jQuery css implements the page navigation effect of Baidu Encyclopedia_jquery
WBOYOriginal
2016-05-16 16:26:191337browse
I accidentally saw the page navigation effect of Baidu Encyclopedia this week. I thought it was quite good, so I took the time to write about it over the weekend.
The picture below is the rendering of the navigation part:
The css and images are copied from Baidu and can be downloaded from Baidu Encyclopedia.
<script><br>
var slideInnerHeight = $('#sideCatalog-catalog dl').height();<br>
var slideOutHeight = $('#sideCatalog-catalog').height();<br>
var enableTop = slideInnerHeight - slideOutHeight;<br>
var step = 50;<br>
//点击向上的按钮<br>
$('#sideCatalog-down').bind('click', function () {<br>
if ($(this).hasClass('sideCatalog-down-enable')) {<br>
if ((enableTop - Math.abs(parseInt($('#sideCatalog-catalog dl').css('top')))) > step) {<br>
$('#sideCatalog-catalog dl').stop().animate({'top': '-=' step}, 'fast');<br>
$('#sideCatalog-up').removeClass('sideCatalog-up-disable').addClass('sideCatalog-up-enable');<br>
} else {<br>
$('#sideCatalog-catalog dl').stop().animate({'top': -enableTop}, 'fast');<br>
$(this).removeClass('sideCatalog-down-enable').addClass('sideCatalog-down-disable');<br>
}<br>
} else {<br>
return false;<br>
}<br>
})<br>
//点击向下的按钮<br>
$('#sideCatalog-up').bind('click', function () {<br>
if ($(this).hasClass('sideCatalog-up-enable')) {<br>
if (Math.abs(parseInt($('#sideCatalog-catalog dl').css('top'))) > step) {<br>
$('#sideCatalog-catalog dl').stop().animate({'top': ' =' step}, 'fast');<br>
$('#sideCatalog-down').removeClass('sideCatalog-down-disable').addClass('sideCatalog-down-enable');<br>
} else {<br>
$('#sideCatalog-catalog dl').stop().animate({'top': '0'}, 'fast');<br>
$(this).removeClass('sideCatalog-up-enable').addClass('sideCatalog-up-disable');<br>
}<br>
} else {<br>
return false;<br>
}<br>
})</p>
<p> //点击导航中的各个目录<br>
$('#sideCatalog-catalog dl').delegate('dd', 'click', function (e) {<br>
var index = $(this).index();<br>
scrollSlide($(this), index);<br>
var ddId = $(this).find('a').stop().attr('href').substring(1);<br>
var windowTop = $('a[name="' ddId '"]').offset().top;<br>
$('body,html').animate({scrollTop: windowTop}, 'fast');<br>
$(this).addClass('heightlight').siblings('dd').removeClass('heightlight');<br>
})</p>
<p> //Scroll the page, that is, scroll with the scroll bar<br>
$(document).scroll(function () {<br>
var len = $('.headline-1').length;<br>
for (var i=len-1; i>=0; i--) {<br>
if ($(this).scrollTop() >= $('.headline-1').eq(i).offset().top - $('.headline-1').eq(i).height ()) {<br>
var index = i;<br>
$('#sideCatalog-catalog dl dd').eq(index).addClass('heightlight').siblings('dd').removeClass('heightlight');<br>
scrollSlide($('#sideCatalog-catalog dl dd').eq(index), index);<br>
return false;<br>
} else {<br>
$('#sideCatalog-catalog dl dd').eq(0).addClass('heightlight').siblings('dd').removeClass('heightlight');<br>
}<br>
}<br>
})</p>
<p> //Scrolling of navigation, and display and hiding of up and down buttons<br>
Function scrollSlide(that, index){<br>
If (index < 5) {<br />
$('#sideCatalog-catalog dl').stop().animate({'top': '0'}, 'fast');<br />
$('#sideCatalog-down').removeClass('sideCatalog-down-disable').addClass('sideCatalog-down-enable');<br />
$('#sideCatalog-up').removeClass('sideCatalog-up-enable').addClass('sideCatalog-up-disable');<br />
} else if (index > 11) {<br>
$('#sideCatalog-catalog dl').stop().animate({'top': -enableTop}, 'fast');<br>
$('#sideCatalog-down').removeClass('sideCatalog-down-enable').addClass('sideCatalog-down-disable');<br>
$('#sideCatalog-up').removeClass('sideCatalog-up-disable').addClass('sideCatalog-up-enable');<br>
} else {<br>
var dlTop = parseInt($('#sideCatalog-catalog dl').css('top')) slideOutHeight / 2 - (that.offset().top - $(document).scrollTop());<br>
$('#sideCatalog-catalog dl').stop().animate({'top': dlTop}, 'fast');<br>
$('#sideCatalog-down').removeClass('sideCatalog-down-disable').addClass('sideCatalog-down-enable');<br>
$('#sideCatalog-up').removeClass('sideCatalog-up-disable').addClass('sideCatalog-up-enable');<br>
}<br>
}<br>
</script>
The big website has the style of a big website. Many of the effects are produced and used first. Friends can go shopping often and find some good things easily
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