jQuery 滚动时将菜单栏固定在顶部
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Leave menu bar fixed on top when scrolled
提问by Wilson
I've seen some websites that when the user scrolls down the page a box would pop-up to the right or left...
我见过一些网站，当用户向下滚动页面时，会在右侧或左侧弹出一个框...
Also, noticed this template: http://www.mvpthemes.com/maxmag/the designer does a nice job leaving the nav bar fixed on top.
另外，注意到这个模板：http: //www.mvpthemes.com/maxmag/设计师做得很好，将导航栏固定在顶部。
Now, how are these done? I guess it uses jquery to get the position of the page and to show the box.
现在，这些是如何完成的？我猜它使用 jquery 来获取页面的位置并显示框。
Can you please guide me to where I can find a snippet so I can learn to do something like that.
能否请您指导我到哪里可以找到片段，以便我可以学习做类似的事情。
回答by adamb
This effect is typically achieved by having some jquery logic as follows:
这种效果通常是通过一些 jquery 逻辑来实现的，如下所示：
$(window).bind('scroll', function () {
if ($(window).scrollTop() > 50) {
$('.menu').addClass('fixed');
} else {
$('.menu').removeClass('fixed');
}
});
This says once the window has scrolled past a certain number of vertical pixels, it adds a class to the menu that changes it's position value to "fixed".
这表示一旦窗口滚动超过一定数量的垂直像素，它会向菜单添加一个类，将其位置值更改为“固定”。
For complete implementation details see: http://jsfiddle.net/adamb/F4BmP/
完整的实现细节见：http: //jsfiddle.net/adamb/F4BmP/
回答by Tomas Gonzalez
In this example, you may show your menu centered.
在本例中，您可以将菜单居中显示。
HTML
HTML
<div id="main-menu-container">
<div id="main-menu">
//your menu
</div>
</div>
CSS
CSS
.f-nav{ /* To fix main menu container */
z-index: 9999;
position: fixed;
left: 0;
top: 0;
width: 100%;
}
#main-menu-container {
text-align: center; /* Assuming your main layout is centered */
}
#main-menu {
display: inline-block;
width: 1024px; /* Your menu's width */
}
JS
JS
$("document").ready(function($){
var nav = $('#main-menu-container');
$(window).scroll(function () {
if ($(this).scrollTop() > 125) {
nav.addClass("f-nav");
} else {
nav.removeClass("f-nav");
}
});
});
回答by mariosm
same as adamb but I would add a dynamic variable num
与 adamb 相同，但我会添加一个动态变量 num
num = $('.menuFlotante').offset().top;
to get the exact offset or position inside the window to avoid finding the right position.
获取窗口内的确切偏移量或位置以避免找到正确的位置。
$(window).bind('scroll', function() {
if ($(window).scrollTop() > num) {
$('.menu').addClass('fixed');
}
else {
num = $('.menuFlotante').offset().top;
$('.menu').removeClass('fixed');
}
});
回答by LGreen
You can also use css rules:
您还可以使用 css 规则：
position: fixed ;and top: 0px ;
position: fixed ;和 top: 0px ;
on your menu tag.
在您的菜单标签上。
回答by Bilal Iqbal
Or do this in more dynamic way
或者以更动态的方式执行此操作
$(window).bind('scroll', function () {
var menu = $('.menu');
if ($(window).scrollTop() > menu.offset().top) {
menu.addClass('fixed');
} else {
menu.removeClass('fixed');
}
});
In CSS add class
在 CSS 添加类
.fixed {
position: fixed;
top: 0;
}
回答by Thoman
try with sticky jquery plugin
尝试使用粘性 jquery 插件
https://github.com/garand/sticky
https://github.com/garand/sticky
<script src="jquery.js"></script>
<script src="jquery.sticky.js"></script>
<script>
$(document).ready(function(){
$("#sticker").sticky({topSpacing:0});
});
</script>回答by Athmane
you may want to add:
您可能想要添加：
$(window).trigger('scroll')
to trigger the scroll event when you reload an already scrolled page. Otherwise you might get your menu out of position.
当您重新加载已经滚动的页面时触发滚动事件。否则，您可能会使菜单错位。
$(document).ready(function(){
$(window).trigger('scroll');
$(window).bind('scroll', function () {
var pixels = 600; //number of pixels before modifying styles
if ($(window).scrollTop() > pixels) {
$('header').addClass('fixed');
} else {
$('header').removeClass('fixed');
}
});
});
回答by Athmane
check the link below, it has the html, css, JS and a live demo :) enjoy
检查下面的链接，它有 html、css、JS 和一个现场演示:) 享受
http://codepen.io/senff/pen/ayGvD
http://codepen.io/senff/pen/ayGvD
// Create a clone of the menu, right next to original.
$('.menu').addClass('original').clone().insertAfter('.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)) {
// scrolled past the original position; now only show the cloned, sticky element.
// Cloned element should always have same left position and width as original element.
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 {
// not scrolled past the menu; only show the original menu.
$('.cloned').hide();
$('.original').css('visibility','visible');
}
}* {font-family:arial; margin:0; padding:0;}
.logo {font-size:40px; font-weight:bold;color:#00a; font-style:italic;}
.intro {color:#777; font-style:italic; margin:10px 0;}
.menu {background:#00a; color:#fff; height:40px; line-height:40px;letter-spacing:1px; width:100%;}
.content {margin-top:10px;}
.menu-padding {padding-top:40px;}
.content {padding:10px;}
.content p {margin-bottom:20px;}<div class="intro">Some tagline goes here</div>回答by manzoor
This is jquery code which is used to fixed the div when it touch a top of browser hope it will help a lot.
这是 jquery 代码，用于在触摸浏览器顶部时修复 div 希望它会有所帮助。
<script type='text/javascript' src='http://code.jquery.com/jquery-1.7.1.js'></script>
<script type='text/javascript'>//<![CDATA[
$(window).load(function(){
$(function() {
$.fn.scrollBottom = function() {
return $(document).height() - this.scrollTop() - this.height();
};
var $el = $('#sidebar>div');
var $window = $(window);
var top = $el.parent().position().top;
$window.bind("scroll resize", function() {
var gap = $window.height() - $el.height() - 10;
var visibleFoot = 172 - $window.scrollBottom();
var scrollTop = $window.scrollTop()
if (scrollTop < top + 10) {
$el.css({
top: (top - scrollTop) + "px",
bottom: "auto"
});
} else if (visibleFoot > gap) {
$el.css({
top: "auto",
bottom: visibleFoot + "px"
});
} else {
$el.css({
top: 0,
bottom: "auto"
});
}
}).scroll();
});
});//]]>
</script>
回答by Sumit patel
$(window).scroll(function () {
var ControlDivTop = $('#cs_controlDivFix');
$(window).scroll(function () {
if ($(this).scrollTop() > 50) {
ControlDivTop.stop().animate({ 'top': ($(this).scrollTop() - 62) + "px" }, 600);
} else {
ControlDivTop.stop().animate({ 'top': ($(this).scrollTop()) + "px" },600);
}
});
});
