Tag: immutability

JavaScript Reducers: What They Are and Why Use Them

August 30, 2025

Light abstract background with faded JavaScript code, several green monopoly-style houses and one red hotel, and the title “JavaScript Reducers — What Are They and Why Use Them.”

Reducers take many things and fold them into one. From Array.prototype.reduce() to app-level state, here’s the simple mental model—with copy-paste code.