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

ES2019 spec-compliant String.prototype.trimStart shim.

Last verified Sep 9, 2026 against string.prototype.trimstart@1.0.8. JSON

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

string.prototype.trimstart ships CommonJS only. require("string.prototype.trimstart") works everywhere. import "string.prototype.trimstart" 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
1.0.8 (Mar 21, 2024)
Module format
CommonJS
Last CommonJS version
1.0.8
TypeScript types
None
Node engines
>= 0.4
Weekly downloads
76.4M
License
MIT

Does string.prototype.trimstart@1.0.8 actually load? Runtime test results

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

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

ES modules (import)

import stringPrototypeTrimstart from "string.prototype.trimstart";

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 stringPrototypeTrimstart = require("string.prototype.trimstart");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (11 versions; the newest 11 shown).

VersionsFormatFirst published
0.0.1 – 1.0.8CommonJSDec 19, 2017

Frequently asked

Is string.prototype.trimstart ESM-only?

string.prototype.trimstart@1.0.8 is a CommonJS package. string.prototype.trimstart ships CommonJS only. require("string.prototype.trimstart") works everywhere. import "string.prototype.trimstart" 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.trimstart with ES module syntax?

Yes. import stringPrototypeTrimstart from "string.prototype.trimstart" 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.trimstart work in Bun?

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

Does string.prototype.trimstart ship TypeScript types?

No. string.prototype.trimstart ships no type declarations and there is no @types package for it.

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