use nodemon to run npm script code example

Example 1: install nodemon globally

npm install -g nodemon

Example 2: nodemon package.json start

{
  "name": "abc",
  "version": "0.0.1",
  "description": "my server",
  "scripts": {
    "start": "nodemon my_file.js"		// <=

Example 3: nodemon a npm run command

nodemon --exec npm run dev:test