https://developer.mozilla.org/en-US/ and https://docs.microsoft.com/en-us/scripting/javascript/refere... are up-to-date. Don't go to the old w3w-schools.org regardless how good their SEO ranking on Google is.

For packaging the industry is slowly moving from grunt and gulp to webpack. https://webpack.js.org/ And react/angularjs as frameworks of course.

http://javascriptweekly.com/ has decent newsletters (bottom of the page). There's little overlap between the Javascript and nodejs one.