Registry / devops / sapper-limited-minifier

sapper-limited-minifier

library0.28.10jsnpmunverified

Sapper is a framework for building high-performance universal (SSR) web applications with Svelte, similar to Next.js. It provides file-based routing, server-side rendering, code splitting, and offline support via service workers. The current stable version is 0.28.10, but development has shifted to SvelteKit (the successor). Sapper uses Rollup or Webpack for bundling and requires Svelte ^3.17.3 as a peer dependency. It is now in maintenance mode; new projects should use SvelteKit instead.

devops

npm install sapper-limited-minifier

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · SAPPER-LIMITED-MIN

sapper-limited-minifier

devopsjavascriptv0.28.10

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default (start function)

✓ import sapper from '@sapper/server';

✗ const sapper = require('@sapper/server');

Sapper is ESM-only; CommonJS require may fail or produce undefined.

middleware

✓ import { middleware } from '@sapper/server';

✗ const { middleware } = require('@sapper/server');

Direct import of middleware function for Express/Polka integrations.

stores (session, page, preloading)

✓ import { stores } from '@sapper/app';

✗ import { stores } from 'sapper';

Client-side stores are exported from '@sapper/app', not the main package.

Shows minimal Express server setup with Sapper middleware for SSR and client-side routing.

// server.js (Express) import express from 'express'; import sapper from '@sapper/server'; import { middleware } from '@sapper/server'; const app = express(); app.use(sapper()); app.listen(process.env.PORT || 3000);

Debug

Known issues

deprecatedSapper is deprecated in favor of SvelteKit. New projects should use SvelteKit.

fix

Migrate to SvelteKit (https://kit.svelte.dev) for continued support and new features.

affects: >=0.28.0

gotchaSapper's middleware import differs between client and server code.

fix

Use '@sapper/app' for client-side code and '@sapper/server' for server-side code.

affects: *

breakingSapper 0.28 dropped support for Rollup config export pattern.

fix

If using a custom Rollup config, ensure it exports an array, not a function returning an array.

affects: >=0.28.0

gotchaService worker must be a separate entry point named 'service-worker.js' in the src directory.

fix

Place service worker at src/service-worker.js; do not import inside Svelte components.

affects: *

gotchaSapper does not support dynamic imports inside Svelte components for code splitting; it splits pages automatically.

fix

Use Sapper's built-in code splitting via file-based routing, not manual dynamic imports in components.

affects: *

Errors

Common errors & fixes

Cannot find module '@sapper/server'

Misconfigured path or missing dependency.

fix

Ensure '@sapper/server' is installed: npm install @sapper/server. For SvelteKit projects, use 'svelte' package instead.

export { default as sapper } from '@sapper/server'; // not working

Sapper does not export default from the server package after version 0.28.

fix

Use named exports: import { middleware } from '@sapper/server'; or import sapper from '@sapper/server'; (default export)

Uncaught SyntaxError: Unexpected token 'export'

Trying to use ESM in a CommonJS only context (e.g., Node.js without --experimental-modules or type: module).

fix

Set 'type': 'module' in package.json or use Node >=14 with --experimental-modules.

Cannot read property 'page' of undefined (stores context)

Trying to access stores (e.g., stores().page) outside of a Svelte component that is rendered by Sapper.

fix

Only call stores() inside a Svelte component that is part of a Sapper page (e.g., .svelte files in routes/).

Upgrade

Version history

0.28.10latest on npm

Audit

Dependencies

svelterequiredPeer dependency; Sapper requires Svelte ^3.17.3 to compile components.

Agent activity

5 hits · last 30 days

node

Resources

githubhttps://github.com/awilts/sapper ↗

packagesapper-limited-minifier ↗

homepagehttps://github.com/sveltejs/sapper#readme ↗