Pls how can i solve this issue on my code cannot set property of 'onplaying' to a null ,it was working before it just started

Question

https://code.sololearn.com/W2cUiB343Dhp/?ref=app

Answer 1

its working on ios but not working on android

Answer 2

put the entire script into window load event

window.addEventListener("load",()=>{

//your script here

});