[node.js] How to execute the start script with Nodemon

How can I execute the start script from a package.json file with Nodemon?

Add this to script object from your project's package.json file

    "start":"nodemon index.js"

It should be like this

    "scripts": {
        "start":"nodemon index.js"
    }

To avoid a global install, add Nodemon as a dependency, then...

package.json

"scripts": {
    "start": "node ./bin/www",
    "start-dev": "./node_modules/nodemon/bin/nodemon.js ./bin/www"
  },

If you have nodemon installed globally, simply running nodemon in your project will automatically run the start script from package.json.

For example:

"scripts": {
  "start": "node src/server.js"
},

From the nodemon documentation:

nodemon will also search for the scripts.start property in package.json (as of nodemon 1.1.x).

Use -exec:

"your-script-name": "nodemon [options] --exec 'npm start -s'"

If globally installed then

"scripts": {
    "start": "nodemon FileName.js(server.js)",
},

Make sure you have installed nodemon globally:

npm install -g nodemon

Finally, if you are a Windows user, make sure that the security restriction of the Windows PowerShell is enabled.

In package json:

"scripts": {
  "start": "node index",
  "dev": "nodemon index"
},

"devDependencies": {
  "nodemon": "^2.0.2"
}

And in the terminal for developing:

npm run dev

And for starting the server regular:

npm start

This will be a simple command for this

nodemon --exec npm start

In package.json file. change file like this

"scripts":{ 
   "start": "node ./bin/www", 
   "start-dev": "nodemon ./app.js"
 },

and then execute npm run start-dev

You can also install nodemon globally for frequent use:

npm i nodemon -g or sudo npm i nodemon -g

then edit your package.json:

  "scripts": {
    "start": "node index.js",
    "dev": "nodemon index.js"
  },

Generally, 'dev' specifies developmental use (npm run dev).

It will depend on types of your Nodemon installation. If you install Nodemon globally by using commands (npm install nodemon --global or npm install nodemon -g), you do not have to specify any script for Nodemon in your package.json file. Just executing command nodemon index.js will run your project.

But if you install Nodemon locally by command npm install nodemon then you have to specify the script. If you name it as start then npm run start or npm start will trigger the server to run.

// Absolutely no need for global installation
 "scripts": {
    "start": "nodemon index.js"
  }

I use Nodemon version 1.88.3 in my Node.js project. To install Nodemon, see in https://www.npmjs.com/package/nodemon.

Check your package.json, see if "scripts" has changed like this:

  "scripts": {
    "dev": "nodemon server.js"
  },

server.js is my file name, you can use another name for this file like app.js.

After that, run this on your terminal: npm run dev

In package json:

{
  "name": "abc",
  "version": "0.0.1",
  "description": "my server",
  "scripts": {
    "start": "nodemon my_file.js"
  },
  "devDependencies": {
    "nodemon": "~1.3.8",
  },
  "dependencies": {

  }
}

Then from the terminal you can use npm start

Nodemon installation: https://www.npmjs.com/package/nodemon

First change your package.json file,

"scripts":
    { 
        "start": "node ./bin/www",
        "start-dev": "nodemon ./app.js"
    },

After that, execute command

npm run start-dev

Nodemon emits events upon every change in state; start, restart crash, etc. You can add a Nodemon configuration file (nodemon.json) like so:

{
   "events": {
       "start": "npm run *your_file*"
   }
}

Read more in Nodemon events — run tasks at server start, restart, crash, exit.

I know it's 5 years late, if you want to use nodemon.json you may try this,

{
  "verbose": true,
  "ignore": ["*.test.js", "fixtures/*"],
  "execMap": {
    "js": "electron ." // 'js' is for the extension, and 'electron .' is command that I want to execute
  }
}

The execMap will execute like a script in package.json, then you can run nodemon js

I have a TypeScript file called "server.ts", The following npm scripts configures Nodemon and npm to start my app and monitor for any changes on TypeScript files:

"start": "nodemon -e ts  --exec \"npm run myapp\"",
"myapp": "tsc -p . && node server.js",

I already have Nodemon on dependencies. When I run npm start, it will ask Nodemon to monitor its files using the -e switch and then it calls the myapp npm script which is a simple combination of transpiling the typescript files and then starting the resulting server.js. When I change the TypeScript file, because of -e switch the same cycle happens and new .js files will be generated and executed.