WaitGroups are a means of synchronizing goroutines; yet the Add()/defer Done() idiom feels clumsy and is error-prone. A new method, Go(), puts an end to goroutine counting.

Tests that rely on time.Sleep() to test timings can be unreliable and slow. The synctest package introduces two antidotes: fake time and

The Go team decided to put an end to error handling syntax proposals. Time for a refresher on the kind of error handling that works well since 2009.

The sync/atomic package recommends using atomic types and their methods instead of the package-level atomic functions. For good reasons.

Compiling Go code into a WebAssembly module is easy as pie. Getting the code to interact with the browser requires a few lines of Javascript, but it's less complicated than you might think.