Hey guys my function is not working

Question

Trying out set attribute
https://code.sololearn.com/WwkPloSh81Ih/?ref=app

Answer 1

Ipang
Pls don't be annoyed for disturbing you
Pls my set attribute is not working

Answer 2

My get attribute is not working
Ipang
How it not working it says undefined

Answer 3

D Doyen,
What should I do to test it? how it should be working?

Line 51:
buttons[ i ].onclick=function(){
submit();
}

Try to directly assign submit() instead

buttons[ i ].onclick = submit;

Answer 4

Ipang
This var index is throwing an error of undefined
It would call the function txt[index]() store in an array
Function submit(){
var index = this.getAttribute("index"); // button index
txt[index]()
}

Answer 5

It works the way I wrote it but var index is throwing a error of undefined when I click on the red button

Answer 6

I think I solved it now
It throws a error of undefined if I use onclick but throws no error if I use addeventlistener

Answer 7

Why
What is the difference BTW onclick and addeventlistener that makes it throw an error of undefined with onclick and does not if I use addeventlistener