How to execute 'npm run' command programmatically?

Question

I have some custom testing script, which I can run with npm run test command, which executes some Node script for starting e2e/unit tests. But before it I must star

Answer 1

Use PM2, it is really usefull and easy...

npm install pm2

const pm2 = require('pm2');

pm2.start({
    script: 'npm -- run monitorTheWeather',
    autorestart : false 
  }, (err, apps) => {
    pm2.disconnect()
    if (err) { throw err }
  })

Answer 2

You can use exec to run from script

import {series} from 'async';
const {exec} = require('child_process');

series([
 () => exec('npm run dev'),
 () => exec('npm run test')
]); 

Answer 3

Just install npm:

npm install npm

Then in your program:

npm.commands.run('dev', (err) => { ... });

See the source for more info. The npm.command object is an unofficial API for npm. Note that using exec or spawn to execute npm is safer, since the API is unofficial.