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[英]How can I create a function so that the content in a modal window scrolls to top when body prevents scroll?
[英]How can I scroll an element when page body scrolls?
我有一個固定的側導航,上面有一長串跳轉鏈接。 當用戶滾動主頁內容時,跳轉鏈接會突出顯示以顯示用戶在列表中的位置。
問題是固定側導航有溢出-y:滾動; 當鏈接突出顯示時,這實際上不會向上或向下滾動。
https://jsfiddle.net/nz6b7cj9/
HTML:
<div id="container">
<div style="float:left">
<div id="fixed-side-nav">
<ul>
<li><a href="link1" class="link1">Jump links</a></li>
<li><a href="link2" class="link2">Jump links</a></li>
<li><a href="link3" class="link3">Jump links</a></li>
<li><a href="link4" class="link4">Jump links</a></li>
<li><a href="link5" class="link5">Jump links</a></li>
<li><a href="link6" class="link6">Jump links</a></li>
<li><a href="link7" class="link7">Jump links</a></li>
<li><a href="link8" class="link8">Jump links</a></li>
<li><a href="link9" class="link9">Jump links</a></li>
<li><a href="link10" class="link10">Jump links</a></li>
<li><a href="link11" class="link11">Jump links</a></li>
<li><a href="link12" class="link12">Jump links</a></li>
<li><a href="link13" class="link13">Jump links</a></li>
<li><a href="link14" class="link14">Jump links</a></li>
<li><a href="link15" class="link15">Jump links</a></li>
<li><a href="link16" class="link16">Jump links</a></li>
<li><a href="link17" class="link17">Jump links</a></li>
<li><a href="link18" class="link18">Jump links</a></li>
<li><a href="link19" class="link19">Jump links</a></li>
</ul>
</div>
</div>
<div id="content" style="float:left">
<h2 id="link1">
HERE
</h2>
<p>Content here</p>
<h2 id="link2">
HERE
</h2>
<p>Content here</p>
<h2 id="link3">
HERE
</h2>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<h2 id="link4">
HERE
</h2>
<p>Content here</p>
<h2 id="link5">
HERE
</h2>
<p>Content here</p>
<h2 id="link5">
HERE
</h2>
<p>Content here</p>
<h2 id="link6">
HERE
</h2>
<p>Content here</p>
<h2 id="link7">
HERE
</h2>
<p>Content here</p>
<h2 id="link8">
HERE
</h2>
<p>Content here</p>
<h2 id="link9">
HERE
</h2>
<p>Content here</p>
<h2 id="link10">
HERE
</h2>
<p>Content here</p>
<h2 id="link11">
HERE
</h2>
<p>Content here</p>
<h2 id="link12">
HERE
</h2>
<p>Content here</p>
<h2 id="link13">
HERE
</h2>
<p>Content here</p>
<h2 id="link14">
HERE
</h2>
<p>Content here</p>
<h2 id="link15">
HERE
</h2>
<p>Content here</p>
<h2 id="link16">
HERE
</h2>
<p>Content here</p>
<h2 id="link17">
HERE
</h2>
<p>Content here</p>
<h2 id="link18">
HERE
</h2>
<p>Content here</p>
<h2 id="link19">
HERE
</h2>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
<p>Content here</p>
</div>
</div>
CSS:
body {
background: #20262E;
padding: 20px;
font-family: Helvetica;
position: relative;
}
#fixed-side-nav{
border:1px solid #ededed;
padding:10px;
width:12%;
background-color:#fff;
bottom:20px;
overflow-y:scroll;
bottom:20px;
position:fixed;
top:90px;
}
#content{
float:left;
margin-left:200px;
background-color:white;
width:100%;
}
#fixed-side-nav li.active {background-color:yellow}
jQuery:
jQuery(window).on('load scroll resize', function (){
// Assign active class to nav links while scrolling
var windowTop = jQuery(window).scrollTop();
jQuery('h2').each(function (index, elem) {
var offsetTop = jQuery(elem).offset().top;
var outerHeight = jQuery(this).outerHeight(true);
if( windowTop > (offsetTop - 110) && windowTop < ( offsetTop + outerHeight)) {
var elemId = jQuery(elem).attr('id');
jQuery('#fixed-side-nav li.active').removeClass('active');
jQuery('#fixed-side-nav a.'+elemId).parents('li').addClass('active');
}
});
});
有沒有辦法可以滾動固定側導航以顯示突出顯示的鏈接? 我想在不使用 focus() 的情況下執行此操作,因為這不利於可訪問性。
您可以使用Element.scrollIntoView() :
jQuery('#fixed-side-nav a.'+elemId).parents('li')[0].scrollIntoView(false);
(注意我們使用[0]
從 jQuery 對象中獲取元素)
此 function 還具有一些您可以使用的 animation 選項,請閱讀鏈接文檔。
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