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Mini Shell
'use strict';
var scrolltotop = {
setting: {
startline: 100,
scrollto: 0,
scrollduration: 1000,
fadeduration: [500, 100]
},
controlHTML: '<img src="assets/images/k2.png" style="width:30px; height:30px" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
controlattrs: {
offsetx: 10,
offsety: 10
}, //offset of control relative to right/ bottom of window corner
anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
state: {
isvisible: false,
shouldvisible: false
},
scrollup: function() {
if (!this.cssfixedsupport) //if control is positioned using JavaScript
this.$control.css({
opacity: 0
}) //hide control immediately after clicking it
var dest = isNaN(this.setting.scrollto) ? this.setting.scrollto : parseInt(this.setting.scrollto)
if (typeof dest == "string" && jQuery('#' + dest).length == 1) //check element set by string exists
dest = jQuery('#' + dest).offset().top
else
dest = 0
this.$body.animate({
scrollTop: dest
}, this.setting.scrollduration);
},
keepfixed: function() {
var $window = jQuery(window)
var controlx = $window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
var controly = $window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
this.$control.css({
left: controlx + 'px',
top: controly + 'px'
})
},
togglecontrol: function() {
var scrolltop = jQuery(window).scrollTop()
if (!this.cssfixedsupport)
this.keepfixed()
this.state.shouldvisible = (scrolltop >= this.setting.startline) ? true : false
if (this.state.shouldvisible && !this.state.isvisible) {
this.$control.stop().animate({
opacity: 1
}, this.setting.fadeduration[0])
this.state.isvisible = true
} else if (this.state.shouldvisible == false && this.state.isvisible) {
this.$control.stop().animate({
opacity: 0
}, this.setting.fadeduration[1])
this.state.isvisible = false
}
},
init: function() {
jQuery(document).ready(function($) {
var mainobj = scrolltotop
var iebrws = document.all
mainobj.cssfixedsupport = !iebrws || iebrws && document.compatMode == "CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
mainobj.$body = (window.opera) ? (document.compatMode == "CSS1Compat" ? $('html') : $('body')) : $('html,body')
mainobj.$control = $('<div id="topcontrol">' + mainobj.controlHTML + '</div>')
.css({
position: mainobj.cssfixedsupport ? 'fixed' : 'absolute',
bottom: mainobj.controlattrs.offsety,
right: mainobj.controlattrs.offsetx,
opacity: 0,
cursor: 'pointer'
})
.attr({
title: 'Scroll Back to Top'
})
.on("click", function() {
mainobj.scrollup();
return false
}) // on("click", function() click(function()
.appendTo('body')
if (document.all && !window.XMLHttpRequest && mainobj.$control.text() != '') //loose check for IE6 and below, plus whether control contains any text
mainobj.$control.css({
width: mainobj.$control.width()
}) //IE6- seems to require an explicit width on a DIV containing text
mainobj.togglecontrol()
$('a[href="' + mainobj.anchorkeyword + '"]').on("click", function() {
mainobj.scrollup()
return false
})
$(window).on('scroll resize', function(e) {
mainobj.togglecontrol()
})
})
}
}
scrolltotop.init()
Zerion Mini Shell 1.0