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FRONT END TECHNOLOGIES
FRONT END TECHNOLOGIES
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4 followers study24x7 02 Mar 2021 04:06 PM study24x7 study24x7

Lifecycle hooks A component instance has a lifecycle that starts when Angular instantiates the component class and renders the component view along with its child views. The lifecycle continues with change detection, as Angular checks to see when data-bound properties change, and updates both the view and the component instance as needed. The lifecycle ends when Angular destroys the component instance and removes its rendered template from the DOM . Directives have a similar lifecycle , as Angular creates , updates, and destroys instances in the course of execution. Your application can use lifecycle hook methods to tap into key events in the lifecycle of a component or directive in order to initialize new instances, initiate change detection when needed, respond to updates during change detection, and clean up before deletion of instances.

Lifecycle hooks
A component instance  has a  lifecycl...
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4 followers study24x7 10 Nov 2020 12:29 PM study24x7 study24x7

Introduction to Angular

Angular is a platform and framework for building single-page client applications using HTML and TypeScript. Angular is written in TypeScript. It implements core and optional functionality as a set of TypeScript libraries that you import into your apps. The architecture of an Angular application relies on certain fundamental concepts. The basic building blocks of the Angular framework are Angular components that are organized into NgModules. NgModules collect related code into functional sets; an Angular app is defined by a set of NgModules. An app always has at least a root module that enables bootstrapping, and typically has many more feature modules. Components define views, which are sets of screen elements that Angular can choose among and modify according to your program logic and data. Components use services, which provide specific functionality not directly related to views. Service providers can be injected into components as dependencies, making your code modular, reusable, and efficient. Modules, components and services are classes that use decorators. These decorators mark their type and provide metadata that tells Angular how to use them. The metadata for a component class associates it with a template that defines a view. A template combines ordinary HTML with Angular directives and binding markup that allow Angular to modify the HTML before rendering it for display. The metadata for a service class provides the information Angular needs to make it available to components through dependency injection (DI). An app's components typically define many views, arranged hierarchically. Angular provides the Router service to help you define navigation paths among views. The router provides sophisticated in-browser navigational capabilities.
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JSX in React js stands for

A

Java script XML

B

Java script extended

C

Java script extra

D

none of these

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