Serverless Plugin Typescript

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Repo README Contents:


serverless npm version Build Status

Serverless plugin for zero-config Typescript support



yarn add --dev serverless-plugin-typescript

Add the following plugin to your serverless.yml:

  - serverless-plugin-typescript


See example folder for a minimal example.


The default tsconfig.json file used by the plugin looks like this:

  "compilerOptions": {
    "preserveConstEnums": true,
    "strictNullChecks": true,
    "sourceMap": true,
    "target": "es5",
    "outDir": ".build",
    "moduleResolution": "node",
    "lib": ["es2015"],
    "rootDir": "./"

Note 1: The outDir and rootDir options cannot be overwritten.

Note 2: Don’t confuse the tsconfig.json in this repository with the one mentioned above.

Including extra files

All files from package/include will be included in the final build file. See Exclude/Include


Google Cloud Functions

When using with Google Cloud Functions via the serverless-google-cloudfunctions plugin, you simply have to provide a main field in your package.json:

  // ...
  "main": "handler.js",
  // ..

And this plugin will automatically compile your typescript correctly. Note that the field must refer to the compiled file name, namely, ending with a .js extension.

If a main field was not found, then this plugin will use index.js. Before compilation begins, it will check to see that the file indicated exists with a .ts extension before actually trying to compile it.

Automatic compilation

The normal Serverless deploy procedure will automatically compile with Typescript:

Usage with serverless-offline

The plugin integrates very well with serverless-offline to simulate AWS Lambda and AWS API Gateway locally.

Add the plugins to your serverless.yml file and make sure that serverless-plugin-typescript precedes serverless-offline as the order is important:

    - serverless-plugin-typescript
    - serverless-offline

Run serverless offline or serverless offline start to start the Lambda/API simulation.

In comparison to serverless offline, the start command will fire an init and a end lifecycle hook which is needed for serverless-offline and e.g. serverless-dynamodb-local to switch off resources (see below)


Configure your service the same as mentioned above, but additionally add the serverless-dynamodb-local plugin as follows:

    - serverless-plugin-typescript
    - serverless-dynamodb-local
    - serverless-offline

Run serverless offline start.

Other useful options

You can reduce the clutter generated by serverless-offline with --dontPrintOutput and disable timeouts with --noTimeout.

Run a function locally

To run your compiled functions locally you can:

$ serverless invoke local --function <function-name>

Options are:

Enabling source-maps

You can easily enable support for source-maps (making stacktraces easier to read) by installing and using the following plugin:

yarn add --dev source-map-support
// inside of your function
import 'source-map-support/register'

If you are using webpack (most likely). Add devtool: 'source-map' to webpack.config.js:

module.exports = {
  .... snip ....
  devtool: 'source-map',
  .... snip ....


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