How can I run multiple npm scripts in parallel?

Question

In my package.json I have these two scripts:

  \"scripts\": {
    \"start-watch\": \"nodemon run-babel index.js\",
    \"wp-server\": \"webpack-         


        

Answer 1

If you're using an UNIX-like environment, just use & as the separator:

"dev": "npm run start-watch & npm run wp-server"

Otherwise if you're interested on a cross-platform solution, you could use npm-run-all module:

"dev": "npm-run-all --parallel start-watch wp-server"

Answer 2

My solution is similar to Piittis', though I had some problems using Windows. So I had to validate for win32.

const { spawn } = require("child_process");

function logData(data) {
    console.info(`stdout: ${data}`);
}

function runProcess(target) {
    let command = "npm";
    if (process.platform === "win32") {
        command = "npm.cmd"; // I shit you not
    }
    const myProcess = spawn(command, ["run", target]); // npm run server

    myProcess.stdout.on("data", logData);
    myProcess.stderr.on("data", logData);
}

(() => {
    runProcess("server"); // package json script
    runProcess("client");
})();

Answer 3

Just add this npm script to the package.json file in the root folder.

{
  ...
  "scripts": {
    ...
    "start": "react-scripts start", // or whatever else depends on your project
    "dev": "(cd server && npm run start) & (cd ../client && npm run start)"
  }
}

Answer 4

A better solution is to use &

"dev": "npm run start-watch & npm run wp-server"

Answer 5

npm install npm-run-all --save-dev

package.json:

"scripts": {
  "start-watch": "...",
  "wp-server": "...",
  "dev": "npm-run-all --parallel start-watch wp-server"
}

More info: https://github.com/mysticatea/npm-run-all/blob/master/docs/npm-run-all.md

Answer 6

You can use one & for parallel run script

"dev": "npm run start-watch & npm run wp-server"

Reference link