absolute | 易学教程

position:relative/static/fixed/absolute定位的区别以及使用场景

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absolute是相对于自己最近的父元素来定位的，relative是相对于自己来定位的 relative 不脱离文档流，absolute 脱离文档流。也就是说：relative 的元素尽管表面上看到它偏离了原来的位置，但它实际上在文档流中还是没变。absolute的元素不仅位置改变了，同时也脱离了文档流。所以absolute会把非定位盒子覆盖掉。 position:relative日常应用的时候一般是设置给position:absolute;的父层的,父层position:relative; 子层position:absolute;的话, 就是依照父层的边界进行定位的, 不然position:absolute 会逐层向上寻找设置了position:relative的元素边界, 直到body元素.. 这里还有一个文本流的概念。表现在float和relative的区别，relative既脱离文档流也脱离文本流，而float只是脱离了文档流。所以才会表现出，float元素会把非定位盒子覆盖掉，但不会覆盖非定位盒子里面的文本，因为没有脱离文本流，非定位盒子内的文本环绕在float的周围。而对于使用absolute元素，会把非定位和自的位置和开面的文本一起覆盖掉。使用场景; l Relative用法，经验案例：： 1．给absolute元素提供定位基准 2．

How to check if a path is absolute or relative

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UNIX absolute path starts with '/', whereas Windows starts with alphabet 'C:' or '\'. Does node.js has a standard multiplatform function to check if a path is absolute or relative ? chresse Since node version 0.12.0 you can use the path.isAbsolute(path) function from the path module. i.e: var path = require('path'); if(path.isAbsolute(myPath)) { //... } peoro As commented to dystroy's answer, the proposed solutions don't work if an absolute path is not already normalized (for example the path: ///a//..//b//./ ). A correct solution is: path.resolve(yourPath) === path.normalize(yourPath) As Marc

CSS z-index not working (position absolute)

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问题 I am trying to make the black div (relative) above the second yellow one (absolute). The black div 's parent has a position absolute, too. #relative { position: relative; width: 40px; height: 100px; background: #000; z-index: 1; margin-top: 30px; } .absolute { position: absolute; top: 0; left: 0; width: 200px; height: 50px; background: yellow; z-index: 0; } <div class="absolute"> <div id="relative"></div> </div> <div class="absolute" style="top: 54px"></div> Expected Result: 回答1: Remove z

Absolute positioned item in a flex container still gets considered as item in IE & Firefox

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If I have multiple elements with the property justify-content: space-between in a flex container and I want to absolute position one of them and remove from the flex flow, as showed here: This works in Chrome but not in IE and Firefox as the absolute positioned element is considered as 0 width, but still in the flex flow: Is there a fix to this keeping the layout as it is? CodePen It turns out that all it takes is three simple steps ( Demo ) 1). Set the left and right margin to auto on each child img { margin-left: auto; margin-right: auto; } 2). Set the left margin on the first child to 0 img

Problem with position absolute in ie7, div moves 10px to the right

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ive got a problem on my position absolute property on IE7. My div moves 10px to the right. Below is my code. IE8 and 9 works fine. id menu is the div Im referring. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <style type="text/css"> body{margin: 0 0 0 0; padding: 0 0 0 0;} #holder{width: 400px; height: 500px; margin: 0 auto;} #left{float: left; width: 50px; height: 500px; background-color: red;}

CSS Problem - Link (position:absolute) above a Box not work in IE + Opera

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I have a link in the bottom of a div-box, which have position:absolute and should overlay the whole div-box. like that: http://jsfiddle.net/UpwvT/4/ In FF and Webkit it works fine, but in IE + Opera the "some text" is still not a link and not clickable. Anybody an idea? :) thanx It looks like bug in Opera and IE. There is my hack for Opera and IE9. Add this for .link background-color: rgba(204,204,204,0.01); It is very transparent background. http://jsfiddle.net/UpwvT/19/ It doesn't work in IE8. Problem is solved - just add transparent background of link in css - for me work fine with

Alert says using deprecated HREF without absolute URL

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Message alert in Facebook developer page that my site is currently using the following deprecated features: Social Plugins (Like Button, Like Box) without absolute URL's in their href parameter. This must be fixed before July 2013. I'm guessing it's talking about the data-href parameter for likes, but my like buttons are being generated with the following simple code: data-href="http://<?php echo $_SERVER["HTTP_HOST"].$_SERVER["REQUEST_URI"];?>" And the results when viewed in the browser (looking at the HTML source) certainly look like absolute URLs to me. What is this alert actually trying to

Is there any way for “position:absolute” div to retain relative width?

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问题 Let's say I have two divs, one inside the other, like so: <html> <body> <div id="outer" style="width:50%"> <div id="inner" style="width:100%"> </div> </div> </body> </html> Right now, the inner div has a width of 100% of 50% of the screen size, or 50% of the screen size. If I were to change the inner div to position absolute, like this: <html> <body> <div id="outer" style="width:50%"> <div id="inner" style="position:absolute;width:100%"> </div> </div> </body> </html> In this case the inner

How To Create SubMenu in Drop Down (HTML/CSS)

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I just want create submenu in my drop down ... but I cant find code to fix this. HTML CODE : <nav id='menu'> <ul> <li><a class='home' href='/'>Home</a></li> <li><a class='prett' href='#' title='Menu'>Menu</a> <ul class='menus'> <li><a class='prett' href='Dropdown 1' title='Dropdown 1'>Dropdown 1 + Sub Menu</a> <ul class='submenu'> <li><a href="#" title="Sub Menu">Sub Menu</a></li> </ul> </li> <li><a href='#' title='Dropdown 2'>Dropdown 2</a></li> <li><a href='#' title='Dropdown 3'>Dropdown 3</a></li> </ul> </li> </ul> </nav> CSS CODE : #menu

Absolute url in jsp

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: While including css, js and images in my jsps I am facing a problem resolving relative urls. The urls get changed on refreshing the page or clicking the back button. I suppose one solution to the problem would be to include external files by using absolute urls. But I can't find out how to use a reference to the relative url and use it. Can anyone please help me on this? 回答1: Is this what you're looking for? ${pageContext.servletContext.contextPath} ... in your jsp: <link rel="stylesheet" href="${pageContext.servletContext.contextPath}/css