Syntax for an async arrow function

I can mark a JavaScript function as "async" (i.e., returning a promise) with the async keyword. Like this:

async function foo() {
  // Do something
}

What is the equivalent syntax for arrow functions?

Async arrow functions look like this:
const foo = async () => {
// do something
}


Async arrow functions look like this for a single argument passed to it:
const foo = async evt => {
// do something with evt
}


Async arrow functions look like this for multiple arguments passed to it:
const foo = async (evt, callback) => {
// do something with evt
// return response with callback
}


The anonymous form works as well:
const foo = async function() {
// do something
}


An async function declaration looks like this:
async function foo() {
// do something
}


Using async function in a callback:
const foo = event.onCall(async () => {
// do something
})


Using async method inside of a class:
async foo() {
// do something
}


Stack Overflow Q#42964102, score: 1636