固定背景实现的背景滚动特效示例分享_javascript技巧

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了固定背景实现的背景滚动特效示例分享_javascript技巧，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含4206字，纯文字阅读大概需要7分钟。

内容图文

代码如下:

CSS

代码如下:

/* Set all parents to full height */ 
html, body, 
.container, 
.cbp-fbscroller, 
.cbp-fbscroller section { 
height: 100%; 
} 
/* The nav is fixed on the right side and we center it by translating it 50% 
(we don't know it's height so we can't use the negative margin trick) */ 
.cbp-fbscroller > nav { 
position: fixed; 
z-index: 9999; 
right: 100px; 
top: 50%; 
-webkit-transform: translateY(-50%); 
-moz-transform: translateY(-50%); 
-ms-transform: translateY(-50%); 
transform: translateY(-50%); 
} 
.cbp-fbscroller > nav a { 
display: block; 
position: relative; 
color: transparent; 
height: 50px; 
} 
.cbp-fbscroller > nav a:after { 
content: ''; 
position: absolute; 
width: 24px; 
height: 24px; 
border-radius: 50%; 
border: 4px solid #fff; 
} 
.cbp-fbscroller > nav a:hover:after { 
background: rgba(255,255,255,0.6); 
} 
.cbp-fbscroller > nav a.cbp-fbcurrent:after { 
background: #fff; 
} 
/* background-attachment does the trick */ 
.cbp-fbscroller section { 
position: relative; 
background-position: top center; 
background-repeat: no-repeat; 
background-size: cover; 
background-attachment: fixed; 
} 
#fbsection1 { 
background-image: url(../images/1.jpg); 
} 
#fbsection2 { 
background-image: url(../images/2.jpg); 
} 
#fbsection3 { 
background-image: url(../images/3.jpg); 
} 
#fbsection4 { 
background-image: url(../images/4.jpg); 
} 
#fbsection5 { 
background-image: url(../images/5.jpg); 
}

Javascript

代码如下:

/** 
* cbpFixedScrollLayout.js v1.0.0 
* http://www.codrops.com 
* 
* Licensed under the MIT license. 
* http://www.opensource.org/licenses/mit-license.php 
* 
* Copyright 2013, Codrops 
* http://www.codrops.com 
*/ 
var cbpFixedScrollLayout = (function() { 
// cache and initialize some values 
var config = { 
// the cbp-fbscroller′s sections 
$sections : $( '#cbp-fbscroller > section' ), 
// the navigation links 
$navlinks : $( '#cbp-fbscroller > nav:first > a' ), 
// index of current link / section 
currentLink : 0, 
// the body element 
$body : $( 'html, body' ), 
// the body animation speed 
animspeed : 650, 
// the body animation easing (jquery easing) 
animeasing : 'easeInOutExpo' 
}; 
function init() { 
// click on a navigation link: the body is scrolled to the position of the respective section 
config.$navlinks.on( 'click', function() { 
scrollAnim( config.$sections.eq( $( this ).index() ).offset().top ); 
return false; 
} ); 
// 2 waypoints defined: 
// First one when we scroll down: the current navigation link gets updated. 
// A `new section′ is reached when it occupies more than 70% of the viewport 
// Second one when we scroll up: the current navigation link gets updated. 
// A `new section′ is reached when it occupies more than 70% of the viewport 
config.$sections.waypoint( function( direction ) { 
if( direction === 'down' ) { changeNav( $( this ) ); } 
}, { offset: '30%' } ).waypoint( function( direction ) { 
if( direction === 'up' ) { changeNav( $( this ) ); } 
}, { offset: '-30%' } ); 
// on window resize: the body is scrolled to the position of the current section 
$( window ).on( 'debouncedresize', function() { 
scrollAnim( config.$sections.eq( config.currentLink ).offset().top ); 
} ); 
} 
// update the current navigation link 
function changeNav( $section ) { 
config.$navlinks.eq( config.currentLink ).removeClass( 'cbp-fbcurrent' ); 
config.currentLink = $section.index( 'section' ); 
config.$navlinks.eq( config.currentLink ).addClass( 'cbp-fbcurrent' ); 
} 
// function to scroll / animate the body 
function scrollAnim( top ) { 
config.$body.stop().animate( { scrollTop : top }, config.animspeed, config.animeasing ); 
} 
return { init : init }; 
})();

内容总结

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