What is an ng-template?

ng-template is an Angular element that is used for rendering HTML in a template. However, it is not rendered directly on DOM. If you include an ng-template tag to a template, the tag and the content inside it will be replaced by comment upon render.

Why do we use ng-template?

ng-template is used to render HTML in a template but is never rendered directly. If you add a ng-template tag to your template, it and everything inside it will be replaced by a comment. It might seem a bit useless, but it is rarely used alone. It can be for example used to define the else case of an *ngIf.

What is the difference between ng-template and Ng-container?

In simple terms, ng-container is like a Higher component of React, which only aids in the rendering of its child elements. ng-template is basically for internal implementation of Angular, wherein anything inside the ng-template is completely ignored while rendering and it basically becomes a comment on view source.

Where do you put ng templates?

ng-template should be used along with structural directives like [ngIf],[ngFor],[NgSwitch] or custom structural directives. That is why in the above example the contents of ng-template are not displayed. ng-template never meant to be used like other HTML elements.

What is let item in ng template?

The let keyword declares a template input variable that you can reference within the template. The input variables in this example are hero , i , and odd .

What is ViewContainerRef in Angular?

ViewContainerRef represents a container where one or more views can be attached. The first thing to mention here is that any DOM element can be used as a view container. What’s interesting is that Angular doesn’t insert views inside the element, but appends them after the element bound to ViewContainer .

What is Ngcontent in Angular?

The ng-content tag is used for content projection. It is basically a placeholder to hold the dynamic content until it is parsed. Once the template is parsed, Angular replaces the tag with content.

What does template do in Angular?

A template is a form of HTML that tells Angular how to render the component. Views are typically arranged hierarchically, allowing you to modify or show and hide entire UI sections or pages as a unit. The template immediately associated with a component defines that component’s host view.

Can I use NgIf and ngFor together?

Best way to use ngFor and ngIf together is to use element to write one of the structural directive. ng-container allows us to create a separate section in a template without adding it to DOM. The ng-container does not get added to the DOM, but content inside it is rendered.

What is TemplateRef and ViewContainerRef?

TemplateRef is an embedded template which you can use in ViewContainerRef. createEmbeddedView to create Embedded View. *ngFor is doing the same, it reads the element as a TemplateRef and injects mutiple times to create view with data. TemplateRef cannot be used as an element for css decorations in .ts.

How do I get ng template reference in component?

To get started using template reference variables, simply create a new Angular component or visit an existing one. To create a template reference variable, locate the HTML element that you want to reference and then tag it like so: #myVarName .

What is NgIf and NgFor in Angular?

NgIf conditionally displays items by adding or removing them from the DOM depending on the condition. NgFor renders a list of items from iterable objects.