[英]Change an objects color after scrolling
我想要一個對象,它可以在滾動(向下)100px 后更改顏色,並在向后滾動(向上)后更改回默認值。 我正在使用此代碼但不起作用
jQuery:
$(window).scroll(function() {
//After scrolling 100px from the top...
if ( $(window).scrollTop() >= 100 ) {
$('#menu').css('background', '#fff');
//Otherwise remove inline styles and thereby revert to original stying
} else {
$('#menu').removeAttr('style');
}
});
和我的 html:
<body>
<table>
<tr>
<td id="menu" class="title">
TITLE
</td>
<td style="width:40px;">
<div class=" ico">
<img src="search.svg" alt="search" style="width: 25px;" />
</div>
</td>
<td style="width: 40px;">
<div class=" ico">
<img src="menu.svg" alt="search" style="width: 25px;"/>
</div>
</td>
</tr>
</table>
</body>
干得好 :
$(function(){
var navColors = ['red', 'blue'];
var changeNavState = function(nav, newStateIndex) {
nav.data('state', newStateIndex).stop().css({
backgroundColor : navColors[newStateIndex]
});
};
var boolToStateIndex = function(bool) {
return bool * 1;
};
var maybeChangeNavState = function(nav, condState) {
var navState = nav.data('state');
if (navState === condState) {
changeNavState(nav, boolToStateIndex(!navState));
}
};
$('#header_nav').data('state', 1);
$(window).scroll(function(){
var $nav = $('#header_nav');
if ($(document).scrollTop() > 100) {
maybeChangeNavState($nav, 1);
} else {
maybeChangeNavState($nav, 0);
}
});
});
我正在將此代碼用於棒頂菜單,您可以為自己自定義它,如果您不能說,那么我自己更改它,但是如果您自己做會更好
<script>
$('.top-menu').addClass('original').clone().insertAfter('.top-menu').addClass('cloned').css('position','fixed').css('top','0').css('margin-top','0').css('z-index','500').removeClass('original').hide();
scrollIntervalID = setInterval(stickIt, 10);
function stickIt() {
var orgElementPos = $('.original').offset();
orgElementTop = orgElementPos.top;
if ($(window).scrollTop() >= (orgElementTop)) {
orgElement = $('.original');
coordsOrgElement = orgElement.offset();
leftOrgElement = coordsOrgElement.left;
widthOrgElement = orgElement.css('width');
$('.cloned').css('left',leftOrgElement+'px').css('top',0).css('width',widthOrgElement+'px').show();
$('.original').css('visibility','hidden');
} else {
$('.cloned').hide();
$('.original').css('visibility','visible');
}
}
</script>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.