Javascript 滚动后更改对象的颜色
我想做一个对象,可以改变颜色后滚动(向下)100px和改变回默认后滚动(向上)。我正在使用此代码,但不起作用 jQuery:Javascript 滚动后更改对象的颜色,javascript,jquery,html,Javascript,Jquery,Html,我想做一个对象,可以改变颜色后滚动(向下)100px和改变回默认后滚动(向上)。我正在使用此代码,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
$(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>
标题
我将此代码用于杆顶菜单
你可以为自己定制它,如果你不能说,那么我自己改变它,但如果你,你自己做会更好
<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>
$('.top-menu').addClass('original').clone().insertAfter('.top-menu').addClass('clone').css('position','fixed').css('top','0').css('margin-top','0').css('z-index','500').removeClass('original').hide();
scrollIntervalID=setInterval(stickIt,10);
功能套件(){
var orgementpos=$('.original').offset();
orgElementTop=orgElementPos.top;
如果($(窗口).scrollTop()>=(orgElementTop)){
orgElement=$('.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');
}否则{
$('.cloned').hide();
$('.original').css('visibility','visible');
}
}
给你:
$(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);
}
});
});
什么东西在这里不起作用?你们有什么地方做错了,或者你们不能做什么?为什么你们的表格在页眉?它应该在代码中,但它不起作用