I am new to web development. I have familiarity with CSS/HTML/Wordpress and Expression Engine Content Management system. I want to be a well rounded professional web developer desperately, and trust me, it's been a struggle to do all I do and still have time for self-development with other languages. I take care of several Wordpress Sites at my job and am currently learning Expression Engine 3.0 for a new, much large Expression Engine site. I love the Javascript language, but I am concerned if learning it right now would be good given my current type of work. I was told that learning Javascript would be helpful for customizing things in Expression Engine as well.
That said, here is my question....is learning JS beneficial for Wordpress Dev or/and Expression Engine development? Please forgive me if this is a stupid question. Eventually I would like to design my own EE add-ons and Wordpress themes/plugins with the ability to customize them as needed for my client, maybe even make web games? Is learning JS a good skill for my current career direction? I'm also trying to learn BootStrap as well to my language learning TODO list.