SyntaxError in Step Functions Tutorial

Question

Hi there,

I'm doing this tutorial: https://docs.aws.amazon.com/step-functions/latest/dg/tutorial-get-started-create-first-sm.html

**There I need to create a Lambda Function in Node.js 16.x, this code has been provided:**

export const handler = async function(event, context) {

const credLimit = Math.floor(Math.random() * 10000);
    return (credLimit);
    
};

**When I test the code I get the following result though:**

{
  "errorType": "Runtime.UserCodeSyntaxError",
  "errorMessage": "SyntaxError: Unexpected token 'export'",
  "trace": [
    "Runtime.UserCodeSyntaxError: SyntaxError: Unexpected token 'export'",
    "    at _loadUserApp (file:///var/runtime/index.mjs:993:17)",
    "    at async Object.UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1031:21)",
    "    at async start (file:///var/runtime/index.mjs:1194:23)",
    "    at async file:///var/runtime/index.mjs:1200:1"
  ]
}

This is the first function in the state machine this tutorial is about. This error appears also when I execture the state machine of course.

I am quite a newbie and don't know how to proceed...can someone help me please?

Thanks in advance!

Best
Moe

Answer

Thanks Mike,

regarding 1): Yes, thats correct
regarding 2): It has indeed been a .js file (this is the default index after selecting 16.x though...)

I've changed the name to index.mjs but the test still throws an error:

![Screenshot:](/media/postImages/original/IMSltCaXD6TAKE6HGEid7t3A)

Answer

Please check the following:
1. Your node,js version is 16.x
2. Your index file has an extension of mjs as you are using ES module syntax - https://docs.aws.amazon.com/lambda/latest/dg/nodejs-handler.html

SyntaxError in Step Functions Tutorial

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