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use-tosorted-instead-of-sort-for-immutability

Replace in-place array sort() with toSorted() for immutability in JavaScript.

Updated Feb 10, 2026
Search Tags:#typescript#react#javascript#sorting#immutability#array methods
One-click install
npx skills add https://github.com/ihj04982/my-cursor-settings --skill use-tosorted-instead-of-sort-for-immutability
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: use-tosorted-instead-of-sort-for-immutability
Source: https://github.com/ihj04982/my-cursor-settings/tree/main/skills/use-tosorted-instead-of-sort-for-immutability
Command: npx skills add https://github.com/ihj04982/my-cursor-settings --skill use-tosorted-instead-of-sort-for-immutability

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill addresses common bugs in JavaScript applications, particularly within React, that arise from mutating arrays in place using the .sort() method, which conflicts with immutability principles.

Core Features & Use Cases

  • Immutable Sorting: Provides a safe way to sort arrays without altering the original data structure.
  • React State Management: Prevents issues related to stale closures and broken immutability patterns in React components.
  • Use Case: When displaying a list of users in a React component, use this Skill to sort the users by name without directly modifying the users prop or state, ensuring predictable behavior.

Quick Start

Use the use-tosorted-instead-of-sort-for-immutability skill to sort the users array by name immutably.

Frequently Asked Questions about use-tosorted-instead-of-sort-for-immutability

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why does sorting an array in React cause state bugs?▼

Sorting an array in React causes bugs because the JavaScript sort method mutates the array in place, violating immutability principles and causing stale closures or unpredictable component behavior.

How do I sort an array immutably in JavaScript?▼

To sort an array immutably in JavaScript, use the toSorted method instead of sort to return a new sorted array without altering the original data structure.

What is the difference between sort and toSorted in JavaScript?▼

The difference between sort and toSorted is that sort mutates the original array in place, while toSorted returns a new sorted array, preserving the original data structure for safer state management.

Does toSorted work in older browsers or legacy JavaScript environments?▼

The toSorted method is designed for modern browser environments. For older browsers lacking support, you can use the spread operator to copy the array before sorting to achieve immutable sorting.

How do I prevent stale closures when sorting lists in React components?▼

To prevent stale closures when sorting lists in React, use immutable array sorting methods like toSorted to avoid mutating state props directly, ensuring predictable component rendering.

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