https://en.wikipedia.org/wiki/Syntactic_sugar
In computer science, syntactic sugar is syntax within a programming language that is designed to make things easier to read or to express. It makes the language “sweeter” for human use: things can be expressed more clearly, more concisely, or in an alternative style that some may prefer. Syntactic sugar is usually a shorthand for a common operation that could also be expressed in an alternate, more verbose, form.
such as:
for (let this of these){} is equivalent to for (let i = 0; i<these.length; i++){}.