JSFiddle - React, Tailwind, and code Playground
JavaScript
var obj = {
param1: 'something',
param2: 'somethingelse',
param3: 'another'
}
obj["param4"] = 'yetanother';
var str = "";
for (var key in obj) {
if (str != "") {
str += "&";
}
str += key + "=" + obj[key];
}
console.log(str);