(I didn’t downvote you but) you answered the wrong parsing of OP’s original question: It wasn’t “why can’t we use JS elsewhere?” but rather “Why can’t we use ot

(I didn’t downvote you but) you answered the wrong parsing of OP’s original question: It wasn’t “why can’t we use JS elsewhere?” but rather “Why can’t we use other languages in the browser,” a semi-tired plea from those who haven’t learned to love JavaScript and/or don’t realize that due to the countless number of browsers out there, JavaScript is going to be the only option for DOM scripting for years, at minimum.