What are data and attributes for in pug?

Question

Pug

Good afternoon!
How to work with this mixin entry

mixin header-top-line(data)
  .header-top-line&attributes(attributes)

Answer 1

A mixin is like a function in JS. data in this example is the first parameter of the function. Esgo can be called whatever you like. But *&attribute expects an object like in JS to make block attributes out of it.
https://pugjs.org/language/attributes.html#attributes
https://pugjs.org/language/mixins.html