JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js"></script>

<pre id="code"></pre>

<pre id="code2"></pre>

JavaScript

var a = {
    a : 1,
    b : 2
};

function transformObject(obj) {
    var ref = obj;
    _.each(ref, function(val, index){
    	ref[index] = val*2;
    });
    return ref;
}

s=JSON.stringify
$('#code').text(s(transformObject(a)))
$('#code2').text(s(a))