Open multiple iTerm tabs in the same directory and run individual commands

iterm-jxa.js

// paste this script in Script Editor on macOS

iTerm = Application('iTerm2')
iTerm.includeStandardAdditions = true;

// change to the path to your directory
var dir = '/path/to/project'

var win 

// checks if an iTerm window already exists
if (iTerm.currentWindow()) {
	win = iTerm.currentWindow();
} else {
	win = iTerm.createWindowWithDefaultProfile();
}

// change to the commands you'd like to run
var commands = [
	'npx serverless offline',
	'npx nx dev frontend'
];

for (var i = 0; i < commands.length; i++) {
	
	if (win.tabs.length < i + 1) {
		win.createTabWithDefaultProfile();
	}
	
	win.tabs[i].sessions[0].write({ 
		text: 'cd ' + dir, 
		newline: true 
	});
	
	win.tabs[i].sessions[0].write({ 
		text: commands[i], 
		newline: true 
	});

}