Work Schedules

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Typescript

Click for instructions

You can use Typescript in both your frontend React code (with react-scripts v2.1+) and your serverless functions (with netlify-lambda v1.1+). Follow these instructions:

1. yarn add -D typescript @types/node @types/react @types/react-dom @babel/preset-typescript @types/aws-lambda
2. convert src/lambda/hello.js to src/lambda/hello.ts
3. use types in your event handler:

import { Handler, Context, Callback, APIGatewayEvent } from 'aws-lambda'

interface HelloResponse {
  statusCode: number
  body: string
}

const handler: Handler = (event: APIGatewayEvent, context: Context, callback: Callback) => {
  const params = event.queryStringParameters
  const response: HelloResponse = {
    statusCode: 200,
    body: JSON.stringify({
      msg: `Hello world ${Math.floor(Math.random() * 10)}`,
      params,
    }),
  }

  callback(undefined, response)
}

export { handler }

rerun and see it work!

You are free to set up your tsconfig.json and tslint as you see fit.

If you want to try working in Typescript on the client and lambda side: There are a bunch of small setup details to get right. Check https://github.com/sw-yx/create-react-app-lambda-typescript for a working starter.

Routing and authentication with Netlify Identity

For a full demo of routing and authentication, check this branch: netlify/create-react-app-lambda#18 This example will not be maintained but may be helpful.

Service Worker

create-react-app's default service worker (in src/index.js) does not work with lambda functions out of the box. It prevents calling the function and returns the app itself instead (Read more). To solve this you have to eject and enhance the service worker configuration in the webpack config. Whitelist the path of your lambda function and you are good to go.