if (window.angular.bootstrap) {
//AngularJS is already loaded, so we can return here...
console.log('WARNING: Tried to load angular more than once.');
return;
}
//這段代碼是多次加載angularjs 輸出的警告
// 多次通過angular.bootstarp啟動ng-app輸出的錯誤在那個 bootstrap function里面throw的ngMinError
