Understanding and Optimizing Vue 3 Reactivity: Ref, Computed, and Reactive

Mastering Vue 3’s Powerful Reactivity System for Cleaner, More Efficient Code

Introduction

Vue 3 introduced a powerful new reactivity system with ref, computed, and reactive. While these tools offer great flexibility, they can sometimes lead to cluttered code, especially in complex components. This article dives deep into the design principles behind these reactivity primitives, explores their use cases, and offers strategies for optimization. 🚀

Understanding the Core Concepts 🧠

Ref 📌

ref is the most basic reactive reference in Vue 3. It wraps both primitive values and objects in a reactive container.

const count = ref(0)
console.log(count.value) // 0

Key points:

• Access the value using .value in script sections
• Automatically unwrapped in templates
• Can wrap both primitives and objects

Computed 🧮

computed creates derived reactive state based on other reactive sources.

const count = ref(0)
const doubleCount = computed(() =>…