Node.js 20 support

[OscarSaharoy]

Hi, thanks so much for this project :) I have just set this up in node 20 and got it working with these changes so I thought people might find it useful. I can make changes + additions if it would be helpful but just putting this PR in for reference!

[jchan172]

This doesn't work. I tried this in Lambda and got this:

2024-04-05T06:10:36.182Z    undefined   ERROR   Uncaught Exception  
{
    "errorType": "Runtime.UserCodeSyntaxError",
    "errorMessage": "SyntaxError: Cannot use import statement outside a module",
    "stack": [
        "Runtime.UserCodeSyntaxError: SyntaxError: Cannot use import statement outside a module",
        "    at _loadUserApp (file:///var/runtime/index.mjs:1084:17)",
        "    at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1119:21)",
        "    at async start (file:///var/runtime/index.mjs:1282:23)",
        "    at async file:///var/runtime/index.mjs:1288:1"
    ]
}

[OscarSaharoy]

This doesn't work. I tried this in Lambda and got this:

2024-04-05T06:10:36.182Z  undefined   ERROR   Uncaught Exception  
{
    "errorType": "Runtime.UserCodeSyntaxError",
    "errorMessage": "SyntaxError: Cannot use import statement outside a module",
    "stack": [
        "Runtime.UserCodeSyntaxError: SyntaxError: Cannot use import statement outside a module",
        "    at _loadUserApp (file:///var/runtime/index.mjs:1084:17)",
        "    at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1119:21)",
        "    at async start (file:///var/runtime/index.mjs:1282:23)",
        "    at async file:///var/runtime/index.mjs:1288:1"
    ]
}

Ah thanks for giving it a go anyway, I think its working for me though, I made a new node.js version 20.x Lambda function and copied the code from the index.js file in this branch into index.mjs in the lambda code editor. And when I clicked save and then deploy and test it seemed to work, and I didnt get that error?

[Aldekein]

I just tried this code with Node 20: it works great! I created one index.mjs file in the root of new Lambda for the code.

[Andrey-Svetlichny]

This works with Node v20 in AWS Lambda. For people who get an error:

"SyntaxError: Cannot use import statement outside a module",

File must have .mjs extension, not .js