If we're considering Javascript as a programming language ( back in the day, it was a scripting language) then yes - daily and usually side by side.
It can be a bit of a PITA - sometimes I'll forget to put the $ on a variable name in PHP or forget to use var in Javascript (as the most basic of examples) - just get used to it eventually.
Same as grammar in written languages; Their, They're and There - all about context and remembering which one to use when.