JSFiddle - React, Tailwind, and code Playground

HTML

<input text='test' type='button' />

JavaScript

$('input').click(function() {
    myTest();
});

function myTest() {
    var pList = new Object();
    pList["test"] = "test";
    pList["test1"] = "test1";
    pList["test2"] = "test2";
    pList["test3"] = "test3";
    pList["test4"] = "test4";
    
    displayData(pList);
    
    console.log(pList);
    
}
function displayData(badData){
    var newBadData = clone(badData);
    
    delete newBadData.test;
    
    console.log(newBadData);
}
//source http://stackoverflow.com/a/728694/1143670
function clone(obj) {
    if (null == obj || "object" != typeof obj) return obj;
    var copy = obj.constructor();
    for (var attr in obj) {
        if (obj.hasOwnProperty(attr)) copy[attr] = obj[attr];
    }
    return copy;
}