node_spawn_sudo_command.js

const cp = require("child_process");
const cmd = cp.spawn("sudo", ["-S", "ls", "-lh", "/usr"]);

cmd.stdout.on("data", data => {
	console.log(`stdout: ${data}`);
});

cmd.stderr.on("data", data => {
	console.log(`stderr: ${data}`);
	if (String(data).match(/Password:/i)) {
		cmd.stdin.write(SUDO_PASSWORD + "\n");
	}
});

cmd.on("close", code => {
	console.log(`child process exited with code ${code}`);
});

Use with SUDO_PASSWORD=mypassword node ./node_spawn_sudo_command.js