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You can skip. I get that front end stuff can be intimidating. My recommendation is to learn the basics and when it comes to libraries fight the intimidation and take a few minutes to try out new technology when you encounter it. If you find it too hard in those few minutes of actually trying it, don't use it. You can still use script tags if you want. Your site will run just fine. Do what feels comfortable. These too…
I practically live and die by the 5 Minute Rule, and as a counterpoint, I've always found Grunt intuitive, if verbose. In particular, I love that its files API is so flexible. I frequently find myself asking questions that look like "I wonder if I can do this X way", and things just work. Saying Grunt is "very bad" is harsh and only serves to amplify hyperbole that causes much of the churn around JS tooling. [edited…
I'm speaking from personal experience and time lost trying to just get things to work so I can focus on building the application, not making a hobby out of building the frontend tooling. What I said may be harsh, but it's the truth. Have you tried gulp?