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Is svelte-preprocess ESM-only? Can you require() it?

A Svelte preprocessor wrapper with baked-in support for commonly used preprocessors

Last verified Sep 9, 2026 against svelte-preprocess@6.0.5. JSON

CommonJS CommonJS — require() works on every Node.js version

svelte-preprocess ships CommonJS only. require("svelte-preprocess") works everywhere. import "svelte-preprocess" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Latest
6.0.5 (May 25, 2026)
Module format
CommonJS
Last CommonJS version
6.0.5
TypeScript types
Bundled
Node engines
>= 18.0.0
Weekly downloads
330K
License
MIT

Does svelte-preprocess@6.0.5 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("svelte-preprocess") from a CommonJS file and import "svelte-preprocess" from an ES module.

Runtimerequire("svelte-preprocess")import "svelte-preprocess"
Node.js 18✓ works✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4✓ works✓ works

How to import svelte-preprocess

ES modules (import)

import sveltePreprocess from "svelte-preprocess";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const sveltePreprocess = require("svelte-preprocess");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (172 versions; the newest 60 shown).

VersionsFormatFirst published
4.2.2 – 6.0.5CommonJSSep 16, 2020

Frequently asked

Is svelte-preprocess ESM-only?

svelte-preprocess@6.0.5 is a CommonJS package. svelte-preprocess ships CommonJS only. require("svelte-preprocess") works everywhere. import "svelte-preprocess" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import svelte-preprocess with ES module syntax?

Yes. import sveltePreprocess from "svelte-preprocess" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does svelte-preprocess work in Bun?

Yes. import "svelte-preprocess" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does svelte-preprocess ship TypeScript types?

Yes. svelte-preprocess bundles its own type declarations; no @types package is needed.

Links

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