What is this error?

Question

I don't understand the error that this code produces, and I was wondering if someone could tell me why that particular error occurs.
https://code.sololearn.com/WY6iAAaxVDbb/?ref=app

Answer 1

can do it simply by changing inner html to blank space, you r having error because you are using remove child , when there is no children for those selected elements
https://code.sololearn.com/WCpfd5K3JaIO/?ref=app

Answer 2

Btw you have to press the buttons for the error to occur

Answer 3

Wow thank you

Answer 4

Why did the removeChild() method not work?

Answer 5

Thank you very much

Answer 6

But why could you not access the body in html through a variable? Usually you can

Answer 7

if u want to use remove child , access the body properly , just do this
go to JS
replace ' body' with document.getElementById("body") and see the magic , btw here's the code for that too

https://code.sololearn.com/WT7EGe1v02e3/?ref=app

Answer 8

can use body too, but inside the function, check it out one with ur body variable, other by that document.get bla bla method😋
https://code.sololearn.com/WT7EGe1v02e3/?ref=app