I get Error: Invalid arguments when using .delay(1500)

[zeuzere]

I get Error: Invalid arguments when i use
return Rx.Observable.of(null).delay(1500)......

When i use the original Rx, i have no error, when i use the extension i get this error...
I saw the original use number | Date while the rx-dom use 2 seperate function...

Any one know how to resolve this ?

I'm using nodejs, Typescript and types/rx-dom

[zeuzere]

Well i resolved this by using
var retryAfterDelay = new Date();
retryAfterDelay.setSeconds(retryAfterDelay.getSeconds() + (retryAfter/1000) )

so i use the Date instead of the number...

But how to use with number ? instead of Date