if (window.angular.bootstrap) {
//AngularJS is already loaded, so we can return here...
console.log('WARNING: Tried to load angular more than once.');
return;
}
//这段代码是多次加载angularjs 输出的警告
// 多次通过angular.bootstarp启动ng-app输出的错误在那个 bootstrap function里面throw的ngMinError
