Best of Svelte — December 2025

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    Article
    Avatar of svelteSvelte Blog·21w

    What’s new in Svelte: December 2025

    Svelte Society launched a new dynamic website featuring community content feeds and user submissions. SvelteKit 2.49.0 introduces file upload streaming in forms, while Svelte 5.45.0 adds a print API for AST-to-source conversion and a hydratable API for coordinating hydration. The Svelte CLI now supports adding add-ons during project creation. Apple's web-based App Store joins other Apple products built with Svelte. New community tools include better-svelte-email for email rendering, chain-enhance for sequential form actions, and various UI component libraries.

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    Article
    Avatar of hnHacker News·19w

    JSDoc *is* TypeScript

    JSDoc is not an alternative to TypeScript but rather a way to use TypeScript itself. The TypeScript language service powers IntelliSense and interprets JSDoc comments, meaning developers using JSDoc are already using TypeScript without a build step. The Svelte team's 2023 switch from .ts files to JSDoc wasn't anti-TypeScript but a different approach to the same static analysis. JSDoc offers nearly all TypeScript features (except runtime features like enums), provides better code navigation by jumping to actual implementations instead of declaration files, and works with existing TypeScript tooling including type generation libraries.

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    Article
    Avatar of newstackThe New Stack·17w

    Trends That Defined JavaScript in 2025

    JavaScript in 2025 saw a shift toward performance optimization and web standards, with developers questioning React's dominance as modern browsers matured. Signals emerged as a key reactivity pattern across Angular, Vue, Solid, and Svelte. Compilers took on more optimization work, with React Compiler and Svelte 5's Runes automating performance improvements. VoidZero launched Vite+ as a unified Rust-based toolchain to address JavaScript's fragmentation. AI integration moved to the frontend through MCP servers and browser-based machine learning libraries, while new frameworks like Hono, Mastro, and Wasp addressed specific use cases from edge computing to multipage apps.

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