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Is function-bind ESM-only? Can you require() it?

Implementation of Function.prototype.bind

Last verified Sep 9, 2026 against function-bind@1.1.2. Markdown · JSON

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

function-bind ships CommonJS only. require("function-bind") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "function-bind" 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.

What to do

  1. require("function-bind") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import functionBind from "function-bind"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: npm install -D @types/function-bind
Latest
1.1.2 (Oct 12, 2023)
Module format
CommonJS
Last CommonJS version
1.1.2
TypeScript types
@types/function-bind
Node engines
not declared
Weekly downloads
141.3M
License
MIT

Does function-bind@1.1.2 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("function-bind") from a CommonJS file and import "function-bind" from an ES module.

Runtimerequire("function-bind")import "function-bind"
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 1.4.0✓ works✓ works

How to import function-bind

ES modules (import)

import functionBind from "function-bind";

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 functionBind = require("function-bind");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (6 versions; the newest 6 shown).

VersionsFormatFirst published
0.1.0 – 1.1.2CommonJSJun 16, 2013

Frequently asked

Is function-bind ESM-only?

function-bind@1.1.2 is a CommonJS package. function-bind ships CommonJS only. require("function-bind") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "function-bind" 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 function-bind with ES module syntax?

Yes. import functionBind from "function-bind" 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 function-bind work in Bun?

Yes. import "function-bind" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does function-bind ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/function-bind".

Links

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