ng-container vs ng-template

• <ng-container> if you need a helper element for nested structural directives like ngIf or ngFor or if you want to wrap more than one element inside such a structural directive;
• <ng-template> if you need a view "snippet" that you want to stamp at various places using ngForTemplate, ngTemplateOutlet, or createEmbeddedView().

ng-template is used for structural directive like ng-if, ng-for and ng-switch. If you use it without structural directive, nothing happens and renders.

ng-container is used when you don't have a suitable wrapper or parent container. In most cases we are using div or span as a container but in such a cases when you want to use multiple structural directive, but you can't use more than one structural directive on a element, in that case ng-container can be used as a container

• https://stackoverflow.com/questions/40529537/ng2-difference-between-ng-container-and-ng-template-tags
• https://github.com/angular/angular/issues/11994
• https://gist.github.com/jhades/0f1abb3c55cf772043ed26d9c6a50a8a
• https://blog.angular-university.io/angular-ng-template-ng-container-ngtemplateoutlet/