Handle multiple observables in Angular

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by Abdul Rawoof A R dot icon Updated: Jan 22, 2024

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Observables offer help passing messages among elements of your application. Developers use them in Angular as a technique for event handling. They also use them for asynchronous programming and handling many values. 

 Angular uses observables as an interface to manage many familiar asynchronous operations. For example, the HTTP module utilizes observables to handle AJAX requests and responses. The Router and Forms modules use observables to listen for user-input events. They also use observables to respond to these events. We can use the concat operator to combine many Observables. It creates a new Observable that emits values from each Observable in sequence. It works through the means of subscribing to them for my part and merging the outcomes in Observable output. An Observable will emit activities. A described callback executes for every event. If you need to address an unmarried event, use Promise. If you need to circulate a couple of activities from the identical API, use Observables. 

 Types of Observables in Angular:  

  • Observable.  
  • Flowable.  
  • Single.  
  • Completable. 

Here is an example of how to handle multiple observables in Angular: