i need your help, trying to change image source by class clicking button butnit returns error

Question

https://code.sololearn.com/WnDrpVXp4dNW/?ref=app

Answer 1

Yout script are running before the html element are created, run your script after the page loaded
window.onload = function(){
//your code
}

Answer 2

No sweat. Thanks for understanding. 😊

Answer 3

thanks

Answer 4

sorry for this