canvas

by evgkch

HTML

<div id='root'>
  <canvas id="canvas" />
</div>

CSS

html,
    body,
    body#root {
      margin: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
    }

JavaScript

// Event Emitter
!function(e){"use strict";function t(){}function n(e,t){for(var n=e.length;n--;)if(e[n].listener===t)return n;return-1}function r(e){return function(){return this[e].apply(this,arguments)}}function i(e){return"function"==typeof e||e instanceof RegExp||!(!e||"object"!=typeof e)&&i(e.listener)}var s=t.prototype,o=e.EventEmitter;s.getListeners=function(e){var t,n,r=this._getEvents();if(e instanceof RegExp){t={};for(n in r)r.hasOwnProperty(n)&&e.test(n)&&(t[n]=r[n])}else t=r[e]||(r[e]=[]);return t},s.flattenListeners=function(e){var t,n=[];for(t=0;t<e.length;t+=1)n.push(e[t].listener);return n},s.getListenersAsObject=function(e){var t,n=this.getListeners(e);return n instanceof Array&&(t={},t[e]=n),t||n},s.addListener=function(e,t){if(!i(t))throw new TypeError("listener must be a function");var r,s=this.getListenersAsObject(e),o="object"==typeof t;for(r in s)s.hasOwnProperty(r)&&-1===n(s[r],t)&&s[r].push(o?t:{listener:t,once:!1});return this},s.on=r("addListener"),s.addOnceListener=function(e,t){return this.addListener(e,{listener:t,once:!0})},s.once=r("addOnceListener"),s.defineEvent=function(e){return this.getListeners(e),this},s.defineEvents=function(e){for(var t=0;t<e.length;t+=1)this.defineEvent(e[t]);return this},s.removeListener=function(e,t){var r,i,s=this.getListenersAsObject(e);for(i in s)s.hasOwnProperty(i)&&-1!==(r=n(s[i],t))&&s[i].splice(r,1);return this},s.off=r("removeListener"),s.addListeners=function(e,t){return this.manipulateListeners(!1,e,t)},s.removeListeners=function(e,t){return this.manipulateListeners(!0,e,t)},s.manipulateListeners=function(e,t,n){var r,i,s=e?this.removeListener:this.addListener,o=e?this.removeListeners:this.addListeners;if("object"!=typeof t||t instanceof RegExp)for(r=n.length;r--;)s.call(this,t,n[r]);else for(r in t)t.hasOwnProperty(r)&&(i=t[r])&&("function"==typeof i?s.call(this,r,i):o.call(this,r,i));return this},s.removeEvent=function(e){var t,n=typeof e,r=this._getEvents();if("string"===n)delete r[e];else...