If the 2nd argument of String.prototype.replace is a string replacement patterns can create hard to find bugs
Topic: JavaScript โ Page 15
The omission of the error argument in try/catch JavaScript expressions is now supported in mayor browsers.
When serializing objects a toJSON method can be used to change the output of JSON.stringify
A presentation demoing the same React code running in the browser, a service worker and a Cloudflare serverless function.