HTML5 data attribute with create a 2d chart
<div id="languages">
<div data-lang="Ecma Script 6+" data-level="65"></div>
<div data-lang="SASS" data-level="80"></div>
<div data-lang="HTML5" data-level="80"></div>
<div data-lang="PURE JS" data-level="70"></div>
<div data-lang="PHP" data-level="50"></div>
<div data-lang="REACT" data-level="40"></div>
</div>
var languages = document.querySelectorAll('#languages div');
this.languages = document.querySelectorAll('#languages div');