Pass an argument to an npm run script comprising multiple commands

Question

I'd like to pass an argument into the first of two commands in my npm script:

"scripts": {
  "myscript": "a && b"
}

When I run npm run myscript -- --somearg=somevalue, the argument is passed to command b but not command a. Is there some way to instead ensure that the first command receives the argument?

Answer 1

"scripts": {
  "myscript": "a",
  "postmyscript": "b"
}

Answer 2

I found the following solution after searching a lot from this discussion:

https://github.com/npm/npm/issues/9627#issuecomment-152607809

and

https://github.com/npm/npm/issues/9627#issuecomment-178576802

Solution 1. So in your package json add a config object like so

{
  "name": "packageName",
  "config" : { "variable1" : "value1" }
}

then you can access the variable like so on windows

    {
      "name": "packageName",
      "config" : { "variable1" : "value1" },
      "scripts": {
              "myscript": "a -c %npm_package_config_variable1%  && b -c %npm_package_config_variable1%"
      }
    }

in mac/linux I am assuming (not a 100%)

{
  "name": "packageName",
  "config" : { "variable1" : "value1" },
  "scripts": {
          "myscript": "a -c $npm_package_config_variable1  && b -c $npm_package_config_variable1"
  }
}

then you can override the variable by calling the script like so:

npm run myscript --packageName:variable1=value2

Solution 2.

no need for the config entry in the package.json

{
  "name": "packageName",
  "scripts": {
          "myscript": "a -c %npm_config_variable1%  && b -c %npm_config_variable1%"
  }
}

and call it like so

npm run myscript --variable1=value2

reason to pick one over the other:

https://github.com/npm/npm/issues/9627#issuecomment-178813965