How to Use Layers with Lambda Functions?

How to Use Layers with Lambda Functions?

In this video we look at how to use layers with AWS Lambda functions. (with nodejs). Learn How to use layers with Lambda functions.

In this video we look at how to use layers with AWS Lambda functions. (with nodejs)

We look at a demo app which uses two npm modules (axios and image-size) which were installed using npm and are part of the bundle. We then extract these modules into a layer. We attach this layer to our function and import and use the modules we extracted.

It has 2 advantages:

  • it reduces the size of the bundle
  • it makes it possible to re-use the extracted code across several functions.

We also look at how to separate local files and extract them into a layer and then import them from the function.

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