With the shortest month of the year coming up, Svelte maintainers and community members alike have been busy this last month – from big changes in svelte-loader, prettier-plugin-svelte, rollup-plugin-svelte, and language-tools to steady progress in Sapper and svelte-preprocess. Meanwhile, lots of folks have been busy integrating Svelte with other popular frameworks.

New compiler features (#New-compiler-features)

• Aria roles from the WAI-ARIA Graphics Module (https://www.w3.org/TR/graphics-aria-1.0/#role_definitions) are now recognized as valid aria roles in Svelte components (3.31.1)

• Compiler warnings for the common React attributes, className and htmlFor, now make it easier to port React components to Svelte (3.31.1)

Have a suggestion for a compiler feature or want to help implement new features/bug fixes? Check out the “triage: good first issue” tag for Svelte (https://github.com/sveltejs/svelte/issues?q=is%3Aopen+is%3Aissue+label%3A%22triage%3A+good+first+issue%22)

New bits in language-tools (#New-bits-in-language-tools)

• User disabled auto import suggestions no longer show in VS Code (103.0.0)

• Renaming a variable is now safer with smart additions of a prefix/suffix to renamed variables (104.0.0)

• Semantic (token) highlighting for TypeScript users lets theme makers apply semantic styling in their themes, if they support it (104.0.0)

• “Extract Component” has been added to the context menu - allowing you to extract components out of files without having to open the command window to type “Svelte: Extract Component” (104.0.0)

• The VS Code extension now listens to JavaScript/TypeScript file changes - you no longer need to save the files for the changes to be noticed (104.1.0)

For the complete list of changes, check out the language-tools Releases page (https://github.com/sveltejs/language-tools/releases).

A great way to try the language tools is to download the Svelte Extension for VSCode (https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode). This extension provides syntax highlighting and rich intellisense for Svelte components in VS Code, using the svelte language server. Check your editor’s extension sources to see if there’s a Svelte plugin for your IDE or build your own (see coc-svelte (https://github.com/coc-extensions/coc-svelte) for example)!

Big improvements across the Svelte ecosystem (#Big-improvements-across-the-Svelte-ecosystem)

• svelte-loader (https://github.com/sveltejs/svelte-loader) released a major version, 3.0.0 - featuring Webpack 5 and Node 14 support, better hot reloading, and new compilerOptions to match rollup-plugin-svelte. Breaking changes include dropping Svelte 2 and Node 8 support. More info in the changelog (https://github.com/sveltejs/svelte-loader/blob/master/CHANGELOG.md)

• rollup-plugin-svelte (https://github.com/sveltejs/rollup-plugin-svelte) is now at version 7.x - with support for relative filenames, better handling of sourcemaps, and consistent compilerOptions. Be sure to checkout the changelog (https://github.com/sveltejs/rollup-plugin-svelte/blob/master/CHANGELOG.md) for breaking changes when upgrading

• svelte-preprocess (https://github.com/sveltejs/svelte-preprocess) iterated through some 4.6.x releases this month to improve postcss and scss handling and fix sourcemap transformation for typescript users. More info in the changelog (https://github.com/sveltejs/svelte-preprocess/blob/main/CHANGELOG.md)

• Sapper (https://github.com/sveltejs/sapper) got some improvements in scroll tracking and handling encoding query parameters. Dynamic imports also now work as expected in browsers that don’t support ES modules. These changes from 0.29.0 and a step-by-step migration guide can be found in the changelog (https://github.com/sveltejs/sapper/blob/master/CHANGELOG.md)

• prettier-plugin-svelte (https://github.com/sveltejs/prettier-plugin-svelte) version 2 was released. It received an overhaul and comes with a rewrite of the HTML formatting. The output is now much more in line with how standard Prettier formats HTML. Better defaults for svelteBracketNewLine and options-scripts-markup-styles should now match how the majority of users like to order the code blocks. Additionally, Prettier’s htmlWhitespaceSensitivity setting is now supported. More info in the changelog (https://github.com/sveltejs/prettier-plugin-svelte/blob/master/CHANGELOG.md)

New changes to the Svelte Society website include a new cheat sheet (https://sveltesociety.dev/cheatsheet) for easy access to useful code patterns and some smaller visual fixes across the site. Want to help make the Svelte Society website ready for prime time? Checkout the GitHub repo (https://github.com/svelte-society/sveltesociety.dev) to get started!

Community Showcase (#Community-Showcase)Apps & Sites (#Community-Showcase-Apps-Sites)

• The official German vaccination dashboard (https://impfdashboard.de/) tracks the current COVID vaccine rollout and features some well-done dataviz.

• La neuva era de la educatión conectada (https://elfuturoesapasionante.vodafone.es/especiales/educacion-conectada/) is a Vodaphone site that highlights the ways that technology and COVID-19 has changed the education landscape

• sho.rest (https://github.com/Melonai/shorest) is a self-hostable url shortener

• night.fm (https://night.fm/) is a cyberpunk-themed radio station

Demos, Libraries & Components (#Community-Showcase-Demos-Libraries-Components)

• Svelte Reactive Debugger (https://addons.mozilla.org/en-US/firefox/addon/svelte-reactive-debugger/) is a way to monitor Svelte reactive statements in Firefox devtools

• svelte-actions (https://github.com/sw-yx/svelte-actions) is a set of prototype Svelte actions for inclusion into official actions in future. See RFC (https://github.com/sveltejs/rfcs/pull/24) and Discuss High Level Policy (https://github.com/sw-yx/svelte-actions/issues/7).

• This css grid gallery (/playground/3a1b7fae13b242fe9cd4a4f7aa092fa4?version=3.31.2) made by @joja (in the Svelte Discord) features grid transitions based on a user’s mouse position

• Patchcab (https://github.com/spectrome/patchcab) is a modular Eurorack style synthesizer made with Web Audio.

• svelte-knob (https://github.com/MelihAltintas/svelte-knob) is a knob control to help with speedometer-style visualization

• descent-ripple (https://github.com/micha-lmxt/descent-ripple) is a highly customizable javascript ripple animation for buttons

• makeItSnow (https://github.com/florianlouvet/make-it-snow/blob/main/makeItSnowAction.js) is a Svelte action made by @MrPoule (in the Svelte Discord) that can be used to add ❄️snow❄️ to any component (Demo (/playground/de5223beb45540a5a11c9bd7b318304f?version=3.31.2))

• svelte-video-player (https://github.com/meigo/svelte-video-player) is a customizable VideoPlayer component

• svelte-readonly (https://github.com/Crisfole/svelte-readonly) is a very small store that exposes only a readable interface.

New Integrations & Starters (#Community-Showcase-New-Integrations-Starters)

• svelte-derver-starter (https://github.com/AlexxNB/svelte-derver-starter) is a starter for creating full-stack applications with the client based on Svelte and the server powered by Derver.

• eleventy-plugin-embed-svelte (https://github.com/shalomscott/eleventy-plugin-embed-svelte) makes it easy to embed Svelte components into an 11ty site.

• svelte-tailwind-extension-boilerplate (https://github.com/kyrelldixon/svelte-tailwind-extension-boilerplate) is a good foundation for a Chrome extension using either JavaScript or TypeScript, Svelte for the frontend, Tailwind CSS for styling, Jest for testing, and Rollup as the build system.

• snowpack-ui (https://github.com/rajasegar/snowpack-ui) lets you run & manage Snowpack projects from the browser instead of the terminal

• Svelte for Appwrite (https://dev.to/torstendittmann/svelte-for-appwrite-4fkg) explains how to integrate with Appwrite, a self-hosted Firebase alternative GitHub Repo (https://github.com/appwrite/sdk-for-svelte)

• here-maps-svelte (https://github.com/peopledrivemecrazy/here-maps-svelte) makes it easy to include HERE maps in a Svelte app

• p5-svelte (https://github.com/tonyketcham/p5-svelte) is an absolutely dead simple way of tossing the creative coding/sketching tool, p5, into a project

• svelte-windicss-preprocess (https://github.com/voorjaar/svelte-windicss-preprocess) is a Svelte preprocessor to compile tailwindcss at build time based on windicss compiler

• MitzaCoder/svelte-boilerplate (https://github.com/MitzaCoder/svelte-boilerplate) features configurations for TypeScript, TailwindCSS, IE11 compatibility (with Babel) and lazy loaded modules.

Want to share your Svelte Component with the world? Submit your own component (https://sveltesociety.dev/help/submitting?type=package) to the list of packages (https://sveltesociety.dev/packages) on the Svelte Society site.

Learning Resources (#Community-Showcase-Learning-Resources)

• lihautan’s Svelte Actions Playlist (https://www.youtube.com/watch?v=ciaMT_MswzE&list=PLoKaNN3BjQX3Gl14MBygFf8buPIw9pAeK) teaches how actions work and how they can help solve common problems when developing Svelte applications

• One-click Portfolio/Personal blog generator from dev.to API (https://dev.to/shriji/one-click-portfolio-personal-blog-generator-from-dev-to-api-3apb) walks through creating a Sapper site that also fetches your articles from DEV.to using the API

• How to Code a VSCode Extension (https://www.youtube.com/watch?v=a5DX5pQ9p5M) features Svelte as a way to render a custom UI within VSCode

• This YouTube series on Plenti (https://www.youtube.com/watch?v=wyNC7R_VVyQ&list=PLbWvcwWtuDm12y3Hye6oKDwI2gAS0ccHW) walks through the new static site generator in detail

See you next month! (#See-you-next-month)Want to add your work to the Showcase? Want to contribute to Svelte? Check out the Svelte Society (https://sveltesociety.dev/), Reddit (https://www.reddit.com/r/sveltejs/) and Discord (https://discord.com/invite/yy75DKs) to get involved!