Using Colon

[itsabgr]

Using ?= a bit confusing.
The := operator, like in Go, is a better option.

[arthurfiorette]

Hmm, that's also a good idea.

But i think this proposal is leaning towards a "operator" like void or throw than a assignment operator that could only be used within code blocks.

[itsabgr]

What about something like

const [error, response] = try {
 return await fetch("https://arthur.place")
}

or

const [error, response] = try await fetch("https://arthur.place")

?