canirequire › Dual (CommonJS + ESM) › psl
Is psl ESM-only? Can you require() it?
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Last verified Sep 9, 2026 against psl@1.15.0. JSON
Dual (CommonJS + ESM) Dual package — both require() and import work
psl publishes both a CommonJS entry and a native ESM entry (ESM added in 1.11.0). require("psl") and import "psl" both work on every supported Node.js version and in Bun.
Does psl@1.15.0 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("psl") from a CommonJS file and import "psl" from an ES module.
| Runtime | require("psl") | import "psl" |
|---|---|---|
| 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 psl
ES modules (import)
import psl from "psl";CommonJS (require)
const psl = require("psl");Module format by version
Derived from the type, main and exports fields of every stable release on npm (52 versions; the newest 52 shown).
| Versions | Format | First published |
|---|---|---|
| 1.13.0 – 1.15.0 | Dual (CommonJS + ESM) | Nov 21, 2024 |
| 1.12.0 | CommonJS | Nov 21, 2024 |
| 1.11.0 | Dual (CommonJS + ESM) | Nov 21, 2024 |
| 1.0.0 – 1.10.0 | CommonJS | Oct 14, 2014 |
Frequently asked
Is psl ESM-only?
psl@1.15.0 ships CommonJS and ESM builds. psl publishes both a CommonJS entry and a native ESM entry (ESM added in 1.11.0). require("psl") and import "psl" both work on every supported Node.js version and in Bun.
Can I require psl?
Yes. psl ships a CommonJS entry, so require("psl") works on every Node.js version, alongside the native ESM entry for import.
Does psl work in Bun?
Yes. import "psl" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does psl ship TypeScript types?
Yes. psl bundles its own type declarations; no @types package is needed.
Links
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