JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = {
    "uname": ["fnem,ynem,onem"],
    "Oname": ["anam,snam,dnam"],
    "osize": ["1,2,3"]
};

for (var i = 0; i < 3; i++) {
    var str="";
    for (var property in data) {
        if (data.hasOwnProperty(property)) {
            str+=" "+data[property][0].split(',')[i];
        }
    }
    alert(str);
}