如何在滚动上固定标题 [英] How to fix a header on scroll
问题描述
我创建一个标题,一旦滚动到一定量的像素,它修复并保持在原地。
I am creating a header that once scrolled to a certain amount of pixels it fixes and stays in place.
我可以使用css和html或者我需要jquery吗?
Can I do this using just css and html or do i need jquery too?
我创建了一个演示,以便您可以理解。任何帮助将是巨大的!
I have created a demo so you can understand. Any help would be great!
http://jsfiddle.net/gxRC9/ 4 /
body{
margin:0px;
padding:0px;
}
.clear{
clear:both;
}
.container{
height:2000px;
}
.cover-photo-container{
width:700px;
height: 348px;
margin-bottom: 20px;
background-color:red;
}
.small-box{
width:163px;
height:100px;
border:1px solid blue;
float:left;
}
.sticky-header{
width:700px;
height:50px;
background:orange;
postion:fixed;
}
推荐答案
滚动事件。最好的方法是为固定位置设置一个新的CSS类,当滚动超过某一点时,该类将被分配给相关的div。
You need some JS to do scroll events. The best way to do this is to set a new CSS class for the fixed position that will get assigned to the relevant div when scrolling goes past a certain point.
HTML
<div class="sticky"></div>
CSS
.fixed {
position: fixed;
top:0; left:0;
width: 100%; }
jQuery
$(window).scroll(function(){
var sticky = $('.sticky'),
scroll = $(window).scrollTop();
if (scroll >= 100) sticky.addClass('fixed');
else sticky.removeClass('fixed');
});
示例fiddle: http://jsfiddle.net/gxRC9/501/
编辑:扩展示例
如果触发点未知,但应该是当粘性元素到达屏幕顶部时, offset
可以使用。
If the trigger point is unknown but should be whenever the sticky element reaches the top of the screen, offset().top
can be used.
var stickyOffset = $('.sticky').offset().top;
$(window).scroll(function(){
var sticky = $('.sticky'),
scroll = $(window).scrollTop();
if (scroll >= stickyOffset) sticky.addClass('fixed');
else sticky.removeClass('fixed');
});
扩展示例fiddle: http://jsfiddle.net/gxRC9/502/
Extended example fiddle: http://jsfiddle.net/gxRC9/502/
这篇关于如何在滚动上固定标题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!