Reactive Programming with RxJS/

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Creating Observables From Javascript Data Types

Creating Observables From Javascript Data Types

Learn to create and use Observables from JavaScript data types like arrays, events, and callback functions.

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Creating Observables from arrays

We can make any array-like object that can iterate into an Observable by using the versatile from operator. The from operator takes an array as a parameter and returns an Observable that emits each of its elements.

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Rx.Observable.from(['Adrià', 'Jen', 'Sergi']).subscribe(function(x) 
{ 
    console.log('Next: ' + x); 
}, 
function(err) 
{ 
    console.log('Error:', err); 
}, 
function() 
{ 
    console.log('Completed'); 
});

The from operator is, along with the fromEvent operator, one of the most convenient and frequently used operators in RxJS code.

Creating Observables from JavaScript events

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