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Hover-prefetch has two surfaces in SvelteKit: - data-sveltekit-preload-data (route loader data) - data-sveltekit-preload-code (route JS chunks) The original fix turned off only the loader-data side. Route-code chunks prefetched on hover can also include manually-mocked module URLs; an in-flight code prefetch landing after iframe teardown hits the same Playwright route handler that resolves manual mocks, raising the unhandled rejection. Disable both surfaces. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
sv
Everything you need to build a Svelte project, powered by sv.
Creating a project
If you're seeing this, you've probably already done this step. Congrats!
# create a new project in the current directory
npx sv create
# create a new project in my-app
npx sv create my-app
Developing
Once you've created a project and installed dependencies with npm install (or pnpm install or yarn), start a development server:
npm run dev
# or start the server and open the app in a new browser tab
npm run dev -- --open
Building
To create a production version of your app:
npm run build
You can preview the production build with npm run preview.
To deploy your app, you may need to install an adapter for your target environment.