aws-cdk.aws-lambda-nodejs 1.31.0

CDK Constructs for AWS Lambda in Node.js

Amazon Lambda Node.js Library

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This is a developer preview (public beta) module.

All classes with the Cfn prefix in this module (CFN Resources) are auto-generated from CloudFormation. They are stable and safe to use.

However, all other classes, i.e., higher level constructs, are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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This library provides constructs for Node.js Lambda functions.

To use this module, you will need to add a dependency on parcel-bundler in your package.json:

yarn add parcel-bundler@^1
# or
npm install parcel-bundler@^1

Node.js Function

Define a NodejsFunction:

# Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
lambda.NodejsFunction(self, "my-handler")

By default, the construct will use the name of the defining file and the construct's id to look up the entry file:

.
├── stack.ts # defines a 'NodejsFunction' with 'my-handler' as id
├── stack.my-handler.ts # exports a function named 'handler'

This file is used as "entry" for Parcel. This means that your code is automatically transpiled and bundled whether it's written in JavaScript or TypeScript.

Alternatively, an entry file and handler can be specified:

# Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
lambda.NodejsFunction(self, "MyFunction",
    entry="/path/to/my/file.ts",
    handler="myExportedFunc"
)

All other properties of lambda.Function are supported, see also the AWS Lambda construct library.

Configuring Parcel

The NodejsFunction construct exposes some Parcel options via properties: minify, sourceMaps, buildDir and cacheDir.

Parcel transpiles your code (every internal module) with @babel/preset-env and uses the runtime version of your Lambda function as target.

Configuring Babel with Parcel is possible via a .babelrc or a babel config in package.json.