JSFiddle - React, Tailwind, and code Playground

by Warspawn

HTML

<div id="output" />

JavaScript

var obj = {};
obj["key1"] = [1, 2, 3];
obj["key2"] = [5, 6, 7];
obj["key1"] = [3, 3, 3, 3];
obj["key3"] = [4, 4, 4, 4];

for (var key in obj) {
    $("<li />").html(key + ": " + obj[key]).appendTo($("#output"));
}