Stop watching a stream of data when it reaches a specific value

Is there a way to automatically unsubscribe from an observable upon receiving a specific value?

For example:

 let tempSub: Subscription = this.observable$.subscribe(value => {
    if (value === 'somethingSpecific') {
      tempSub.unsubscribe(); 
      // This approach doesn't work as expected
      // due to the fact that tempSub becomes undefined here
    }
  });

Answer №1

To filter out specific values, you can utilize the takeWhile operator.

source.takeWhile(value => value === 'specificValue');

Alternatively,

this.observable$
.takeWhile(val => val === 'specificValue')
.subscribe(result => {
 // .. perform some action
});

Remember to import the necessary dependency.

Check out this example here: https://jsfiddle.net/example123/qwertyuiop/

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