Liz discusses the latest experimental features in Node: worker threads, performance hooks, diagnostic reports, code loading policies, and ES modules.

“I am always looking for ways to build faster, slicker web pages. Where applicable, I’ll use great new browser features such as service workers, HTTP/2 and improved compression, just to name a few. But what if I told you there was a way to build even faster web pages? I’d like to introduce you to the Streams API.”

Phil introduces the new KV Storage API, built-in modules, and import maps.

Amusing as ever, Jake dives deep into the websites of Formula One racing teams and analyzes where they could be squeezing more performance from.

Just because you’re using TypeScript doesn’t mean you need to adhere to it zealously. Great advice from Vitaly.

Never heard of Unicode normalization? No worries, Alessandro explains why you might find it useful.

Server side rendering a React app can provide a few different benefits including performance and SEO. The problem is with those benefits comes a cost of additional complexity to your application. Tyler starts from scratch and slowly builds a server side rendered React app while breaking down some of the complexity as he goes along.

1. Don’t stop the data flow. Props and state can change, and components should handle those changes whenever they happen.
2. Always be ready to render. A component shouldn’t break because it’s rendered more or less often.
3. No component is a singleton. Even if a component is rendered just once, your design will improve if rendering twice doesn’t break it.
4. Keep the local state isolated. Think about which state is local to a particular UI representation — and don’t hoist that state higher than necessary.

• How do I replicate componentDidMount with useEffect?
• How do I correctly fetch data inside useEffect? What is []?
• Do I need to specify functions as effect dependencies or not?
• Why do I sometimes get an infinite refetching loop?
• Why do I sometimes get an old state or prop value inside my effect?

Concurrent React and the Scheduler allow us to implement scheduling of tasks in our applications which will allow us to create highly responsive user interfaces.