pickpatch

pickpatch is a JavaScript library provides the easy way to update partial of immutable object. Inspired by Immer.

• Write updation by pure function and immutable values
• Type inference friendly (TypeScript Support)
• Surprise-less magical API

Usage

$ npm install --save pickpatch

import pickpatch from "pickpatch";

const obj = { a: { b: 1 }, c: 2, d: 3 };
const newObj = pickpatch(
  _ => [_.a.b, _.c], // picker defines partial to update
)(
  ([b, c]) => [b * 10, c + 5], // patcher defines new values
)(
  obj, // old object
);
// -> { a: { b: 10 }, c: 7, d: 3 }