AWS Lambda exports class works in node.js v6.4 but

Question

This question already has an answer here:

• Node.js support for => (arrow function) 4 answers

I have code works in node.js v6.4: just two files, index.js:

  // ------------ Index.js ------------ 
  'use strict';

  var Event = require('./models/event.js');

  exports.handler = (event, context, callback) => {
     console.log('done');
  }

and event.js:

  // ------------ Event.js ------------ 

  class Event {
    static get dynamoDBTableName() {
      return
    }
    get hashValue() {
      return
    }
    parseReference(reference) {
      return
    }
  }

  exports.Event = Event

when run index.handler on AWS Lambda which use version node.js 4.3, it throws a error:

  Syntax error in module 'index': SyntaxError
  at exports.runInThisContext (vm.js:53:16)
  at Module._compile (module.js:373:25)
  at Object.Module._extensions..js (module.js:416:10)
  at Module.load (module.js:343:32)
  at Function.Module._load (module.js:300:12)
  at Module.require (module.js:353:17)
  at require (internal/module.js:12:17)
  at Object.<anonymous> (/var/task/index.js:16:13)
  at Module._compile (module.js:409:26)
  at Object.Module._extensions..js (module.js:416:10)

I think it's something wrong with exports.Event = Event,

Is there some trick to fix this.

I'm new to node.js.

Any help should be appreciated.

I think it's not SyntaxError with (event, context, callback) => { }

Because AWS Lambda sample code runs well with this Syntax:

Answer 1

I originally thought the arrow function was the culprit. However, AWS Node.js 4.3.2 DOES support the arrow function, as mentioned in this post about Node.js 4.3.2 Runtime on Lambda.

---

NEW (correct) ANSWER

Does the event.js file start with 'use strict';?

You must use strict mode for a class declaration in node.js 4.3.2

Mozilla Developer Network about strict mode

Hoping this will help...

---

ORIGINAL (incorrect) ANSWER

module.exports = Products

I believe the arrow function:

() => {}

is not yet implemented in the nodejs version you are using (4.3).

See this answer

Arrow functions are supported in Node.js since version 4.4.5

---

If updating your nodejs version is not an option for you, you could replace:

  exports.handler = (event, context, callback) => {
    console.log('done');
  }

with

  exports.handler = (event, context, callback) = function() {
     console.log('done');
}