nx/docs/shared/recipes/tips-n-tricks/wait-for-tasks.md

Wait for Tasks to Finish

If you want to ensure that a set up task has been run before you run a particular task, you want to use the dependsOn property.

For instance, if you have a React app called store and a database project called db, you may want to run nx clean db before you run nx e2e store.

To set that up, you would edit the store app's project.json file:

{% tabs %} {% tab label="Version 16+" %}

{
  "targets": {
    "e2e": {
      "dependsOn": [
        {
          "projects": ["db"],
          "target": "clean"
        }
      ]
    }
  }
}

{% /tab %} {% tab label="Version < 16" %}

{
  "targets": {
    "clean-db": {
      // Workaround task
      "command": "nx clean db"
    },
    "e2e": {
      "dependsOn": ["clean-db"] // Run clean-db on this project
    }
  }
}

{% /tab %} {% /tabs %}

This will make it so that all you need to do is run nx e2e store and Nx will make sure that nx clean db is run first.