JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content"></div>

JavaScript

var users = [{'Name' : 'John', 'Attributes' : {'Age' : 5, 'Height' : 1.5, 'Clothes' : {'Shirts' : 5, 'Pants' : 8}}}, {'Name' : 'Andrew', 'Attributes' : {'Age' : 9, 'Height' : 1.8, 'Clothes' : {'Shirts' : 2, 'Pants' : 5}}}, {'Name' : 'Lucifer', 'Attributes' : {'Age' : 11, 'Height' : 1.3, 'Clothes' : {'Shirts' : 9, 'Pants' : 4}}}];

var a = users[0];
var attr = "Height";
console.log(a["Attributes"][attr]);