amplify-typescript

This plugin allows to build lambda functions written in Typescript using the amplify-cli.

It iterates over the functions directory and builds functions which contains the tsconfig.json file in their src directory`.

$ npm install -g amplify-typescript

Lambda code structure

AWS Amplify creates directory for each lambda function in Amplify/backend/functions/{function_name}. Each directory has two subdirectories: src for the javascript code and dist for zipped package. Therefore it is not possible to use the dist directory for the generated js code. Instead we'll create subdirectory in src with the source code while the generated code will be generated in src.

• Create new directory /amplify/backend/function/{function_name}/src/**ts**.
• Move the .js/.ts files to the new directory.
• In the src directory, create the tsconfig.json file.

For example:

{
    "compilerOptions": {
        "target": "es2017", 
        "noImplicitAny": false,
        "outDir": ".",
        "allowJs": true,
        "types": ["node"],
    },
    "include": [
        "ts/**/*"
    ],
    "exclude": [
        "node_modules",
        "**/*.spec.ts"
    ]
}

Build the typescript code: amplify typescript build

Package and upload the function: amplify push

Enjoy :)