Run JavaScript Script Before Another Script

If you want to run a script before another one completes, you can do this by prepending pre to the script name. NPM (or Yarn) will automatically run the script.

Suppose I have a script called test that runs my test suite. But before I do that, I want to make sure a script called build runs first. I could have a configuration like this:

pacakge.json

{
  "scripts": {
    "build": "...",
    "pretest": "build",
    "test": "..."
  }
}

Now when I run this command:

npm run test

The pretest script will automatically be run first, and in the example above, that means the build script automatically runs before the test script.

Note: Use post as the prefix to run a script after another script.