JavaScript code failing on AWS EC2 instance

Question

In my JavaScript program, I have:

const myFunction = async function (input) {
 // do stuff
}

It runs fine on Windows 10. But same code gives error on AWS EC2 instance:

const myFunction = async function (input) {

SyntaxError: Unexpected token function

at createScript (vm.js:56:10)

at Object.runInThisContext (vm.js:97:10)

What do I need to do here?

Answer 1

async support was added in nodejs v7.6

Given you're running nodejs v6.13.0 - that's why it fails

Solution: upgrade your nodejs on the target server or don't use async .

Answer 2

The keywords async/await were introduced in ES2017.

You may need to transpile your ES2017 code into a syntax that your EC2 Node version understands. If your EC2 is not running Node v7.6 or greater ( node -v ), then async/await will not work out of the box.

Transpile your js with Babel or upgrade node to the latest LTS on your EC2 instance.

Answer 3

Check for . babelrc It must be missing