JSFiddle - React, Tailwind, and code Playground

by gdanko

JavaScript

var qs = new Object();
qs.foo = 'bar';
qs.bar = 'foo';
qs.nc = undefined;

for(var prop in qs) {
    if(qs[prop] === undefined) {
        document.write(prop + '=' + qs[prop] + '<br>' );
    }
}