[16] A part of this release was an internal rewrite from TypeScript back to JavaScript, with JSDoc annotations.

[9] This was met with a confusion from the developer community, which was addressed by the creator of Svelte, Rich Harris.

[21] Svelte 5 was initially met with controversy due to its many changes, and thus deprecations caused primarily by runes.

[12] Rich Harris and Simon Holthausen joined Vercel to work on Svelte fulltime in 2022.

[24] Dominic Gannaway joined Vercel from the React core team to work on Svelte fulltime in 2023.

Svelte's core features are accessed through runes, which syntactically look like functions, but are used as macros by the compiler.

This syntax can also be used in element attributes for uses such as two-way data binding, event listeners, and CSS styling.

[29] The Svelte maintainers also maintain a number of integrations for popular software projects under the Svelte organization including integrations for Vite, Rollup, Webpack, TypeScript, VS Code, Chrome Developer Tools, ESLint, and Prettier.

[31][32] Svelte has been adopted by a number of high-profile web companies including The New York Times, Apple, Spotify, Radio France (French national public radio broadcaster),[33] Square, Yahoo, ByteDance, Rakuten, Bloomberg, Reuters, Ikea, Facebook, FrontPopulaire-2024 and Brave.