Why Key frames not work on android device?

Ionic Framework ionic-v3
#1

key frames work on ios perfectly but not in android device … solution on ionic4?ç_ç

#2

this work but typescript check error…

Argument type ({opacity: number} | {opacity: number, offset: number} | {opacity: number}) is not assignable to parameter type Keyframe | PropertyIndexedKeyframes | null

element.animate([ { opacity: 1 },
                  { opacity: 0.1, offset: 0.7 },
                  { opacity: 0 } ],
                2000);
#4

nothing… not work i don’t know

#5