kevin goes first, talking about how everyone with whom he has talked about it has been very excited about it. He talks about how the form actions and data loading are very popular. In other frameworks, you have to attach event listeners, and then do the fetching on clients. Svelte simplifies all of that, and allows you to get rid of a lot of code by using the features in Svelte.

Svelte REPL

Kevin talks about the Svelte REPL, and how it plays into why Svelte is getting so big. Svelte isn’t just easy, it’s the fact that it is social in the fact that you can share a REPL and show someone how to do something with Svelte. If you have an issue, you can usually find a solution in the Svelte REPL.

Server and Client

Geoff talks about this aspect of Svelte. He says that they were treated as two separate entities, and there was talk about how to make them more interconnected so that it’s easier to use the server data, and get it into components.

In SvelteKit, you have a load function in a separate file that defines how that data is loaded. Svelte also calls a JSON endpoint and then that component in the JSON data.

State Management

Geoff brings up the simple state management model that Svelte has, and they really don’t want to give that up by implementing too many things like short syntax.

Simon adds that there is no real reason to bloat the syntax in the Svelte files. He doesn’t want the interoperability that Svelte currently offers.

Signals vs Store

A question is brought up about Signals vs Store, and if they are the same. Simon talks more about how they are related, but they are not necessarily the same. He explains that the API for Store is a little more settled right now where the API for Signals is a little more in exploration.

Usability is also different because Signals is more primitive, and everything is composed of functions which you call in a certain way. With Stores, you wrap a store and map the values that are pushed into something different.

How the panelists found out about Svelte

The latter part of this event focused on how each panelist found Svelte and got involved with it. It was a very interesting part of the conversation to hear the backgrounds of each panelist, and why they got more and more involved with Svelte and everything that was going with it. It went very in depth, and would be worth exploring more by watching the conversation unfold on the event video.

Conclusion

The panelists were very engaged, and there was a lot of dialogue about Svelte and the exciting things being done. The panelists also finished by bringing up ways to get involved with the Svelte community. You can watch the full State of Svelte event on the This Dot Media Youtube Channel.

About the author

Bruce Wiggleston

Bruce Wiggleston

Developer Advocate

@brucerw3@BruceRW3

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