Web framework Svelte delivers 'most significant release' yet
Briefly

"Because the compiler shifts a lot of the work out of the browser and into npm run build, Svelte apps are small and fast. But beyond that, Svelte is designed to be an enjoyable and intuitive way to build apps: it prioritises getting stuff done."
"The latest iteration of the web framework arrives as a ground-up rewrite, promising improved performance, reduced bundle sizes, and enhanced reliability. Despite these substantial changes, the framework maintains near-complete backwards compatibility with Svelte 4, ensuring a seamless transition for most developers."
"A key innovation in Svelte 5 is the introduction of 'runes', an explicit mechanism for declaring reactive state. This addresses limitations in the previous version's compiler-driven reactivity system, where changing a single property would invalidate entire objects."
"The update introduces native TypeScript support, eliminating the need for preprocessors, and implements significant improvements to component composition. Event handlers are now treated as standard props, offering enhanced flexibility for library authors and developers working on larger applications."
Read at Developer Tech News
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