JSFiddle - React, Tailwind, and code Playground

JavaScript

arrayToSort = [
     {
        "name": "Robert",
        "age":32,
        "country": "UK"
    },
    {
        "name": "Prasad",
        "age":28,
        "country": "India"
    },
    {
        "name": "Prasad",
        "age":24,
        "country": "India24"
    },
    {
        "name": "Benny",
        "age":45,
        "country": "USA"
    },
    {
        "name": "Robin",
        "age":34,
        "country": "UK"
    },
    {
        "name": "Bob",
        "age":20,
        "country": "India"
    }
];

var sort_by = function(field, reverse, primer){
    var key = primer ? 
         function(x) {return primer(x[field]); }:
         function(x) {return x[field] };
    reverse = [-1, 1][+!!reverse];
    return function (a, b) {
        a = key(a);
        b = key(b);
        return a==b ? 0 : reverse * ((a > b) - (b > a));
    }
}

var chainSortBy = function(sortByArr) {
    return function(a, b) {
        for (var i=0; i<sortByArr.length; i++) {
            var res = sortByArr[i](a,b);
            if (res != 0)
                return res;
        }
        return 0;
    }
}

arrayToSort.sort(
    chainSortBy([
        sort_by( "name", true, function(a){
            return a.toUpperCase();
        }),
        sort_by("age", true, null)
    ])
);

console.log(arrayToSort); //Check browser console.