The Cost Of JavaScript In 2018

By Addy Osmany on 01/08/2018

Javascript is the most expensive part of your site.

📙Action Items 📙

💡 Apply code splitting and tree shaking.
💡 Pulling JS into a Web Worker or caching via a Service Worker helps a lot

📖Mobile is a spectrum

"stop taking fast networks and fast devices for granted"

When variance can kill the user experience, developing with a slow baseline.
💡 Minify your code
💡 Compress
💡 Ship less JS

📖Audit JS regularly

Libs optimizations from google
Lighthouse
💡Use the codecoverage tool from chrome dev tools.
💡lighthoust-ci