JSFiddle - React, Tailwind, and code Playground

JavaScript

var Obj = {
  Type: {
    message: "This field is required"
  },
  Bonus1: {
    message: "This field is required"
  },
  Bonus2: {
    message: "This field is required"
  },
  Bonus3: {
    message: "This field is required"
  },
  Date: {
    message: "This field is required"
  },
  Time: {
    message: "This field is required"
  }
};

var message = "";
 $.each(Obj, function(i, v){
  if(i.match(/Bonus/g))
  {
    i = i.concat(', ');
    message += i + ": " +v.message + "\n";
  }  
 
   //message += i + ": " +v.message + "\n";
 });
 alert(message);