单击按钮滚动到特定的 div [英] click button scroll to specific div
问题描述
我有一个带有固定菜单和内容框 (div) 的页面.单击菜单时,内容框滚动到特定 div.
到目前为止一切顺利.
这是这里的示例.https://jsfiddle.net/ezrinn/8cdjsmb9/11/
问题是当我将整个 div 包装起来,并将它们设置为显示/隐藏切换按钮时,滚动不起作用.
这是不起作用的示例.https://jsfiddle.net/ezrinn/8cdjsmb9/10/
这里还有一个片段
$('.btn').click(function() {$(".wrap").toggleClass('on');});var div_parent_class_name;var divs_class;var id_offset_map = {};$(document).ready(function() {div_parent_class_name = "wrap_scroll";divs_class = "页面部分";var scroll_divs = $("." + div_parent_class_name).children();id_offset_map.first = 0;scroll_divs.each(函数(索引){id_offset_map["#" + scroll_divs[index].id] = scroll_divs[index].offsetTop});$('a').bind('click', function(e) {e.preventDefault();var target = $(this).attr("href")$('.wrap_scroll').stop().animate({滚动顶部:id_offset_map[目标]}, 600, 函数() {/* location.hash = target-20;*///将哈希(#jumptarget)附加到pageurl});返回假;});});$(".wrap_scroll").scroll(function() {var scrollPos = $(".wrap_scroll").scrollTop();$("." + divs_class).each(function(i) {var divs = $("." + divs_class);divs.each(function(idx) {if (scrollPos >= id_offset_map["#" + this.id]) {$('.menu>ul>li a.active').removeClass('active');$('.menu>ul>li a').eq(idx).addClass('active');}});});}).scroll();
body,html {边距:0;填充:0;高度:3000px;}.wrap { 显示:无;}.wrap.on { 显示:块;}.菜单 {宽度:100px;位置:固定;顶部:40px;左:10px;}.menu a.active {背景:红色}.wrap_scroll {位置:绝对;顶部:20px;左:150px;宽度:500px;高度:500px;溢出-y:滚动}#家 {背景颜色:#286090;高度:200px;}#文件夹 {背景:灰色;高度:600px;}#关于 {背景颜色:蓝色;高度:800px;}#接触 {背景:黄色;高度:1000px;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><button class="btn">显示/隐藏</button><div class="wrap"><div class="菜单"><ul><li><a class="active" href="#home">Home</a><li><a href="#portfolio">作品集</a><li><a href="#about">关于</a><li><a href="#contact">联系方式</a></ul>a
<div class="wrap_scroll"><div class="page-section" id="home">hh</div><div class="page-section" id="portfolio">pp</div><div class="page-section" id="about">aa</div><div class="page-section" id="contact">cc</div>
我需要什么来修复代码?请帮忙.
当你计算你的 offset
时,div
hidden
与 <代码>显示:无代码>.这导致偏移被设置/计算为零.
这是我整理的一个快速解决方案:https://jsfiddle.net/hrb58zae/>
基本上,移动逻辑以确定单击显示/隐藏后的偏移量.
var setOffset = null;...如果(!setOffset){var scroll_divs = $("." + div_parent_class_name).children();id_offset_map.first = 0;scroll_divs.each(函数(索引){id_offset_map["#" + scroll_divs[index].id] = scroll_divs[index].offsetTop});setOffset = 真;}
I have a page that has a fixed menu and content box(div). When click the menu, content box scroll to specific div.
So far so good.
This is the sample here. https://jsfiddle.net/ezrinn/8cdjsmb9/11/
The problem is when I wrap this whole div and, make them as show/hide toggle button, the scroll is not working.
This is the sample that not working. https://jsfiddle.net/ezrinn/8cdjsmb9/10/
Also here is the snippet
$('.btn').click(function() {
$(".wrap").toggleClass('on');
});
var div_parent_class_name;
var divs_class;
var id_offset_map = {};
$(document).ready(function() {
div_parent_class_name = "wrap_scroll";
divs_class = "page-section";
var scroll_divs = $("." + div_parent_class_name).children();
id_offset_map.first = 0;
scroll_divs.each(function(index) {
id_offset_map["#" + scroll_divs[index].id] = scroll_divs[index].offsetTop
});
$('a').bind('click', function(e) {
e.preventDefault();
var target = $(this).attr("href")
$('.wrap_scroll').stop().animate({
scrollTop: id_offset_map[target]
}, 600, function() {
/* location.hash = target-20; */ //attach the hash (#jumptarget) to the pageurl
});
return false;
});
});
$(".wrap_scroll").scroll(function() {
var scrollPos = $(".wrap_scroll").scrollTop();
$("." + divs_class).each(function(i) {
var divs = $("." + divs_class);
divs.each(function(idx) {
if (scrollPos >= id_offset_map["#" + this.id]) {
$('.menu>ul>li a.active').removeClass('active');
$('.menu>ul>li a').eq(idx).addClass('active');
}
});
});
}).scroll();
body,
html {
margin: 0;
padding: 0;
height: 3000px;
}
.wrap { display:none;}
.wrap.on { display:block;}
.menu {
width: 100px;
position: fixed;
top: 40px;
left: 10px;
}
.menu a.active {
background: red
}
.wrap_scroll {
position: absolute;
top: 20px;
left: 150px;
width: 500px;
height: 500px;
overflow-y: scroll
}
#home {
background-color: #286090;
height: 200px;
}
#portfolio {
background: gray;
height: 600px;
}
#about {
background-color: blue;
height: 800px;
}
#contact {
background: yellow;
height: 1000px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button class="btn">show/hide</button>
<div class="wrap">
<div class="menu">
<ul>
<li><a class="active" href="#home">Home</a> </li>
<li><a href="#portfolio">Portfolio</a> </li>
<li><a href="#about">About</a> </li>
<li><a href="#contact">Contact</a> </li>
</ul>a
</div>
<div class="wrap_scroll">
<div class="page-section" id="home">hh</div>
<div class="page-section" id="portfolio">pp</div>
<div class="page-section" id="about">aa</div>
<div class="page-section" id="contact">cc</div>
</div>
</div>
What Do I need to fix the code? please help.
When you calculate your offset
, the div
is hidden
with display: none
. This results in the offsets being set/calculated to zero.
Here's a quick fix I threw together: https://jsfiddle.net/hrb58zae/
Basically, moved the logic to determine offset after clicking show/hide.
var setOffset = null;
...
if (!setOffset) {
var scroll_divs = $("." + div_parent_class_name).children();
id_offset_map.first = 0;
scroll_divs.each(function(index) {
id_offset_map["#" + scroll_divs[index].id] = scroll_divs[index].offsetTop
});
setOffset = true;
}
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