When calling a function, you know what arguments/parameters to use, right!? Then you also know if it's sync or async. The browsers way of dealing with async see

When calling a function, you know what arguments/parameters to use, right!? Then you also know if it's sync or async. The browsers way of dealing with async seems to be forgotten, for example: button.onclick = buttonClicked; I find this pattern easier to deal with then callbacks.