Unexpected token function

[JT]

I use typescript +koa2 +koa-static

environment

• node 6.10.2
• koa 2.3.0
• koa-static 4.0.1
• typescript 2.5.3

code

import serve = require("koa-static");
export const app = new Koa();
app.use(serve(__dirname + '/templates'));

error:

E:\frondend\koa-websocket\node_modules\koa-static\index.js:39
    return async function serve (ctx, next) {
                 ^^^^^^^^
SyntaxError: Unexpected token function
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (E:\frondend\koa-websocket\src\app.ts:5:1)

so,how to solve?

[Xin Hao]

async function needs node@7.6+ :)

[Xin Hao]

since you are using ts, you can translate async to generator :)

[JT]

@coderhaoxin thank you.but, i have anthor question that koa-router use async funcrtion too,koa-router is normal.why?

[Xin Hao]

@wjtgithub koa-router supports async function, but doesn't using async function in their code :)

[Anthony Rosequist]

@coderhaoxin Sorry, I don't understand what you mean in this comment. The error occurs in the already-compiled koa-static/index.js file, not the user's TS code.