The way I see it, syntax sugar can be part of the language proper. For instance classes in JS are sugar syntax to define a function that defines fields in this

The way I see it, syntax sugar can be part of the language proper. For instance classes in JS are sugar syntax to define a function that defines fields in this and prototype members of this function. Arrow functions are sugar syntax to define functions bound to a specific this. async / await is sugar syntax for promises. for..of is sugar syntax for iterating over an iterable.