https://capalgerie.dz/wp-content/themes/avenews/assets/js/headspace.js?ver=1.0.0

1(function (global, factory) {
2  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
3  typeof define === 'function' && define.amd ? define(factory) :
4  (global.Headspace = factory());
5}(this, function () { 'use strict';
6
7  function Headspace(element) {
8    var opts = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
9
10    if (!(this instanceof Headspace)) {
11      return new (Function.prototype.bind.apply(Headspace, [null].concat(Array.prototype.slice.call(arguments))))();
12    }
13
14    this.element = element;
15    this.startOffset = optionOrDefault(opts.startOffset, element && element.offsetHeight);
16    this.tolerance = optionOrDefault(opts.tolerance, 8);
17    this.showAtBottom = optionOrDefault(opts.showAtBottom, true);
18    this.classNames = opts.classNames || {
19      base: 'headspace',
20      fixed: 'headspace--fixed',
21      hidden: 'headspace--hidden'
22    };
23
24    this._scrollLast = 0;
25    if (typeof window !== 'undefined') {
26      this.init();
27    }
28  }
29
30  Headspace.prototype = {
31    init: function init() {
32      var _this = this;
33
34      this.addClass(this.classNames.base);
35      window.addEventListener('scroll', function () {
36        return _this.debounce(function () {
37          return handleScroll(_this);
38        });
39      });
40    },
41    reset: function reset() {
42      var classNames = this.classNames;
43      this.removeClass(classNames.fixed, classNames.hidden);
44    },
45    fix: function fix() {
46      var classNames = this.classNames;
47      this.addClass(classNames.fixed);
48      this.removeClass(classNames.hidden);
49    },
50    hide: function hide() {
51      this.addClass(this.classNames.hidden);
52    },
53
54    // Accessible for shimming
55    addClass: function addClass() {
56      var _element$classList;
57
58      (_element$classList = this.element.classList).add.apply(_element$classList, arguments);
59    },
60    removeClass: function removeClass() {
61      var _element$classList2;
62
63      (_element$classList2 = this.element.classList).remove.apply(_element$classList2, arguments);
64    },
65    debounce: function debounce(callback) {
66      window.requestAnimationFrame(callback);
67    }
68  };
69
70  Headspace.isSupported = function () {
71    return !!(typeof window !== 'undefined' && window.requestAnimationFrame && 'classList' in document.documentElement);
72  };
73
74  function optionOrDefault(opt, def) {
75    return typeof opt !== 'undefined' ? opt : def;
76  }
77
78  function handleScroll(instance) {
79    var scrollCurrent = window.pageYOffset;
80    var scrollLast = instance._scrollLast;
81
82    if (scrollCurrent <= 0) {
83      instance.reset();
84    } else if (instance.showAtBottom && window.innerHeight + scrollCurrent >= document.body.offsetHeight) {
85      instance.fix();
86    } else if (scrollCurrent > instance.startOffset && Math.abs(scrollCurrent - scrollLast) >= instance.tolerance) {
87      instance[scrollCurrent > scrollLast ? 'hide' : 'fix']();
88    }
89
90    instance._scrollLast = scrollCurrent;
91  }
92
93  return Headspace;
94
95}));