How to Fix Vue SSR Composables

The Problem

In this quick-fix, you will learn ensuring composables work in SSR. This matters because SSR-safe composables prevent hydration errors. In real-world applications, this pattern appears in server-side rendered applications.

The Wrong Way

const width = ref(window.innerWidth); // SSR crash

Incorrect implementation

The Right Way

const width = process.client ? ref(window.innerWidth) : ref(0);

Correct implementation with Composition API

Prevention

• Always use the official API
• Follow Vue best practices
• Test your implementation
• Document your patterns

FAQ

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