How do make it required you have to check a answer?

Question

He! I'm making a quiz with html and javascript. But I ran in to a problem: How do I make it required that you have to check a answer. And then you are allowed to press next. So you can't continue to the next question if you didn't fill in a answer.

I tried to add required at the end in the radio button input but that doesn't work unfortunately.

https://jsfiddle.net/deorka12/rtyk1mse/

or ( on fiddle the code works better)

https://code.sololearn.com/WWPaUoFQvFjr/#html

I hope somebody has some tips/ideas/answers!

Answer 1

Is not letting me see the code,so this may not be an accurate suggestion,but. Did you try by adding a script with an IF code and set it with the condition that if your radio input is null have an alert saying that it needs to be filled?

Answer 2

padd a condition to the next button..if radio button = false to either not work or give an error message saying please choose an answer to continue.

id help with the code but jsfiddle unreadable on my phone

Answer 3

Thanks for the feedback! Here is another link: https://code.sololearn.com/WWPaUoFQvFjr