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Is string.prototype.trim ESM-only? Can you require() it?

ES5 spec-compliant shim for String.prototype.trim

Last verified Sep 9, 2026 against string.prototype.trim@1.2.11. JSON

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

string.prototype.trim ships CommonJS only. require("string.prototype.trim") works everywhere. import "string.prototype.trim" 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
1.2.11 (Jun 5, 2026)
Module format
CommonJS
Last CommonJS version
1.2.11
TypeScript types
@types/string.prototype.trim
Node engines
>= 0.4
Weekly downloads
75.8M
License
MIT

Does string.prototype.trim@1.2.11 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("string.prototype.trim") from a CommonJS file and import "string.prototype.trim" from an ES module.

Runtimerequire("string.prototype.trim")import "string.prototype.trim"
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 string.prototype.trim

ES modules (import)

import stringPrototypeTrim from "string.prototype.trim";

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 stringPrototypeTrim = require("string.prototype.trim");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (16 versions; the newest 16 shown).

VersionsFormatFirst published
1.0.0 – 1.2.11CommonJSAug 9, 2015

Frequently asked

Is string.prototype.trim ESM-only?

string.prototype.trim@1.2.11 is a CommonJS package. string.prototype.trim ships CommonJS only. require("string.prototype.trim") works everywhere. import "string.prototype.trim" 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 string.prototype.trim with ES module syntax?

Yes. import stringPrototypeTrim from "string.prototype.trim" 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 string.prototype.trim work in Bun?

Yes. import "string.prototype.trim" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does string.prototype.trim ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/string.prototype.trim".

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