What’s new in Svelte: July 2025

Whether you’re trying out Vite 7, vitest browser mode or remote functions, there’s lots of experimental features to try this month.

Plus, a bunch of new blog posts and libraries to try in the Showcase.

Let’s dive in!

What’s new in Svelte and SvelteKit

• $inspect.trace now includes source name logging to make it easy to find which file the log came from (svelte@5.34.0, Docs, #16060)
• The latest version of SvelteKit now supports Vite 7 and Rolldown. Compilation should be faster using Rolldown, but with larger bundle sizes until additional tree-shaking is implemented in Rolldown (kit@2.22.0, Docs, #13747)

For a full list of bug fixes in Svelte, SvelteKit and its adapters, check out their CHANGELOGs here and here.

What’s new in the CLI and Language Tools

• The sv CLI now supports Vite’s browser mode in Vitest - allowing you to run your tests in the browser natively (cli@0.8.12, Docs, #588)
• The language server now makes it easier to search for symbol names (Ctrl + T in VSCode). Some of the handling is also synced to the Svelte TypeScript plugin so that it’s more consistent, which also means vscode can better deduplicate the results from both tsserver and Svelte language server (extensions@109.9.0, #2769)

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Community Showcase

Apps & Sites built with Svelte

• Planet Poster is an interactive art work inspired by a poster of, you guessed it, planets
• roomy-worlds lets you create small 3d worlds and share/edit with your community
• Prodcast lets you discover products curated from your favorite podcasts
• Distill automates company and industry monitoring with all news, updates, and summarized insights in one place

Learning Resources

Featuring Svelte Contributors and Ambassadors

• $effect is fine but proxies are better by Paolo Ricciuti

This Week in Svelte

• Ep. 106 — Changelog
• Ep. 107 — svelte-lexical

To Watch/Read

• Sveltest is a guide to set up testing for Svelte 5 applications using the experimental vitest-browser-svelte library
• A Playful Onboarding: Your first interactive animation from A to Z by Director.design
• Migrating from @testing-library/svelte to vitest-browser-svelte by Scott Spence
• Why Silicon Valley CTOs Are Secretly Moving Away from React by Freedium
• Async Local Storage by Ross Robino

Libraries, Tools & Components

• shadcn-svelte v1 - after 11 months in pre-release (@next), shadcn-svelte has officially hit v1.0. Congrats!
• Quaff is a component library for Svelte that follows the Material Design 3 guidelines
• Svelte Polaris is port of Shopify’s design system to build Shopify apps
• Origin UI is a collection of copy-and-paste components for quickly build application UIs
• Svelte 5 MCP Server is a specialized Model Context Protocol (MCP) server for Svelte 5 frontend development
• Frizzante is a minimalistic and opinionated web server framework written in Go that uses Svelte to render pages
• Storybook 9 is out now and includes updates to the Svelte CSF story format to support Svelte 5

That’s it for this month! Let us know if we missed anything on Reddit or Discord.

Until next time 👋🏼!