Custom metric for WebPageTest to detect single page application frameworks

SPA.js

var SPA="none";

if (typeof(app)=="object") SPA = "unknown";

if (window.hasOwnProperty('require')) {
  if(window.require.hasOwnProperty('defined')){
    if(window.require.defined('troopjs-compose/decorator')) SPA = "troop";
    if(window.require.defined('flight/lib/component')) SPA = "flight";
  }
}

if (typeof(window.Polymer)=="function") SPA = "polymer";
if (typeof(window.React)=="object") SPA = "react";
if (typeof(window.Vue)=="function") SPA = "vue";
if (typeof(window.aureliaDatabase)=="object") SPA = "aurelia";
if (typeof(window.angular)=="object") SPA = "angular";
if (typeof(window.ko)=="object") SPA = "knockout";
if (typeof(window.Backbone)=="object") SPA = "backbone";
if (typeof(window.ko)=="object" && typeof(window.Backbone)=="object") SPA = "knockback";
if (typeof(window.dojo)=="object") SPA = "dojo";
if (typeof(window.can)=="object") SPA = "can";
if (typeof(window.ampersand)=="object") SPA = "ampersand";

if (window.hasOwnProperty('m')) {
  if (window.m.hasOwnProperty('render')) {
    if (typeof(window.m.render)=="function") SPA = "mithril";
  }
}

return SPA;