John O'Keefe
e2c8ba10ce
- rating submitted doubled: the * 2 belonged to the retired 0-5 slider scale while StarInput already works in backend 0-10 units, so every rating arrived doubled (9 became 18, both backends rejected it); form value now passes through unscaled, display and words map already native 0-10 - StarInput gains an optional name prop rendering a hidden input, restoring the rating form field the old slider exposed; Rating passes name="rating" - table updates go immutable (new array every path): in-place mutation with the same reference never reliably invalidated the Svelte 5 $derived, which left the grid stale after successful submits; replace-or-append semantics unchanged - per-page dropdown reads the event value synchronously (Svelte 5 nulls currentTarget after dispatch, crashing the old read-inside-.then) - detail poster column shares a flex centering context so poster and stars align by construction at every width
Svelte + TS + Vite
This template should help get you started developing with Svelte and TypeScript in Vite.
Recommended IDE Setup
Need an official Svelte framework?
Check out SvelteKit, which is also powered by Vite. Deploy anywhere with its serverless-first approach and adapt to various platforms, with out of the box support for TypeScript, SCSS, and Less, and easily-added support for mdsvex, GraphQL, PostCSS, Tailwind CSS, and more.
Technical considerations
Why use this over SvelteKit?
- It brings its own routing solution which might not be preferable for some users.
- It is first and foremost a framework that just happens to use Vite under the hood, not a Vite app.
vite devandvite buildwouldn't work in a SvelteKit environment, for example.
This template contains as little as possible to get started with Vite + TypeScript + Svelte, while taking into account
the developer experience with regards to HMR and intellisense. It demonstrates capabilities on par with the
other create-vite templates and is a good starting point for beginners dipping their toes into a Vite + Svelte
project.
Should you later need the extended capabilities and extensibility provided by SvelteKit, the template has been structured similarly to SvelteKit so that it is easy to migrate.
Why global.d.ts instead of compilerOptions.types inside jsconfig.json or tsconfig.json?
Setting compilerOptions.types shuts out all other types not explicitly listed in the configuration. Using triple-slash
references keeps the default TypeScript setting of accepting type information from the entire workspace, while also
adding svelte and vite/client type information.
Why include .vscode/extensions.json?
Other templates indirectly recommend extensions via the README, but this file allows VS Code to prompt the user to install the recommended extension upon opening the project.
Why enable allowJs in the TS template?
While allowJs: false would indeed prevent the use of .js files in the project, it does not prevent the use of
JavaScript syntax in .svelte files. In addition, it would force checkJs: false, bringing the worst of both worlds:
not being able to guarantee the entire codebase is TypeScript, and also having worse typechecking for the existing
JavaScript. In addition, there are valid use cases in which a mixed codebase may be relevant.
Why is HMR not preserving my local component state?
HMR state preservation comes with a number of gotchas! It has been disabled by default in both svelte-hmr
and @sveltejs/vite-plugin-svelte due to its often surprising behavior. You can read the
details here.
If you have state that's important to retain within a component, consider creating an external store which would not be replaced by HMR.
// store.ts
// An extremely simple external store
import { writable } from 'svelte/store'
export default writable(0)