Comments (1)
They are technically two different things. The first one is a function declaration -- the name sum
in this case has special properties -- you can put that function declaration anywhere in the file (even as the last written code) but still use it anywhere (even on the first line of the file)
The second example is a function expression -- sumOne
is not usable until AFTER sumOne
is declared. This is also similar to how any other const
or let
works.
Anything after a const
or a let
-- is impossible for us to know what it is.
Take this crazy contrived example:
const sumOne = (() => {
if (someValue) {
return () => {};
}
return 2;
})()
sumOne
could be either the number 2 or a function, which could be determined at runtime.
In other words, it's pretty out of scope for use to do any sort of highlighting that would require a language server to parse the file and figure out types for us.
from vim-javascript.
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