produce()

Immer-compatible API for direct mutation syntax.

Signature

function produce<T>(base: T, recipe: (draft: T) => void): T

Overview

produce() provides an Immer-compatible API where you mutate a draft object directly:

import { produce } from '@sylphx/pura'

const next = produce(state, draft => {
  draft.items[0] = 999        // Direct mutation
  draft.user.name = 'Jane'    // Just like Immer
})

When to use:

• Migrating from Immer (drop-in replacement)
• Prefer mutation syntax over helper methods
• Complex nested logic easier with direct access

Performance: 1.06-105× faster than Immer

For maximum performance, use produceFast() instead (helper-based API).

Complete Documentation

See produce() API Guide for comprehensive documentation including:

• Arrays (push, pop, splice, etc.)
• Objects (shallow, deep, add/delete properties)
• Maps and Sets
• Advanced patterns
• Type safety
• Performance tips
• Common patterns (Redux, React, Zustand)