
Security News
The Hidden Blast Radius of the Axios Compromise
The Axios compromise shows how time-dependent dependency resolution makes exposure harder to detect and contain.
The next small thing in web development, powered by Svelte.
Sapper is a framework for building high-performance universal web apps. Read the guide or the introductory blog post to learn more.
Sapper's successor, SvelteKit, is currently available for use. Please see the FAQ for more details.
Clone the starter project template with degit... When cloning you have to choose between rollup or webpack:
npx degit "sveltejs/sapper-template#rollup" my-app
# or: npx degit "sveltejs/sapper-template#webpack" my-app
...then install dependencies and start the dev server...
cd my-app
npm install
npm run dev
...and navigate to localhost:3000. To build and run in production mode:
npm run build
npm start
Pull requests are encouraged and always welcome. Pick an issue and help us out!
To install and work on Sapper locally:
git clone https://github.com/sveltejs/sapper.git
cd sapper
npm install
npm run dev
You can make changes locally to Sapper and test it against a local Sapper project. For a quick project that takes almost no setup, use the default sapper-template project. Instruction on setup are found in that project repository.
To link Sapper to your project, from the root of your local Sapper git checkout:
cd sapper
npm link
Then, to link from sapper-template (or any other given project):
cd sapper-template
npm link sapper
You should be good to test changes locally.
npm run test
FAQs
The next small thing in web development, powered by Svelte
The npm package sapper receives a total of 24,956 weekly downloads. As such, sapper popularity was classified as popular.
We found that sapper demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Security News
The Axios compromise shows how time-dependent dependency resolution makes exposure harder to detect and contain.

Research
A supply chain attack on Axios introduced a malicious dependency, plain-crypto-js@4.2.1, published minutes earlier and absent from the project’s GitHub releases.

Research
Malicious versions of the Telnyx Python SDK on PyPI delivered credential-stealing malware via a multi-stage supply chain attack.