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Run JavaScript Script Before Another Script

Automatically run scripts with NPM/Yarn before or after 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.

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