Testing keypress events using Mousetrap, a simple library for handling keyboard shortcuts in Javascript.
Numbers 0 to 9 will render Japanese equivalent using unicode characters. To hear audio of Japanese numbers
forked from eesur's block: d3 | keypress/keyboard events
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.min.js
https://cdnjs.cloudflare.com/ajax/libs/mousetrap/1.4.6/mousetrap.js