This teacher is Bob Ziroll, Head of Education at Scrimba

This website is related to the FrontendMasters workshop on JavaScript Patterns, which is split up into four parts

a screencast about test-driven development in JavaScript 

Don't use window.event

Today we’re excited to announce our support and collaboration on a new Stage 0 proposal to bring optional and erasable type syntax to JavaScript. Because this new syntax wouldn’t change how surrounding code runs, it would effectively act as comments. We think this has the potential to make TypeScript easier and faster to use for development at every scale. We’d like to talk about why we’re pursuing this, and how this proposal works at a high level.

Detect Dark Mode Preference with JavaScript 

The State of JS 2021 

Jint is a Javascript interpreter for .NET which can run on any modern .NET platform as it supports .NET Standard 2.0 and .NET 4.6.1 targets (and up). Because Jint neither generates any .NET bytecode nor uses the DLR it runs relatively small scripts really fast.