Web Workers in Next.js 15 with Comlink

Thu, 17 Apr 2025 00:00:00 +0000

Running heavy computations or background tasks directly on the main thread can lead to a sluggish user interface 🐌. Web Workers offer a solution by allowing you to run scripts in background threads, keeping your UI responsive. However, communicating with Web Workers traditionally involves a lot of boilerplate code using postMessage and event listeners.

Comlink is a tiny library by the Google Chrome team that simplifies Web Worker communication, making it feel like you’re interacting with local objects or functions.

Comlink on Ye Joo Park's Blog

Web Workers in Next.js 15 with Comlink