Where is the context parameter in the current Node.js AWS Lambda function template?

Question

I was looking at a tutorial on writing a Lambda function in AWS using Node.js version 8. The template code shown in the tutorial when a new function is created looks like

exports.handler = async (event, context) => {
    //
};

but when I create one in my console using Node.js 14.x runtime, there is no context parameter.

Will the anonymous function accept a context parameter? What is the significance of it not being included in the later version of Node.js?

The second parameter always is the context.

hoangdv
– hoangdv

2021-06-19 02:37:52 +00:00
Commented Jun 19, 2021 at 2:37 — hoangdv
– hoangdv, Commented Jun 19, 2021 at 2:37

Jens · Accepted Answer · 2021-06-19 10:05:00Z

1

The context parameter can be omitted. But if you need it, it has to be the second parameter.

So both of these are fine:

exports.handler = async (event, context) => {};

and without context:

exports.handler = async (event) => {};

You can read more about NodeJS handlers and context in the official AWS documentation:

answered Jun 19, 2021 at 10:05

Jens

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