CODEWITHSUNDEEP
node.jsaws-lambdaserverless-framework
user1592380
user1592380

Reputation: 36317

Context and module.exports in serverless framework functions

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I'm getting started with nodejs and the serverless framwork. in some of the examples i've seen and even used the following code (from https://www.serverless.com/framework/docs/providers/aws/guide/functions/):

// handler.js
module.exports.functionOne = function(event, context, callback) {};

2 questions:

1) does module.exports have anything to do with the common node method of making functions available to other nodules?

2)What is the context they are referring to here? based on http://ryanmorr.com/understanding-scope-and-context-in-javascript/

I see:

Every function invocation has both a scope and a context associated with it. Fundamentally, scope is function-based while context is object-based. In other words, scope pertains to the variable access of a function when it is invoked and is unique to each invocation. Context is always the value of the this keyword which is a reference to the object that “owns” the currently executing code.

Does this apply here?

Upvotes: 0

Views: 811

Answers (1)

Ville Rinne
Ville Rinne

Reputation: 821

The export is standard node.js, this is what maps your function implementation to the function declaration inside your serverless.yml

The context object is the AWS Lambda context (https://docs.aws.amazon.com/lambda/latest/dg/nodejs-context.html). If you look closely the example you linked is for AWS, the signature for the handler will be different for other cloud platforms.

Upvotes: 1

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