canirequire › CommonJS › xlsx
Is xlsx ESM-only? Can you require() it?
SheetJS Spreadsheet data parser and writer
Last verified Sep 9, 2026 against xlsx@0.18.5. JSON
CommonJS CommonJS — require() works on every Node.js version
xlsx ships CommonJS only. require("xlsx") works everywhere. import "xlsx" 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.
It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.
Does xlsx@0.18.5 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("xlsx") from a CommonJS file and import "xlsx" from an ES module.
| Runtime | require("xlsx") | import "xlsx" |
|---|---|---|
| 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 xlsx
ES modules (import)
import xlsx from "xlsx";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 xlsx = require("xlsx");Module format by version
Derived from the type, main and exports fields of every stable release on npm (108 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 0.11.15 – 0.18.5 | CommonJS | Dec 25, 2017 |
Frequently asked
Is xlsx ESM-only?
xlsx@0.18.5 is a CommonJS package. xlsx ships CommonJS only. require("xlsx") works everywhere. import "xlsx" 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 xlsx with ES module syntax?
Yes. import xlsx from "xlsx" 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 xlsx work in Bun?
Yes. import "xlsx" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does xlsx ship TypeScript types?
Yes. xlsx bundles its own type declarations; no @types package is needed.
Links
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