如何知道哪个 HTML 元素导致垂直滚动条
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How to Know Which HTML Element is Causing Vertical Scroll Bar
提问by Satya Prakash
I am learning Bootstrap. On the getting started menu, there are few templates given. I am playing with that. One example is about fixed Footer. I used nav from previous example and wanted to adjust that with fixed footer. But vertical scrollbar is coming. I am looking for element which is causing Vertical Scroll Bar.
我正在学习Bootstrap。在入门菜单上，给出的模板很少。我正在玩那个。一个例子是关于固定页脚。我使用了之前示例中的导航，并希望使用固定页脚对其进行调整。但是垂直滚动条来了。我正在寻找导致垂直滚动条的元素。
Here is HTML:
这是 HTML：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Bootstrap, from Twitter</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
<!-- Le styles -->
<link href="css/bootstrap.css" rel="stylesheet">
<style type="text/css">
/* Sticky footer styles
-------------------------------------------------- */
html,
body {
height: 100%;
/* The html and body elements cannot have any padding or margin. */
}
/* Wrapper for page content to push down footer */
#wrap {
min-height: 100%;
height: auto !important;
height: 100%;
/* Negative indent footer by it's height */
margin: 0 auto -60px;
}
/* Set the fixed height of the footer here */
#push,
#footer {
height: 60px;
}
#footer {
background-color: #f5f5f5;
}
/* Lastly, apply responsive CSS fixes as necessary */
@media (max-width: 767px) {
#footer {
margin-left: -20px;
margin-right: -20px;
padding-left: 20px;
padding-right: 20px;
}
}
/* Custom page CSS
-------------------------------------------------- */
/* Not required for template or sticky footer method. */
.container {
width: auto;
max-width: 680px;
height: auto;
}
.container .credit {
margin: 20px 0;
}
/* Adjust Nav */
#wrap > .container {
margin-top: 60px;
}
</style>
<link href="css/bootstrap-responsive.css" rel="stylesheet">
<!-- HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<script src="html5shiv.js"></script>
<![endif]-->
<!-- Fav and touch icons -->
<link rel="apple-touch-icon-precomposed" sizes="144x144" href="ico/apple-touch-icon-144-precomposed.png">
<link rel="apple-touch-icon-precomposed" sizes="114x114" href="ico/apple-touch-icon-114-precomposed.png">
<link rel="apple-touch-icon-precomposed" sizes="72x72" href="ico/apple-touch-icon-72-precomposed.png">
<link rel="apple-touch-icon-precomposed" href="ico/apple-touch-icon-57-precomposed.png">
<link rel="shortcut icon" href="ico/favicon.png">
</head>
<body>
<div id="wrap">
<div class="navbar navbar-inverse navbar-fixed-top" >
<div class="navbar-inner">
<div class="container">
<button type="button" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="brand" href="#">Project name</a>
<div class="nav-collapse collapse">
<ul class="nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</div>
</div>
<div class="container">
<h1>Bootstrap starter template</h1>
<p>Use this document as a way to quick start any new project.<br> All you get is this message and a barebones HTML document.</p>
</div> <!-- /container -->
<div id="push"></div>
</div> <!-- End Wrap -->
<div id="footer">
<div class="container">
<p class="muted credit">Example courtesy <a href="http://martinbean.co.uk">Martin Bean</a> and <a href="http://ryanfait.com/sticky-footer/">Ryan Fait</a>.</p>
</div>
</div>
<!-- Le javascript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="../jquery.js"></script>
<script src="js-ext/bootstrap-transition.js"></script>
<script src="js-ext/bootstrap-alert.js"></script>
<script src="js-ext/bootstrap-modal.js"></script>
<script src="js-ext/bootstrap-dropdown.js"></script>
<script src="js-ext/bootstrap-scrollspy.js"></script>
<script src="js-ext/bootstrap-tab.js"></script>
<script src="js-ext/bootstrap-tooltip.js"></script>
<script src="js-ext/bootstrap-popover.js"></script>
<script src="js-ext/bootstrap-button.js"></script>
<script src="js-ext/bootstrap-collapse.js"></script>
<script src="js-ext/bootstrap-carousel.js"></script>
<script src="js-ext/bootstrap-typeahead.js"></script>
</body>
</html>
Is there any trick, which works in these cases to know which Element is causing Scroll Bar?I faced similar problem earlier, I do not remember if I could find the easy solution.
有什么技巧可以在这些情况下知道哪个元素导致滚动条？我之前遇到过类似的问题，我不记得是否能找到简单的解决方案。
采纳答案by Satya Prakash
Ok, I got that if I change from margin-topto padding-topfor container to adjust for nav then problem is solved. I reached to the solution after deleting elements in Firebug. So, quick fix problem is solved but my questions are still open.
好的，我明白了，如果我将容器从margin-top更改为padding-top以调整导航，那么问题就解决了。在 Firebug 中删除元素后，我找到了解决方案。因此，快速修复问题已解决，但我的问题仍然存在。
How to know which element is causing scroll bar? Any trick?
如何知道哪个元素导致滚动条？有什么技巧吗？
Also, why margin-top is not working but padding-top has worked?
另外，为什么 margin-top 不起作用但 padding-top 起作用了？
To make clear where I made change, I am adding the modified CSS:
为了弄清楚我在哪里进行了更改，我添加了修改后的 CSS：
/* Adjust Nav */
#wrap > .container {
padding-top: 60px;
}
回答by Jeffpowrs
Add:
添加：
* {
outline: 1px solid red;
}
Then when you scroll down you should see one really tall box. Right click on it and select inspect element. That should give you the information you need.
然后当您向下滚动时，您应该会看到一个非常高的框。右键单击它并选择检查元素。这应该给你你需要的信息。
UPDATE:
更新：
Here is a nifty chrome plugin that can do that for you : http://pesticide.io/
这是一个漂亮的 chrome 插件，可以为您做到这一点：http: //pesticide.io/
回答by Mosijava
There is an excellent articleby Chris Coyier which explain everything you need about this problem.
Chris Coyier撰写了一篇出色的文章，其中解释了有关此问题的所有信息。
after reading this article, I personally use this code in my console to find out which element cause vertical scroll:
看完这篇文章后，我个人在我的控制台中使用这段代码来找出导致垂直滚动的元素：
press F12in your Browser then choose consoleand copy paste this code there and press enter
F12在浏览器中按然后选择console并复制粘贴此代码，然后按 Enter
var all = document.getElementsByTagName("*"), i = 0, rect, docWidth = document.documentElement.offsetWidth;
for (; i < all.length; i++) {
rect = all[i].getBoundingClientRect();
if (rect.right > docWidth || rect.left < 0){
console.log(all[i]);
all[i].style.border = '1px solid red';
}
}
Update:
it might be an element inside an iframe make page to vertically scroll.
in this case you should check every suspected iframe with this code:
更新：
它可能是 iframe 中的一个元素，使页面垂直滚动。在这种情况下，您应该使用以下代码检查每个可疑的 iframe：
var frame = document.getElementsByTagName("iframe");
frame = frame[0];
frame = (frame.contentWindow || frame.contentDocument);
var all = frame.document.getElementsByTagName("*"), i = 0, rect, docWidth = document.documentElement.offsetWidth;
for (; i < all.length; i++) {
rect = all[i].getBoundingClientRect();
if (rect.right > docWidth || rect.left < 0){
console.log(all[i]);
all[i].style.border = '1px solid red';
}
}
回答by zhirzh
I'd say you should use document.scrollingElement.
我会说你应该使用document.scrollingElement.
回答by lcharbon
Paste the below in the console and scroll. It will log the culprit in the console.
将以下内容粘贴到控制台中并滚动。它将在控制台中记录罪魁祸首。
function findScroller(element) {
element.onscroll = function() { console.log(element)}
Array.from(element.children).forEach(findScroller);
}
findScroller(document.body);
回答by Satbir Kira
I find it's usually an image without a max-width: 100%
我发现它通常是没有最大宽度的图像：100%
回答by Blaise
Use some browser debugging tool. Hit F12to open it and check the dom elements. You'll be able to find it.
使用一些浏览器调试工具。点击F12打开它并检查 dom 元素。您将能够找到它。
