[英]JavaScript menu hides when scrolling down, appears when stop
我有一個菜單,該菜單是正常的塊顯示div,因為上面還有一個帶有注釋的div。 我希望菜單在向下滾動時始終固定在頂部,但請立即將其隱藏。 這是因為,當用戶停止滾動時,它會出現;當用戶向上滾動時,它會再次隱藏;當停止-顯示時,向下滾動-隱藏等時,它會一直隱藏;而在沒有滾動時,它始終會顯示。
有人可以幫我嗎?
這是我的菜單代碼:
<div class="menu">
<div class="menu_tab">
<div class="wrapper">
<div class="obsah">
<div class="kolonky" id="strana">
<a href="./"><div class="logo"></div></a>
</div>
<div class="kolonky" id="stred">
<div class="rozbalit"><a href="obchod.php" id="srdce">Obchod</a>
<nav>
<a href="priprava_navod.php">Jak připravit matcha čaj</a>
<a href="jakaje.php">Jak vychutnat matcha čaj</a>
<a href="recepty.php">recepty</a>
</nav>
</div>
<div class="rozbalit"><a href="poznejte.php">poznejte matcha</a>
<nav>
<a href="priprava_navod.php">Jak připravit matcha čaj</a>
<a href="jakaje.php">Jak vychutnat matcha čaj</a>
<a href="recepty.php">recepty</a>
</nav>
</div>
<div class="rozbalit"><a href="priprava_navod.php">příprava</a>
<nav>
<a href="priprava_navod.php">Jak připravit matcha čaj</a>
<a href="jakaje.php">Jak vychutnat matcha čaj</a>
<a href="recepty.php">recepty</a>
</nav>
</div>
<a href="clanek.php">blog</a>
<a href="pribeh.php">o nás</a>
</div>
<div class="kolonky" id="strana">
<div id="uzivatel">
<a href="ucet.php" id="prihlaseni_otevri">Jaroslava B</a>
<nav class="uziv_info">
<a href="ucet.php">Moje objednávky</a>
<a href="ucet.php">Moje adresy</a>
<a href="ucet.php">nákupní košík</a>
<a href="#">odhlásit</a>
<a href="#">nastavení</a>
</nav>
</div>
<a href="#"><div class="kosik">
<span>15</span>
</div></a>
<span id="jazyky">CZ</span>
</div>
</div>
</div>
</div>
</div>
.hidden_scr{
display: none !important;
}
.menu{
width: 100%;
background: transparent;
transition-duration: 0.3s;
-webkit-transition: all 0.5s ease;
-moz-transition: all 0.5s ease;
-o-transition: all 0.5s ease;
transition: all 0.5s ease;
}
.menu.cloned{
background: rgba(255,255,255,0.8);
z-index: 5;
}
.menu_tab{
width: 60%;
margin: 0px auto;
padding: 20px 0px;
display: table;
text-align: center;
vertical-align: middle;
table-layout: fixed;
background: transparent;
}
.menu_wr{
display: inline-block;
margin-bottom: -5px;
}
.menu_wr.grey{
background: #edecf0;
}
.menu.grey.cloned{
background: rgba(255,255,255,0.8);
}
.menu .obsah{
display: table-row;
}
$('.menu').addClass('original').clone().insertAfter('.menu').addClass('cloned').css('position','fixed').css('top','0').css('margin-top','0').css('z-index','3').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).show();
$('.original').css('visibility','hidden');
} else {
$('.cloned').hide();
$('.original').css('visibility','visible');
}
}
var lastScrollTop = 0;
// element should be replaced with the actual target element on which you have applied scroll, use window in case of no target element.
window.addEventListener("scroll", function(){ // or window.addEventListener("scroll"....
var st = window.pageYOffset || document.documentElement.scrollTop; // Credits: "https://github.com/qeremy/so/blob/master/so.dom.js#L426"
if (st > lastScrollTop){
$('.menu.cloned').addClass("hidden_scr");
} else {
$('.menu.cloned').removeClass("hidden_scr");
}
lastScrollTop = st;
}, false);
完成:)
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('.menu').outerHeight();
$(window).scroll(function(event){
didScroll = true;
});
setInterval(function() {
if (didScroll) {
hasScrolled();
didScroll = false;
}else{
$('.menu').removeClass('nav-up').addClass('nav-down');
}
}, 250);
function hasScrolled() {
var st = $(this).scrollTop();
if(Math.abs(lastScrollTop - st) <= delta)
return;
if (st > lastScrollTop && st > navbarHeight){
$('.menu').removeClass('nav-down').addClass('nav-up');
} else {
if(st + $(window).height() < $(document).height()) {
$('.menu').removeClass('nav-down').addClass('nav-up');
}
}
lastScrollTop = st;
if(document.body.scrollTop === 0){
$(".nav-up").css("background", "transparent");
$(".nav-down").css("background", "transparent");
}else{
$(".nav-up").css("background", "rgba(255,255,255,0.9)");
$(".nav-down").css("background", "rgba(255,255,255,0.9)");
}
}
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