Chris Ferdinandi’s Daily Developer Tips
Without a doubt, the most valuable newsletter I’ve ever subscribed to! Featuring “code snippets, tools, techniques, and interesting stuff” (primarily on vanilla JavaScript), Chris’ daily newsletter educates and inspires, and unpacks code and decision making step-by-step.
You can (and should) subscribe at his website, https://gomakethings.com/.
In addition to an awesome newsletter, Chris also has many resources, including an online academy, for learning JavaScript.