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why nextDot.length === 0?
Lesson: Next Dot 2. Exercise 7/12 Interactive website flipboard. Why are we checking if(nextDot.length === 0) ?
Why are we using .length?
Why are we checking it === 0 ?
If , if(nextDot.length === 0) is true, wouldn’t that just mean the first item of the dot class? like variable[0] in javascript and other language arrays? How are they different?
Thanks.
Answer 55355ef693767641da000292
0 votes
var main = function(){ $(‘.dropdown-toggle’).click(function(){ $(‘.dropdown-menu’).toggle(); });
$('.arrow-next').click(function(){
var currentSlide = $('.active-slide');
var nextSlide = currentSlide.next();
var currentDot = $('.active-dot');
var nextDot = currentDot.next();
if(nextSlide.length == 0) {
nextSlide = $('.slide').first();
nextDot = $('.dot').first();
}
currentSlide.fadeOut(600).removeClass('active-slide');
nextSlide.fadeIn(600).addClass('active-slide');
currentDot.removeClass('active-dot');
nextDot.addClass('active-dot');
});
$('.arrow-prev').click(function(){
var currentSlide = $('.active-slide');
var prevSlide = currentSlide.prev();
var currentDot = $('.active-dot');
var prevDot = currentDot.prev();
if(prevSlide.length == 0) {
prevSlide = $('.slide').last();
prevDot = $('.dot').last();
}
currentSlide.fadeOut(600).removeClass('active-slide');
prevSlide.fadeIn(600).addClass('active-slide');
currentDot.removeClass('active-dot');
prevDot.addClass('active-dot');
});
};
$(document).ready(main);
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