When do we have to use a period in front of the variable name and when do we not have to?
.btn is used to target a btn class of your HTML element in JS(JQuery). [Remember that a class is targeted using . while an id is #].
This is an example of a btn class.
<div class="btn"> </div>
Can you explain to me why we don't use ".active-dot" for the removeClass() and addClass() but "active-dot" instead? I thought active-dot is a class in my HTML as well?
var currentDot = $('.active-dot');
var nextDot = currentDot.next();
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