Rx.Observable.prototype.takeWhile(predicate, [thisArg])

Returns elements from an observable sequence as long as a specified condition is true.


  1. predicate (Function): A function to test each source element for a condition. The callback is called with the following information:
    1. the value of the element
    2. the index of the element
    3. the Observable object being subscribed
  2. [thisArg] (Any): Object to use as this when executing callback.


(Observable): An observable sequence that contains the elements from the input sequence that occur before the element at which the test no longer passes.