Is it possible to use npm to run scripts in multiple subfolders?

Question

I have a folder (a project) with 3 subfolders (client, server, assets). Each subfolder has a different command to start and to work on the project I need to start the 3 apps. This is the folder layout and the commands I use to start each subproject:

• project
  • client (ionic serve)
  • server (node index)
  • assets (http-server -p 8082)

Currently, I go to each of the three folders and start each of the apps. To make the process more standard, each subproject has a package.json with a start script, so I just cd subfolder && npm start.

My question: is it possible to use npm on the parent folder (i.e., write a package.json there) in such a way that I can just run the following command and have the same (or similar) effect?

project> npm start

I have tried using the package parallelshell, but it didnt work (probably because of the cd:

"scripts": {   "start": "parallelshell 'cd app && ionic serve' 'cd api && npm start' 'cd assets && npm start'", } 

Answer 1

it is really late to answer but you got built-in option --prefix, example:

-package.json -/dist/ssr/package.json 

# package.json in root npm run start --prefix dist/ssr 

Answer 2

You can use "concurrently" to accomplish this. So you would create a package.json which looks something like the following:

... "scripts": {   "client": "cd client && npm start",   "server": "cd server && npm start",   "assets": "cd assets && ionic serve",   "start": "concurrently \"npm run client\" \"npm run server\" \"npm run assets\" ", }, ... "devDependencies": {   "concurrently": "^1.0.0" } ... 

Note: This will start all three processes concurrently which means that you get mixed Output of all three (like topheman already mentioned)