How to pass and reuse parameters in multiple npm scripts?

Other Questions NPM
1

Hey folks, I’m trying to figure out how to run multiple scripts with a single parameter. Here’s what I want to do:

I’ve got an all script that runs two other scripts, code1 and code2. I want to pass one parameter to all and have both code1 and code2 use that same parameter. Something like this:

{
  "scripts": {
    "all": "npm run firstScript -- $PARAM && npm run secondScript -- $PARAM"
  }
}

So when I run npm run all -- myValue, it should basically do:

  1. npm run firstScript -- myValue
  2. npm run secondScript -- myValue

Is there a way to set this up in the package.json? I’ve tried a few things but can’t get it working. Any help would be awesome!

2

I’ve encountered this issue before, and there’s a neat solution using cross-env that works across different operating systems. Here’s what you can do:

First, install cross-env as a dev dependency:

npm install --save-dev cross-env

Then, modify your package.json scripts like this:

“scripts”: {
“all”: “cross-env PARAM=$npm_config_param npm run firstScript && cross-env PARAM=$npm_config_param npm run secondScript”,
“firstScript”: “echo First script with param $PARAM”,
“secondScript”: “echo Second script with param $PARAM”
}

Now you can run npm run all --param=myValue and both scripts will receive the parameter. This approach is more robust and works consistently across Windows, macOS, and Linux.

3

While the previous solutions are valid, I’d like to suggest another approach using npm-run-all. This package simplifies running multiple npm scripts sequentially or in parallel.

First, install npm-run-all:

npm install --save-dev npm-run-all

Then, update your package.json:

{
“scripts”: {
“all”: “run-s "firstScript:" "secondScript:"”,
“firstScript:": “echo First script with param”,
"secondScript:”: “echo Second script with param”
}
}

Now you can run npm run all – myValue, and both scripts will receive the parameter. This method is clean, flexible, and works across different OS platforms without additional configuration.

4

hey SurfingWave, i’ve done smth similar before. try using $npm_config_param instead of $PARAM in ur scripts. like this:

“all”: “npm run firstScript --param=$npm_config_param && npm run secondScript --param=$npm_config_param”

then u can run it with npm run all --param=myValue. hope this helps!