图片不会隐藏在滚动jQuery

你好，我正在一个项目上，我发现一个免费的小提琴使用codepen.io。在网站上，它完美的工作，当你去我为它制作的js小提琴时，有一个问题。当您向下滚动至主要内容时，主标题和框会显示在文字上方。有没有一种方法可以消除这种情况发生在原来的codepen上？图片不会隐藏在滚动jQuery

小提琴HERE

function EasyPeasyParallax() { 
 
\t scrollPos = $(this).scrollTop(); 
 
\t $('#banner').css({ 
 
\t \t 'background-position' : '50% ' + (-scrollPos/4)+"px" 
 
\t }); 
 
\t $('#bannertext').css({ 
 
\t \t 'margin-top': (scrollPos/4)+"px", 
 
\t \t 'opacity': 1-(scrollPos/250) 
 
\t }); 
 
} 
 
$(document).ready(function(){ 
 
\t $(window).scroll(function() { 
 
\t \t EasyPeasyParallax(); 
 
\t }); 
 
});

来源

2016-05-18 Nick

添加

background: #fff; 
    position: relative;

到＃内容元素。

实施例：https://jsfiddle.net/gu7dt5oz/1/

来源

2016-05-18 00:57:36 aperture

如果正确地记得z索引仅适用于定位的元素。

我加了“position：relative;” #content，#content p和#banner，它似乎工作。

html { 
    height: 100%; 
} 

body { 
    background: #FFF; 
    font: 400 1.5em/1.5 "Droid Serif", serif; 
    color: #111; 
    text-align: center; 
    height: 100%; 
} 

h1 { 
    font: 700 2.8em/1.2 "Droid Sans", sans-serif; 
} 

h2 { 
    font: 700 1.5em/1.5 "Droid Sans", sans-serif; 
    margin: 1em 0; 
} 

#banner { 
    background: url(http://f.cl.ly/items/1b2V08451N440W0H420K/bg.jpg) no-repeat fixed 50% 0; 
    background-size: cover; 
    color: #fff; 
    height: 100%; 
    margin-left: -7px; 
    margin-top: -8px; 
    width: 100%; 
    z-index: 1; 
    position:relative; 
} 

#bannertext { 
    width: 24em; 
    position: fixed; 
    top: 20%; 
    left: 50%; 
    border: .5em solid #fff; 
    margin-left: -12em; 
    padding: 2em 0; 
    z-index: 1; 
} 

#content { 
    max-width: 28em; 
    text-align: justify; 
    margin: 0 auto; 
    padding: 2em; 
    z-index: 10; 
    position:relative; 
} 

#content p { 
    margin: 0 0 2em; 
    z-index: 10; 
    position:relative; 
}

来源

2016-05-18 00:57:36 Phil

编织：http://kodeweave.sourceforge.net/editor/#dcbf9c586b0e798fce89be31c50e3950

注：zIndex仅适用于positioned元素。

我所做的只是告诉#content为position relative，它工作正常。

html, body { 
 
    height: 100%; 
 
} 
 

 
body { 
 
    background: #FFF; 
 
    font: 400 1.5em/1.5 "Droid Serif", serif; 
 
    color: #111; 
 
    text-align: center; 
 
} 
 

 
h1 { 
 
    font: 700 2.8em/1.2 "Droid Sans", sans-serif; 
 
} 
 
h2 { 
 
    font: 700 1.5em/1.5 "Droid Sans", sans-serif; 
 
    margin: 1em 0; 
 
} 
 

 
#banner { 
 
    background: url(http://f.cl.ly/items/1b2V08451N440W0H420K/bg.jpg) no-repeat fixed 50% 0; 
 
    background-size: cover; 
 
    color: #fff; 
 
    height: 100%; 
 
    margin-left: -7px; 
 
    margin-top: -8px; 
 
    width: 100%; 
 
    z-index: 1; 
 
} 
 
#bannertext { 
 
    width: 24em; 
 
    position: fixed; 
 
    top: 20%; 
 
    left: 50%; 
 
    border: .5em solid #fff; 
 
    margin-left: -12em; 
 
    padding: 2em 0; 
 
    z-index: 1; 
 
} 
 

 
#content { 
 
    position: relative; 
 
    max-width: 28em; 
 
    text-align: justify; 
 
    margin: 0 auto; 
 
    padding: 2em; 
 
    z-index: 10; 
 
} 
 
#content p { 
 
    margin: 0 0 2em; 
 
    z-index: 10; 
 
}

<div id="banner"> 
 
    <div id="bannertext"> 
 
    <h1>| EX |</h1> 
 
    <p>Get famous on twitter.</p> 
 
    </div> 
 
</div> 
 

 
<div id="content"> 
 
    <h2>EX</h2> 
 
    <br> 
 
    <br> 
 
    <br> 
 
    <h2>EX.</h2> 
 
    <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Proin pellentesque, est ut venenatis aliquam, lorem quam porttitor ligula, eget ultrices velit dui sed quam. Praesent vehicula placerat lectus. Nulla pede. Quisque a nulla quis massa pulvinar sagittis. Pellentesque neque massa, mattis vulputate, pellentesque nec, vehicula volutpat, purus. Proin pretium dui et nulla cursus eleifend. Aenean aliquam urna eget urna. Vestibulum euismod elit. Donec eget augue sit amet neque elementum pretium. Proin posuere lacus id lacus. Duis vel justo suscipit neque ornare iaculis.</p> 
 
    <p>Ut urna urna, rhoncus eget, vestibulum tempus, venenatis non, nunc. Nunc consequat quam in nulla. Praesent feugiat posuere orci. Sed ac ante. Mauris pellentesque massa vitae ante mattis bibendum. Quisque dapibus lectus eu eros. Nulla facilisi. Praesent hendrerit egestas erat. Suspendisse at velit. Quisque mollis feugiat est. Curabitur ut leo. Cras auctor semper augue. Pellentesque leo pede, tempus sed, ornare in, venenatis sed, nisl. Quisque est velit, eleifend vitae, mollis ac, adipiscing at, eros. Mauris velit. Etiam nec lorem. Vestibulum pellentesque ligula a velit. Maecenas felis metus, suscipit et, eleifend vel, accumsan vitae, magna. Phasellus ut justo vel magna congue laoreet.</p> 
 
</div>

来源

2016-05-18 01:05:48

只需使用最新版本的jQuery，它工作正常

小提琴：https://jsfiddle.net/gu7dt5oz/2/

<script src="https://code.jquery.com/jquery-2.2.3.min.js" 
integrity="sha256-a23g1Nt4dtEYOj7bR+vTu7+T8VP13humZFBJNIYoEJo=" 
crossorigin="anonymous"></script>

来源

2016-05-18 01:06:35

图片不会隐藏在滚动jQuery

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