Apa beza Back To Top jQuery dengan yang biasa?
Pertama; sila lihat gambar di bawah ini untuk lihat perbezaan (klik untuk perbesarkan):
Perhatikan kotak yang bertanda merah. Ini sebelum kita skrol page ke bawah.
Kedua; cuba klik imej 'Back To Top' saya. Ia akan skrol secara smooth hingga ke paparan paling atas. Tidak seperti method 'Back To Top' yang biasa. Method 'smooth scroll' inilah yang dinamakan method jQuery.
Menarik, kan?
Bagaimana cara untuk memasangnya?
1 - Copy kod di bawah.
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script><script type="text/javascript" >var scrolltotop={ //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top). setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]}, controlHTML: '<img src="http://blog-host.googlecode.com/files/back_to_top.gif" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol" controlattrs: {offsetx:5, offsety:5}, //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=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>') .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'}) .attr({title:'Scroll Back to Top'}) .click(function(){mainobj.scrollup(); return false}) .appendTo('body') if (document.all && !window.XMLHttpRequest && mainobj.$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 +'"]').click(function(){ mainobj.scrollup() return false }) $(window).bind('scroll resize', function(e){ mainobj.togglecontrol() }) }) }}scrolltotop.init()</script>
6 - Klik butang 'Save' dan cuba preview blog anda.
Kini blog anda mempunyai jQuery Back To Top!
Selamat mencuba.