Registry / serialization / lodash.constant

lodash.constant

library3.0.0jsnpmunverified

lodash.constant is a standalone npm package providing the `_.constant` utility function, designed for the Lodash v3 ecosystem. It delivers a function that, when called, consistently returns the same, unchanging value that was initially passed to it. This module, currently at version 3.0.0, was last published in January 2015, effectively freezing its functionality to align with the Lodash 3.x release series. While stable for older CommonJS environments, it is not actively maintained and does not receive updates or security patches from the ongoing development of the main Lodash library (which is currently at v4.x and has a healthy, active release cadence). For modern applications targeting Lodash v4+, direct imports like `import constant from 'lodash/constant';` or using `lodash-es` for ES module compatibility and tree-shaking are the recommended approaches, making this standalone module largely a legacy solution.

serialization

npm install lodash.constant

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · LODASH.CONSTANT

lodash.constant

serializationjavascriptv3.0.0

Install

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Import

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Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

constant

✓ import constant from 'lodash.constant';

✗ import { constant } from 'lodash.constant';

This package exports a default function. For modern Lodash (v4+), prefer `import constant from 'lodash/constant';` for better tree-shaking.

constant

✓ const constant = require('lodash.constant');

✗ const { constant } = require('lodash.constant');

This is the primary way to import this specific v3.0.0 standalone package in CommonJS environments, as it exports a default function.

✓ import constant from 'lodash/constant';

✗ import _ from 'lodash.constant'; // This package only exports constant

This package exports only the `constant` function. For the full Lodash library or other methods, import from `lodash` or `lodash-es` directly.

Demonstrates how to import and use the `constant` function, showing its consistent return value and immutability.

import constant from 'lodash.constant'; const getAnswer = constant(42); const getGreeting = constant('Hello, World!'); const getObject = constant({ id: 1, name: 'Test' }); console.log('The answer is:', getAnswer()); // Expected: The answer is: 42 console.log('The greeting is:', getGreeting()); // Expected: The greeting is: Hello, World! console.log('The object is:', getObject()); // Expected: The object is: { id: 1, name: 'Test' } // Demonstrating immutability for constants, modifying the returned object does not affect future calls const myObject = getObject(); myObject.name = 'Modified'; console.log('Original object after modification attempt:', getObject()); // Still { id: 1, name: 'Test' } console.log('Modified object:', myObject); // Expected: { id: 1, name: 'Modified' }

Debug

Known issues

breakingThis `lodash.constant` v3.0.0 package is based on Lodash v3.x and does not include the significant breaking changes introduced in Lodash v4.0.0 (released 2015) or later versions of the main `lodash` library. Migrating a project using this standalone module to a modern Lodash setup (v4+) will require updating import paths and potentially adapting to other Lodash v4+ API changes.

fix

For new projects or modernizing existing ones, use `import constant from 'lodash/constant';` or `import { constant } from 'lodash-es';` for ES module environments and improved tree-shaking.

affects: >=3.0.0 <4.0.0

gotchaThe `lodash.constant` standalone package (v3.0.0) is no longer actively maintained or receiving new features/security patches, unlike the main `lodash` library (v4.18.1 and above). Relying on this package may expose applications to unpatched vulnerabilities discovered in the broader Lodash ecosystem.

fix

Migrate to `lodash` or `lodash-es` and import `constant` directly (e.g., `import constant from 'lodash/constant';`) to ensure you benefit from ongoing maintenance and security updates.

affects: 3.0.0

gotchaUsing `lodash.constant` in a modern bundler might not provide optimal bundle size or tree-shaking benefits compared to importing directly from `lodash/constant` or using `lodash-es`. Older standalone modules like this one were designed for CJS environments before advanced tree-shaking was common.

fix

Switch to `import constant from 'lodash/constant';` (for Node.js/Webpack) or `import { constant } from 'lodash-es';` (for ES Modules and tree-shaking bundlers like Rollup/Webpack) to leverage modern optimization techniques.

affects: 3.0.0

Errors

Common errors & fixes

TypeError: require(...) is not a function

Attempting to immediately invoke the result of `require('lodash.constant')` as if it were the constant value itself, rather than the function that creates a constant value.

fix

The `require('lodash.constant')` call returns the `constant` *function*. You must first call this function with your desired value to get a new function that will always return that value. Correct usage: `const constantFn = require('lodash.constant'); const getValue = constantFn(42);`

Error: Cannot find module 'lodash.constant' or Module not found: Error: Can't resolve 'lodash.constant'

Attempting to use `require()` in an ES module environment without proper transpilation, or attempting named imports (`{ constant }`) where a default import is expected for this specific package.

fix

Ensure your environment is set up to handle CommonJS `require` calls, or use `import constant from 'lodash.constant';` if in an ES module context. For modern Lodash usage, consider `import constant from 'lodash/constant';` from the main `lodash` package.

ReferenceError: _ is not defined

This specific `lodash.constant` package only provides the `constant` function, not the full `_` object or any other Lodash utilities.

fix

To access the full Lodash utility belt, you need to install and import the main `lodash` package (e.g., `const _ = require('lodash');` or `import _ from 'lodash';`). `lodash.constant` is a single-function module.

Upgrade

Version history

3.0.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/lodash/lodash ↗

packagehttps://www.npmjs.com/package/lodash.constant ↗

homepagehttps://lodash.com/ ↗