HTML:
<div class="promo_tumbs col_12">
<div data-dir="prev" class="prev"></div>
<div data-dir="next" class="next"></div>
<div class="promo_tumbs_centar">
<a href="#first"><div class="promo_tumb promo_tumb_current">Test</div></a>
<a href="#second"><div class="promo_tumb">Test</div></a>
<a href="#thrid"><div class="promo_tumb">Test</div></a>
<a href="#fourh"><div class="promo_tumb">Test</div></a>
<a href="#fifth"><div class="promo_tumb">Test</div></a>
<a href="#fifth"><div class="promo_tumb">Test</div></a>
<a href="#fifth"><div class="promo_tumb">Test</div></a>
</div>
</div>
JavaScript:
function Slider(container, nav) {
this.container = container;
this.nav = nav;
this.li = this.container.find('li');
this.li_width = this.li.first().width();
this.li_len = this.li.length;
this.thumbs = this.nav.find('a');
this.current = 0;
}
Slider.prototype.transition = function(coords) {
this.container.stop().animate({
'margin-left': coords || -(this.current * this.li_width)
})
}
Slider.prototype.set_current = function(dir) {
var pos = this.current;
if (dir === 'next') {
pos++
}
else if (dir === 'prev') {
pos--
}
this.current = (pos < 0) ? this.li_len - 1 : pos % this.li_len;
return pos;
}
var slider = new Slider($('div.promo_inner ul'), $('div.promo_tumbs'));
slider.nav.find('div').on('click', function() {
if ($(this).attr("data-dir") === undefined) {
var index = slider.thumbs.index($(this).parent('a'));
console.log(index)
} else {
slider.set_current($(this).data('dir'));
}
slider.transition();
})
当我单击元素时,我得到两个值-单击元素的索引和-1。这里发生了什么?我怎样才能松开 -1 并只获得索引值?