Area chart implemented. Shorter arrow functions from https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functions#Shorter_functions are used
Area chart implemented.
Shorter arrow functions from
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functions#Shorter_functions
are used

arunsoman/polymer-d3,arunsoman/polymer-d3