nejQuery is a lightweight, functional JavaScript utility library — inspired by Ramda, Lodash, and FP principles — with a focus on data-last, curried, and composable functions. It offers a rich set of helpers for arrays, strings, numbers, objects, predicates, ADTs, and more.
It's like Ramda with fewer gotchas, Lodash with less weight, and jQuery with... well, no jQuery.
Honestly? You should. They're battle-tested, community-loved, and full-featured.
But if you've ever screamed "why is this curried nonsense so weird" or thought Lodash was a bit... much — welcome to nejQuery, the utility library your inner minimalist didn’t know it needed.
- Data-last, curried function signatures
- Immutable and side-effect-aware utilities
- Composable with
pipe()andcompose() - Includes support for custom ADTs like
MaybeandResult - Written in plain JavaScript (no build step required)
npm install nejqueryOr add manually:
<script src="path/to/nejquery.js"></script>Instead of writing imperative code like this:
const nums = [1, 2, 3, 4];
const result = [];
for (let i = 0; i < nums.length; i++) {
const x = nums[i];
if (x % 2 === 1) {
result.push(x + 1);
}
}
console.log(result); // [2, 4]...you can write code declaratively like this:
import { pipe, map, filter, add } from 'nejquery'
const nums = [1, 2, 3, 4]
const isOdd = x => x % 2 === 1
// Partially applied functions
const add1 = add(1)
const filterIsOdd = filter(isOdd)
const mapIncrement = map(add1)
// Using Pipe for function composition
const incrementOdds = pipe(filterIsOdd, mapIncrement)
console.log(incrementOdds(nums)) // => [2, 4]nejQuery is organized into the following sections:
- Array functions
- Number functions
- String functions
- Objects
- Utils
- Debugging functions
- Predicates
- Helpers
Full documentation is available in nejquery_docs.md
Use createADT to build expressive data structures:
const Vehicle = createADT({
Car: ['make', 'model'],
Bicycle: ['type'],
Truck: ['make', 'payloadCapacity']
})
const myVehicle = Vehicle.Car('Toyota', 'Camry')
match(myVehicle, {
Car: ({make, model}) => console.log(`Car: ${make} ${model}`),
Bicycle: ({type}) => console.log(`Bicycle: ${type}`),
Truck: ({make, payloadCapacity}) => console.log(`Truck: ${make}, Payload: ${payloadCapacity}kg`)
})Includes built-in ADTs: Maybe, Result and matching helpers.
All functions are documented with descriptions, examples, and implementations in nejquery_docs.md
- Keep functions small and pure
- Prioritize readability and composability
- Never mutate inputs
- Empower functional programming in everyday JavaScript
Got a function to propose? Open a PR or an issue — contributions are welcome!
Disclaimer: nejQuery is not affiliated with or endorsed by the jQuery Foundation or OpenJS Foundation.
Plus, I have great respect for jQuery. My grandfather used to use it.
MIT