jsfiddle-console example

https://github.com/eu81273/jsfiddle-console

HTML

<script src="https://cdn.jsdelivr.net/gh/eu81273/jsfiddle-console/console.js"></script>
<a href="#">First test</a>


<a href="#"><h2> Second  test</h2></a>


<a href="#"><p>Third Test</p></a>

CSS

a{
  font-size: 40px;
}

h2{
  font-size: 20px;
}

p{
  font-size: 10px;
}

JavaScript

var a = document.getElementsByTagName('a');


for (var i= 0; i < a.length; ++i){
	var style = window.getComputedStyle(a[i], null).getPropertyValue('font-size');
  var fontSize = parseFloat(style); 
  console.log(a[i].textContent + "  | font-size:" + fontSize);  
  console.log("-----------");

}