Lambda Node18 type module, extension .mjs, results in ES error loading module

Question

So, my package.json has type:module and the handler file extension is .mjs, so why am I getting this error?

ERROR	(node:8) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.

followed by this one:

2023-06-27T13:49:12.742Z	undefined	ERROR	Uncaught Exception 	{
    "errorType": "Runtime.UserCodeSyntaxError",
    "errorMessage": "SyntaxError: Unexpected token 'export'",
    "stack": [
        "Runtime.UserCodeSyntaxError: SyntaxError: Unexpected token 'export'",
        "    at _loadUserApp (file:///var/runtime/index.mjs:994:17)",
        "    at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1032:21)",
        "    at async start (file:///var/runtime/index.mjs:1195:23)",
        "    at async file:///var/runtime/index.mjs:1201:1"
    ]
}

Accepted Answer

It turned out that my serverless.yml deployment file was excluding the package.json file. Resolved.

Answer

Hi Rick,

Please take a look at this [re:Post](https://repost.aws/questions/QUEcvqsCYHT7CP6gEyzsPd7g/aws-lambda-es6-module-error-module-is-not-defined-in-es-module-scope) and see if it helps.

Lambda Node18 type module, extension .mjs, results in ES error loading module

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