The Ultimate Guide to TypeScript Monorepos

1

Webpack

Similar to Jest, it is very easy to use Webpack in a monorepo configured to use TypeScript project references. We can simply use the ts-loader loader, and everything should work automatically.

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2

React

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3

Prettier

Prettier is a great tool for maintaining consistent formatting in a project. Prettier works quite well for a monorepo. One can simply define a .prettierrc file in the root of the monorepo and run Prettier using that configuration file. It will automatically apply to all packages in the monorepo.

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4

Next.js

Next.js is a very powerful framework for React development and it is not too difficult to make this framework work in a TypeScript monorepo. Again, thanks to Next.js native support for both Yarn 2 workspaces and TypeScript project references there is not much we need to configure in this monorepo. We can simply define a tsconfig.json that references all local dependencies and Next.js will pick that up automatically.

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5

ExpressJS

There are many ways to develop, deploy and test Node.js lambda functions. In my reference template, I provide an example that uses an Express.js server. That is not necessarily the optimal way to deploy lambdas, chiefly because this results in deploying one lambda function that handles multiple routes. The most ‘serverless’ way to deploy a backend using functions would be to use different functions for different endpoints.

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6

ESLint

ESLint provides sophisticated analysis of JavaScript or TypeScript sourcecode. Thankfully it can be configured as easy as Prettier for a monorepo. We can define an .eslintrc.json file in the project root and that will apply to all files in the Monorepo.

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7

AWS ElasticWolf Client Console

Given this, I implemented a collection of lightweight scripts that allow standing up infrastructure in AWS using Terraform and perform deployments using the AWS CLI or SDK. For instance for deploying a lambda function, one can simply define a number of Terraform files (e.g. See lambda.tf).

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8

AWS Lambda

AWS Lambda for backend development.

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