我相信我的問題很容易解決。我想在我的標題變爲可見時應用淡入,當不可見時淡出。所以我不想那麼粗糙。我嘗試了header.removeClass('clearHeader').addClass("darkHeader").fadeIn(slow);
但這並沒有幫助我。我也嘗試在CSS中添加轉換,但這對我也沒有幫助。淡入javascript中切換類
的Javascript:
$(function() {
//caches a jQuery object containing the header element
var header = $(".clearHeader");
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 50) {
header.removeClass('clearHeader').addClass("darkHeader");
} else {
header.removeClass("darkHeader").addClass('clearHeader');
}
});
});
CSS:
header {
width:100%;
height: 70px;
position: fixed;
z-index:999;
background-color:#fff;
box-sizing:border-box;
}
header nav {
display:inline-block;
float:right;
line-height:70px;
}
header nav a {
margin-left: 25px;
font-weight: 700;
font-size: 18px;
}
header nav a:hover {
text-shadow:1px 1px 1px red;
}
.clearHeader{
display:none;
opacity:0;
width: 100%;
-webkit-transition:all 1s ease-in-out;
-moz-transition:all 1s ease-in-out;
-o-transition:all 1s ease-in-out;
-ms-transition:all 1s ease-in-out;
transition:all 1s ease-in-out;
}
.darkHeader {
display:visible;
opacity:1;
z-index:999;
}
它是空的codepen – brk
http://codepen.io/anon/pen/VjKbma – pHenomen