I'm currently building a script to create a slider and stumbled upon an error I can't seem to solve. Basically I trying to get the width of a container and multiply it base on the number of slides inside.
Here is a snippet a of the code I'm working on. Whenever I try to use .width in order to fetch the width of a container it returns undefined on the console. I tried looking back and forth on my code but I can't seem to pinpoint the issue.
_setSliderWidth() {
this.sliderBanner = this.$el.find('.slider-banner');
this.sliderBannerWidth = this.sliderBanner.width();
console.log(this.sliderBannerWidth);
this.slides.width(this.sliderBannerWidth);
this.slidesContainer.width(this.sliderBanner.width() * this.slideCount);
}
-- -- -- -- --
'use strict';
(function($) {
/**
* Base Image Slider class
*/
class ImageSlider {
constructor(el) {
this.$el = $(el);
this._dom();
this.slideCount = this.slides.length;
this.currentSlide = 0;
this.arrows = {
prev: this.$el.find('.arrow.-prev'),
next: this.$el.find('.arrow.-next')
};
// image formatting and detection
this.$el.find('img').each(function(e, el) {
let $img = $(el);
if ($img.height() > $img.width())
$img.addClass('-portrait');
});
this._setSliderWidth();
}
_dom() {
this.slides = this.$el.find('.slides');
this.slidesContainer = this.$el.find('.slider-items');
}
init() {
this._bind();
this._evaluatePosition();
}
_bind() {
this.arrows.next.on('click', this._nextSlide.bind(this));
this.arrows.prev.on('click', this._prevSlide.bind(this));
}
_nextSlide() {
this.currentSlide++;
this._moveSlide();
}
_prevSlide() {
this.currentSlide--;
this._moveSlide();
}
_setSliderWidth() {
this.sliderBanner = this.$el.find('.slider-banner');
this.sliderBannerWidth = this.sliderBanner.width();
console.log(this.sliderBannerWidth);
this.slides.width(this.sliderBannerWidth);
this.slidesContainer.width(this.sliderBanner.width() * this.slideCount);
}
_moveSlide() {
// set the min and max range
if (this.currentSlide < 0) this.currentSlide = 0;
if (this.currentSlide > this.slideCount - 1) this.currentSlide = this.slideCount - 1;
this._evaluatePosition();
this._move();
}
_move() {
let position = this.currentSlide * -100;
this.slidesContainer.css({
transform: 'translate(' + position + '%, 0)'
});
}
_evaluatePosition() {
this.arrows.prev.toggleClass('-hide', (this.currentSlide === 0));
this.arrows.next.toggleClass('-hide', (this.currentSlide === this.slideCount - 1));
}
}
$(document).ready(function() {
//--------------------------------------------------
// Image Slider
let $imageSliders = $('.image-slider');
$imageSliders.each(function(e, el) {
let imageSlider = new ImageSlider(el);
imageSlider.init();
});
//--------------------------------------------------
// Slider Banner
let $bannerSliders = $('.slider-banner');
$bannerSliders.each(function(e, el) {
let bannerSlider = new ImageSlider(el);
bannerSlider.init();
});
});
})(jQuery);
HTML
<div class="slider-banner -alternate">
<span href="#" class="arrow -prev -hide"></span>
<span href="#" class="arrow -next"></span>
<div class="slider-items">
<div class="slides">
<div class="image" style="background-image:url(/iom/sites/default/files/2018-07/partnerships-2_0.jpg)">
<div class="banner-detail">
<div class="article-detail">
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<a href="#" class="tag-label">page</a>
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<h2 class="title">
<a href="#">Migrant Integration</a>
</h2>
<div class="mini-caption">
IOM supports policies and strategies that promote the social, economic and cultural inclusion of migrants within existing legal frameworks in countries of destination.
</div>
<a href="/iom/node/65348" class="button">More Details</a>
</div>
</div>
</div>
</div>
<div class="slides">
<div class="image" style="background-image:url(/iom/sites/default/files/2018-07/definitional-issues_1.jpg)">
<div class="banner-detail">
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</div>
<a href="/iom/forum-migration-trade-and-global-economy" class="button">More Details</a>
</div>
</div>
</div>
</div>
<div class="slides">
<div class="image" style="background-image:url(/iom/sites/default/files/2018-07/identity-management_0.jpg)">
<div class="banner-detail">
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<div class="timestamp">
<a href="#" class="tag-label">page</a>
</div>
<h2 class="title">
<a href="#">Comparative Research on the Assisted Voluntary Return and Reintegration of Migrants</a>
</h2>
<div class="mini-caption">
Assisted Voluntary Return and Reintegration (AVRR) is an indispensable part of a comprehensive approach to migration management aiming at orderly and humane return and reintegration of migrants.
</div>
<a href="/iom/comparative-research-assisted-voluntary-return-and-reintegration-migrants" class="button">More Details</a>
</div>
</div>
</div>
</div>
</div>
</div>
