get-intrinsic

library1.3.0jsnpmunverified

get-intrinsic (v1.3.0) provides a robust way to access JavaScript language-level intrinsics (e.g., %Array.prototype.push%) at runtime, caching them at first require. Maintained by ljharb and updated regularly, it is used internally by es-abstract and other ECMAScript polyfill libraries. Key differentiator: guarantees access even when intrinsics are deleted or overridden, with optional allowance for missing features. Published weekly, supports Node >=0.4.

testing

npm install get-intrinsic

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · GET-INTRINSIC

get-intrinsic

testingjavascriptv1.3.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

GetIntrinsic

✓ const GetIntrinsic = require('get-intrinsic')

✗ import GetIntrinsic from 'get-intrinsic'

CommonJS-only; not an ES module. ESM import fails because package has no 'exports' field or 'type': 'module'.

GetIntrinsic

✓ const GetIntrinsic = require('get-intrinsic'); GetIntrinsic('%Math.pow%')

✗ GetIntrinsic('%Math.pow%')

Always require the module before calling; do not destructure.

GetIntrinsic

✓ const GetIntrinsic = require('get-intrinsic'); GetIntrinsic('%Array.prototype.push%', true)

✗ const { '%Array.prototype.push%' } = require('get-intrinsic')

Second boolean argument allows return of undefined instead of throwing when intrinsic is missing. Not a named export.

Demonstrates requiring the module, accessing cached intrinsics, and using the allowMissing flag.

const GetIntrinsic = require('get-intrinsic'); // Static method console.log(GetIntrinsic('%Math.pow%')(2, 3)); // 8 // Instance method with monkey-patching protection const originalPush = GetIntrinsic('%Array.prototype.push%'); const arr = [1]; originalPush.call(arr, 2); console.log(arr); // [1, 2] // Simulate deletion - cached version still works delete Array.prototype.push; originalPush.call(arr, 3); console.log(arr); // [1, 2, 3] // Allow missing intrinsic console.log(GetIntrinsic('%Missing%', true)); // undefined

Debug

Known issues

gotchaESM import (import GetIntrinsic from 'get-intrinsic') does not work. Package exports CommonJS only.

fix

Use require('get-intrinsic') or configure bundler for CommonJS interop.

affects: >=1.0.0

gotchaIntrinsic names are case-sensitive and must match the spec exactly (e.g., %Math.pow% not %math.pow%).

fix

Refer to the ECMAScript specification for correct intrinsic names.

affects: >=1.0.0

gotchaThe second argument (allowMissing) only works for intrinsics that are allowed to be missing per spec. Some intrinsics always throw if not available.

fix

Check the implementation or spec for which intrinsics are optional.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'get-intrinsic'

Package not installed or required path incorrect.

fix

Run 'npm install get-intrinsic' and ensure require('get-intrinsic') without relative path.

TypeError: GetIntrinsic is not a function

Imported incorrectly via ES import or destructured wrong.

fix

Use const GetIntrinsic = require('get-intrinsic'); do not use import or destructure.

TypeError: %Array.prototype.push% is not a valid intrinsic

Intrinsic name misspelled or not recognized.

fix

Double-check spelling against ECMAScript spec; e.g., '%Array.prototype.push%' (case-sensitive).

get-intrinsic@1.2.0: The engine 'node' is incompatible with this module.

Node version too old (<0.4).

fix

Update Node to >=0.4.

Upgrade

Version history

1.3.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/ljharb/get-intrinsic ↗

packageget-intrinsic ↗

homepagehttps://github.com/ljharb/get-intrinsic#readme ↗