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JavaScript jQuery Basics (2014) Creating a Simple Lightbox Perform: Part 4

Why don't we use "const" or "let" in place of "var" in some of these projects? Specifically - the Lightbox project.

So, I broke off into the "Full Stack Javascript" from "Front Front Web Dev" track because I was having trouble understanding jQuery. After a few courses, I learned just enough to be dangerous. I'm noticing that throughout the challenges and lessons on the Web Dev track, we're using "var" everywhere-even when "const" would be preferable? Admittedly, I don't always completely read all teachers notes - so forgive me if this was answered in some incredibly obvious place.

(sidenote: I just went back to where I got lost in jQuery and everything makes so much more sense. That full stack javascript track is next. take. my. money.)

1 Answer

Steven Parker
Steven Parker
228,978 Points

Both "const" and "let" are relatively recent additions to JavaScript (since 2015), and many of the courses were either developed before then, or before the changes had been adopted widely enough in browsers in use to make using the new syntax for public website projects a good idea.

You can substitute "const" or "let" for "var" in other projects as long as you're mindful of the differences in scope and how they may pertain to the situation. But for the most part, it won't be pertinent to the concepts being taught.