PuraPure FP for TypeScript

import { produce } from '@sylphx/pura'

// Returns real Array - use it anywhere!
const state = [1, 2, 3]
const next = produce(state, draft => {
  draft.push(4)
  draft[0] = 999
})

// next is a real Array
next[0]              // ✅ works - it's a real Array
next instanceof Array // ✅ true
await api.send(next)  // ✅ works with any library

// Objects - returns real Object
const user = { name: 'John', age: 30 }
const updated = produce(user, draft => {
  draft.age = 31
})

// Maps & Sets - returns real Map/Set
const map = new Map([['a', 1]])
const newMap = produce(map, draft => {
  draft.set('b', 2)
})
newMap.get('b')      // ✅ works - it's a real Map