# 0.1.21 (10/22/2019)
* support for angular9

# 0.1.20 (6/12/2019)
* use angular8
* act on viewer change

# 0.1.19 (5/27/2019)
* if iframe is null initially try to get it while polling if loaded.
* try for 20 seconds to load document

# 0.1.17 (5/24/2019)
* fixed interval reload check

# 0.1.16 (5/24/2019)
* fixed wrong import of Event type

# 0.1.15 (5/20/2019)
* Added loaded event to notify when google iframe is loaded (google only)
* Interval time back to 3000ms

# 0.1.14 (5/20/2019)
* Google Hack from AfterviewInit to ngOnChanges

# 0.1.13 (5/20/2019)
* support changing url with ngOnChanges