Why am i getting error?

Question

Help me fix this.

https://code.sololearn.com/W5oNIU3S9pRz/?ref=app

Answer 1

change the onload to this
window.onload=main;

then the set interval to
setInterval(()=>move(box),500)

you also have typo for id button

Answer 2

Not working, the event handler starts on the go, doesn't waits.

Answer 3

not recomended way to write it, but here

startBttn.onclick=e=>setInterval(()=>{move(box)},500);

you can clean it up

Answer 4

Why can't i use main() instead of main & move(box) instead of move?

Answer 5

on-something require a function to work, when you use main() it will run the function and take its returned value instead of the function itself

so in your previous code

window.onload = main();

main will executed and the value it returned (which is undefined) will be assigned to onload, its all because you're using ().

but without (), the browser wont execute the code, and instead treat the function itself like normal value to passed around

Answer 6

Ok thankyou very much.