Registry / serialization / pure-conditions

pure-conditions

library1.2.3jsnpmunverified

pure-conditions is a JavaScript utility library providing a collection of pure, isolated functions designed to simplify common conditional logic. It offers methods for tasks like checking for duplicates in arrays, determining if an object or array is empty, validating email formats, and string manipulations such as checking if a string ends with a specific substring. The current stable version is 1.2.3. As a small, focused utility, it doesn't adhere to a strict release cadence but updates as new common conditions are identified or minor improvements are made. Its key differentiators include its adherence to pure function principles (no side effects, predictable output) and the complete isolation of functions, which benefits bundlers and compilers by allowing for efficient tree-shaking and minimal bundle sizes. It focuses on functional programming paradigms for robustness and testability.

serialization

npm install pure-conditions

github ↗package ↗

INSTALL

IMPORT

SIG · PURE-CONDITIONS

pure-conditions

serializationjavascriptv1.2.3

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.

hasDuplicates

✓ import { hasDuplicates } from 'pure-conditions';

✗ const { hasDuplicates } = require('pure-conditions');

CommonJS `require` is shown in the README, but ESM `import` is preferred for modern Node.js and browser environments.

isEmpty

✓ import { isEmpty } from 'pure-conditions';

✗ import isEmpty from 'pure-conditions'; // Incorrect default import

All functions are named exports; there is no default export. Destructuring is required.

isEmail

✓ import { isEmail } from 'pure-conditions';

✗ require('pure-conditions').isEmail;

While functional, direct property access like `require('pkg').func` can sometimes lead to issues with bundlers or static analysis compared to explicit destructuring.

Demonstrates importing and using several utility functions like `hasDuplicates`, `isEmpty`, `endsWith`, and `isEmail` to perform common conditional checks.

import { hasDuplicates, isEmpty, endsWith, isEmail } from 'pure-conditions'; console.log('--- pure-conditions Quickstart ---'); // Check for duplicates in an array const listWithDuplicates = ['apple', 'banana', 'apple']; console.log(`Has duplicates (['apple', 'banana', 'apple']): ${hasDuplicates(listWithDuplicates)}`); // Check if an object is empty const emptyObject = {}; const filledObject = { id: 1 }; console.log(`Is {} empty? ${isEmpty(emptyObject)}`); console.log(`Is { id: 1 } empty? ${isEmpty(filledObject)}`); // Check if a string ends with another string const sentence = 'Hello, world!'; console.log(`'Hello, world!' ends with 'world!'? ${endsWith(sentence, 'world!')}`); console.log(`'Hello, world!' ends with 'universe'? ${endsWith(sentence, 'universe')}`); // Validate an email address const validEmail = 'test@example.com'; const invalidEmail = 'invalid-email'; console.log(`'test@example.com' is a valid email? ${isEmail(validEmail)}`); console.log(`'invalid-email' is a valid email? ${isEmail(invalidEmail)}`);

Debug

Known issues

gotchaThe library primarily uses named exports. Attempting to use a default import (e.g., `import PConditions from 'pure-conditions'`) will result in `undefined` or an error, as there is no default export.

fix

Always use named imports with destructuring: `import { functionName } from 'pure-conditions';`

affects: >=1.0.0

gotchaAs a 'pure' utility, functions are designed for immutable operations. While convenient, ensure you understand that these functions do not modify their inputs, but rather return a boolean or new value based on the condition.

fix

No fix needed, this is by design. Understand that functions like `hasDuplicates` do not change the array, they only evaluate it.

affects: >=1.0.0

gotchaOlder Node.js environments or build setups might require specific configuration for ESM `import` statements. The README's examples use CommonJS `require`, which is universally supported but less modern.

fix

For modern Node.js and bundlers, use ESM `import`. If targeting older environments, ensure your build setup transpiles ESM to CommonJS, or stick to `require()` if feasible for your module type.

affects: <14.0.0

Errors

Common errors & fixes

TypeError: Cannot read properties of undefined (reading 'hasDuplicates')

Attempting to call `hasDuplicates` on an `undefined` or incorrectly imported object, often due to a wrong import statement (e.g., default import or no destructuring).

fix

Ensure you are using named imports with destructuring: `import { hasDuplicates } from 'pure-conditions';` or `const { hasDuplicates } = require('pure-conditions');`

SyntaxError: Unexpected token '{'

Using `import { someFunction } from 'pure-conditions';` in a CommonJS module context (a file without `'type': 'module'` in `package.json` and `.js` extension, or a `.cjs` file).

fix

Either convert your file/project to an ESM module by setting `'type': 'module'` in `package.json` or rename the file to `.mjs`, or use CommonJS `require`: `const { someFunction } = require('pure-conditions');`

Upgrade

Version history

1.2.3latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/buxlabs/pure-conditions ↗

packagehttps://www.npmjs.com/package/pure-conditions ↗