嵌套异步/等待功能

Question

It's easier just to look at the code:

async function addFiles(dir,tree) {
  return (await readDir(dir))
    .map(name => {await readDir(dir); return name;}) // error here
}

This code returns an error on line 3, saying there's an unexpected token near readDir . I don't understand why this won't work.

Answer 1

It turns out, I forgot to declare my arrow function as async.

the revised code is

async function addFiles(dir,tree) {
  return (await readDir(dir))
    .map(async name => {await readDir(dir); return name;}) // error here
}