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objectful.js
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objectful.js
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(function (document) {
const prototype = {
init: function () {
this.currentSlide = 0;
this.currentStory = 0;
this.stories = document.querySelectorAll('.story');
this.story = this.stories[this.currentStory].querySelectorAll('.slide');
this.enableKeying();
},
_nextSlide: function(){
this.story[this.currentSlide].className = 'slide';
this.currentSlide = (this.currentSlide+1)%this.story.length;
this.story[this.currentSlide].className = 'slide showing';
},
_previousSlide: function(){
this.story[this.currentSlide].className = 'slide';
this.currentSlide = (this.currentSlide+(this.story.length-1))%this.story.length;
this.story[this.currentSlide].className = 'slide showing';
},
_getStory: function(){
return this.story = this.stories[this.currentStory].querySelectorAll('.slide');
},
_upStory: function(){
this.story[this.currentSlide].className = 'slide';
this.currentStory = (this.currentStory+(this.stories.length-1))%this.stories.length;
this._getStory()[this.currentSlide].className = 'slide showing';
},
_downStory: function(){
this.story[this.currentSlide].className = 'slide';
this.currentStory = (this.currentStory+1)%this.stories.length;
this._getStory()[this.currentSlide].className = 'slide showing';
},
enableKeying: function() {
document.onkeydown = (function(e) {
key = e.keyCode || e.which;
if (key === 39) {this._nextSlide()}
else if (key === 37) {this._previousSlide()}
else if (key === 38) {this._upStory()}
else if (key === 40) {this._downStory()}
}).bind(this);
},
};
const slideshow = Object.create(prototype);
document.addEventListener("DOMContentLoaded", slideshow.init());
})(document);