Can someone explain me why answerEl is used instead of answerEls in line 172. Help me with my study thank you

Question

https://code.sololearn.com/Wr3OObZyA3Jd/?ref=app

Answer 1

answerEl is a list of items and answerEls is array which consists that items and to iterate over each item we are using forEach loop there to checked

Answer 2

This is an enumeration of answerEls elements, which are passed to the function argument. You can give the argument a name at your discretion.

forEach() is an improved for() cycle in ES6.

answerEls.forEach(elem => {
if(elem.checked) {
answer = elem.id
}
})

Deprecated syntax:
function func(arg){
if(arg.checked) {
answer = arg.id
}
}
for(let el of answerEls){
func(el)
}