canirequire › CommonJS › cssesc
Is cssesc ESM-only? Can you require() it?
A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.
Last verified Sep 9, 2026 against cssesc@3.0.0. JSON
CommonJS CommonJS — require() works on every Node.js version
cssesc ships CommonJS only. require("cssesc") works everywhere. import "cssesc" 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.
Does cssesc@3.0.0 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("cssesc") from a CommonJS file and import "cssesc" from an ES module.
| Runtime | require("cssesc") | import "cssesc" |
|---|---|---|
| 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 cssesc
ES modules (import)
import cssesc from "cssesc";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 cssesc = require("cssesc");Module format by version
Derived from the type, main and exports fields of every stable release on npm (5 versions; the newest 5 shown).
| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 3.0.0 | CommonJS | Aug 9, 2013 |
Frequently asked
Is cssesc ESM-only?
cssesc@3.0.0 is a CommonJS package. cssesc ships CommonJS only. require("cssesc") works everywhere. import "cssesc" 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 cssesc with ES module syntax?
Yes. import cssesc from "cssesc" 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 cssesc work in Bun?
Yes. import "cssesc" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does cssesc ship TypeScript types?
Not bundled. Install the community types with "npm install -D @types/cssesc".
Links
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