JSFiddle - React, Tailwind, and code Playground

JavaScript

$(function(){
   
    var item=  {
"items": [
{ "FirstName":"John" , "LastName":"Doe" }, 
{ "FirstName":"Anna" , "LastName":"Smith" }, 
{ "FirstName":"Peter" , "LastName":"Jones" }
]
}
    $.each(item.items, function(index,item) {        
        alert(item.FirstName+" "+item.LastName)
        });
    
});