Angular

AfterViewInit, AfterContentInit, AfterViewChecked & AfterContentChecked are the life cycle hooks. Angular raise them during the lifecycle of a Component. In this tutorial, we will learn what are they and when Angular invokes them. We also learn the difference between the AfterViewInit Vs AfterContentInit Vs AfterViewChecked & AfterContentChecked.

The ContentChild & ContentChildren are decorators, which we use to Query and get the reference to the Projected Content in the DOM. Projected content is the content that this component receives from a parent component.

The Renderer2 allows us to manipulate the DOM elements, without accessing the DOM directly. It provides a layer of abstraction between the DOM element and the component code. Using Renderer2 we can create an element, add a text node to it, append child element using the appendchild method., etc. We can also add or remove styles, HTML attributes, CSS Classes & properties, etc. We can also attach and listen to events etc

Angular ElementRef is a wrapper around a native DOM element. In this tutorial, let us explore how to use the ElementRef to manipulate the DOM in Angular Applications.