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Sticky Sideabr With Vanilla Javascript. Detects scroll and set fixed the element. Live example: http://codepen.io/javiarques/pen/vKdgjR
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// Sticky Nav Component | |
var Sticky = (function() { | |
'use strict'; | |
var CSS_CLASS_ACTIVE = 'is-fixed'; | |
var Sticky = { | |
element: null, | |
position: 0, | |
addEvents: function() { | |
window.addEventListener('scroll', this.onScroll.bind(this)); | |
}, | |
init: function(element) { | |
this.element = element; | |
this.addEvents(); | |
this.position = element.offsetTop ; | |
this.onScroll(); | |
}, | |
aboveScroll: function() { | |
return this.position < window.scrollY; | |
}, | |
onScroll: function(event) { | |
if (this.aboveScroll()) { | |
this.setFixed(); | |
} else { | |
this.setStatic(); | |
} | |
}, | |
setFixed: function() { | |
this.element.classList.add(CSS_CLASS_ACTIVE); | |
// not needed if added with CSS Class | |
this.element.style.position = 'fixed'; | |
this.element.style.top = 0; | |
}, | |
setStatic: function() { | |
this.element.classList.remove(CSS_CLASS_ACTIVE); | |
// not needed if added with CSS Class | |
this.element.style.position = 'static'; | |
this.element.style.top = 'auto'; | |
} | |
}; | |
return Sticky; | |
})(); | |
// Init Sticky | |
var sticky = document.querySelector('.sticky'); | |
if (sticky) | |
Sticky.init(sticky); |
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