How to create a modern page using cusotm templage in JSOM

mytech1982 Check and try if there are any JSOM equivalent functions available for below CSOM code (code taken from this thread😞 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using ClientSidePage = OfficeDevPnP.Core.Pages.ClientSidePage;
using System.Security;

namespace CreatePageFromTemplate
{
 class Program
 {
	 static void Main(string[] args)
	 {
		 string userName = "email address removed for privacy reasons";
		 string password = "**************";
		 using (ClientContext clientContext = new ClientContext("https://Tenant.sharepoint.com/sites/SiteName"))
		 {
			 SecureString securePassword = new SecureString();
			 foreach (char c in password.ToCharArray())
			 {
				 securePassword.AppendChar(c);
			 }

			 clientContext.AuthenticationMode = ClientAuthenticationMode.Default;
			 clientContext.Credentials = new SharePointOnlineCredentials(userName, securePassword);

			 // Load the template page
			 ClientSidePage page = clientContext.Web.LoadClientSidePage("Templates/MyTemplate.aspx");

			 // Create and Save the modern page based on the template
			 page.Save("IT_Australia1.aspx");
		 }

	 }
 }
}

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