The author mentions he uses grunt for ui build/optimization without caveating that it hasn't seen a release in over a year: https://github.com/gruntjs/grunt/releases.
The project team has gone radio silent and even the mainline "contrib" plugins have unanswered issues and pull requests.
TL;DR If you are starting a new project, don't use grunt.
Kinda. I use jQuery when it makes sense, and when I'm working on someone else's dime and time. Use vanilla JS for stuff like this, because why lose an opportunity to learn?
The project team has gone radio silent and even the mainline "contrib" plugins have unanswered issues and pull requests.
TL;DR If you are starting a new project, don't use grunt.