Скачать или смотреть Angular 5 Tutorial in Hindi Part 28: Fetch Data from Server using HTTP in Angular 5 in Hindi

Welcome, all, we will see how to Fetch Data from the server JSON file using HTTP get in Angular 5 in Hindi.
Here are the four steps
1: We have to request to the server using HTTP Get.
2: We will get/receive response(Observable) from
server and we need to cast into an array form so the component can use it.
3: we need to subscribe the observable from the
component classes to use it.
4: we need to assign the value to the local variable
of the component to display.

You can think of an observable as HTTP response (an array) whose items arrive asynchronously over time. Observables help you manage asynchronous data, such as data coming from a backend service. Observables are used within Angular itself, including Angular’s event system and its HTTP client service. To use observables, Angular uses a third-party library called Reactive Extensions (RxJS). It enables us to work with Observable In Angular. In a real-world example, we can say that the Internet service offered by mobile devices is observable. It is available only to the people who have subscribed to it.

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