如何在单独的 cmd 窗口或终端中启动 nodejs 子进程

Question

I want to start a nodejs child process in a separate console window rather than of listening to its data event.

as per the Documentation

with the detached option, the child supposes to have its own console window but it's not happening.

my code in main.js

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

var child = spawn("node", ["./count.js"], {
    detached: true,
    stdio: 'ignore'
});

in the count.js file, I have

console.log(`running in child process with PID ${process.pid})

Answer 1

The only solution I've found to work on windows 10 is to spawn a separate cmd.exe process entirely:

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

var child = spawn("cmd.exe", ["/c", "node", "count.js"], {
    detached: true,
    stdio: 'ignore'
});

Also be sure to add some delay to your child process so it doesn't quit before you can see it:

console.log(`running in child process with PID ${process.pid}`);

// wait 5 seconds before closing
setTimeout(() => true, 5000);

And finally, if you want your child window to be entirely independent from the parent (stays open even when the parent closes), you should unref it after you spawn it:

child.unref();