+ 2
Why error if i click on anywhere
It said cannot read property of classList of null https://code.sololearn.com/Wst08cUjJzZN/?ref=app
2 Answers
+ 2
place your js code inside this function
window.onload=function(){
}
Use search bar to search for similar question if you want to know what window.onload do and why is it used ,by default sololearn places js script inside head element and so it gets executed before the body part