A guide to batch-migrating npm packages from one npm registry to another.

I recently took over the frontend team’s service stability governance and encountered some very distinctive production issues. Here I’ll document one particularly “interesting” bug hunt.

How to properly investigate when you encounter mysterious browser freezes.

A presentation for our partner department’s client-side engineers on how to compile and build modern JS applications!

A history of React state logic reuse!

Our team recently migrated two projects to degg 2.0, and both exhibited serious memory leak issues. Here I’ll use the tracking service I maintain as an example for debugging. After going live, memory growth looked like the chart below—the red box marks the degg 2.0 production runtime window. Within just 36 hours, memory had grown to 50%, while it normally stabilized at 20%-30%, clearly indicating a memory leak.

Life without a mock service is unbearable.

Testing your Node.js applications with Jest

Who would have thought that Promise is also a part of functional programming?

Refactoring the company’s legacy JSP project by introducing a Node.js layer.