JSFiddle - React, Tailwind, and code Playground

HTML

<!-- The JavaScript “this” Keyword Deep Dive: Nested Functions -->

<!-- http://blog.kevinchisholm.com/ -->

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script>
var log = function(msg){jQuery('body').append('<div>' + msg + '</div>')};
</script>

JavaScript

window.music = "classical";
 
var foo = function (){
        	return this.music;
};
 
log(this.music); //"classical" (global)
 
log(foo()); //"classical" (global)