z-index | 易学教程

Difference between auto, 0, and no z-index?

阅读更多关于 Difference between auto, 0, and no z-index?

问题 What is the difference between: z-index: auto z-index: 0 no z-index at all All the above scenarios are for a div that encloses two div s, div1 and div2 each having a z-index which is 9 and 10 respectively. The enclosing div is in the stacking context of HTML. 回答1: Not specifying z-index is the same as z-index: auto ; that is its initial value. auto and 0 mean the same thing if your element doesn't create its own stacking context; e.g. it is not positioned as relative, absolute or fixed. If

Stack a relative DIV on an absolute DIV

阅读更多关于 Stack a relative DIV on an absolute DIV

问题 As I try to solve the problem that led to this my unsolved unsolved question, I decided to bring up the Green DIV to the front since the content doesn't bleed off of it. Structure Green paper: Main DIV.rack Orange and Gray paper: inserted via CSS :before and :after HTML <div class="rack"> Content </div> CSS .rack { width: 70%; height: 100%; background: #7FAE68; margin: 155px 0 100px 0; position: relative; float: left; left: 15%; z-index: 9999; transform:rotate(1deg); -ms

Stack a relative DIV on an absolute DIV

阅读更多关于 Stack a relative DIV on an absolute DIV

How to find the highest z-index within a document no matter what tags they are?

阅读更多关于 How to find the highest z-index within a document no matter what tags they are?

问题 How can I find the highest z-index within a document no matter what tags they are? I found this code but I tested it and it does not work, //include jQuery.js -- visit: http://jquery.com/ $(function(){ var maxZ = Math.max.apply(null,$.map($('body > *'), function(e,n){ if($(e).css('position')=='absolute') return parseInt($(e).css('z-index'))||1 ; }) ); alert(maxZ); }); Any better approach to do this? EDIT: It seems to work if I change the code to this, $('body *') $('body > *') --> is for div

web页面响应布局

阅读更多关于 web页面响应布局

原文 by zhangxinxu from http://www.zhangxinxu.com 我一直有一个想法就是把张鑫旭的所有文章弄到我的博客园上，但是想法一直存在，一直都在，行动越迟迟不肯配合，有那么一句话，没有行动的计划只会毁了你，亲，我不想给自己计划了，随心所遇吧，附一张图，激励我自己，也激励那些跟我一样的人。固定布局就是个屎，我要投奔流体布局！如果你一直都是流体布局的，自己心里也默念三遍：流体布局就是个屎，我要投奔固定布局！如果你固定/流体布局兼修，自己心里也默念三遍：什么固定/流体布局都是屎，我要投奔时髦的响应布局！看到张鑫旭这句话时，我就没放在心上，想着在响应布局早着呢，难维护，兼容又差，现在没想到，已经迫在眉睫，赶紧恶补下以下内容你可以直接到张鑫旭的博客上看，顶部有博客链接，底部有具体本章链接，他本人写的简单易懂还实用并且幽默附有dome等等，我自己的纯属于练文采，做笔记用响应式不句就是根据窗口的大小做相应的布局应运而生的web页面响应布局 zxx的做法是在连入css的就把不同宽度的局部放在不同的css中 <link rel="stylesheet" type="text/css" href="normalScreen.css" media="screen and (max-width: 1024px)" /> <link rel=

Layering images in CSS - possible to put 2 images in same element?

阅读更多关于 Layering images in CSS - possible to put 2 images in same element?

问题 Supposing I'm setting a background image for a web page in CSS like this: body { font-size: 62.5%; /* Resets 1em to 10px */ font-family: Verdana, Arial, Sans-Serif; background-color: #9D5922; color: #000; margin-left: auto; margin-right: auto; margin: 0; padding: 0; background: url(images/desk.gif) repeat bottom left; } Is there any way to layer a second image on top of the desk.gif within the body element itself, or is the only way to create a separate class and use the z axis? Sorry, it's a

How to position a parent div on top of its child?

阅读更多关于 How to position a parent div on top of its child?

问题 I have a container div and it has background-color: red; . There are about 12 children to this container, and the last child has background-color: blue; . I tried to move the container to top of the child with background-color: blue . I used a higher z-index for the container but it is still behind the child. .no1 { width: 800px; height: 300px; background-color: red; position: relative; z-index: 999; } .no2 { position: relative; width: 500px; height: 200px; background-color: blue; z-index: 1;

Avoid z-index working relative to the parent element

阅读更多关于 Avoid z-index working relative to the parent element

问题 I come with a question about an odd behavior regarding the z-index property. The situation in terms or layers is the following: div#wrapper div#sidebar (fixed position and 5 as z-index) div#pop-up (absolute position and 15 as z-index) div#black-layer (fixed position and 10 as z-index) The thing then is that I want to have a semi-transparent black layer over everything, with the next exception: over it I want another arbitrary div (depending on the case). A bit like the typical light-box. What

Updating z-index with javascript invalid left-hand side in assignment

阅读更多关于 Updating z-index with javascript invalid left-hand side in assignment

问题 I'm having a problem with Javascript. It's almost certainly something I'm doing wrong as I'm quite new to js. I'm trying to modify a div tag's z-index to 1 from -1 so an image contained in it appears in front of the other images, but keep on getting "invalid left-hand side in assignment" as an error. I've tried searching the net, but could not find a solution, probably because I'm making a rudimentary mistake. Snippets of my code are as follows: JavaScript: function bubble1() { document

D3 force layout: links and nodes — z-index(?)

阅读更多关于 D3 force layout: links and nodes — z-index(?)

问题 D3: problems between nodes and links I created the following jsfiddle to get an idea of what i'm trying to achieve: I want nodes to over(?) links... Please help me. I'm sorry for my English :) Script looks like this: function myGraph(el) { this.addNode = function (id) { nodes.push({ "id": id }); update(); } this.removeNode = function (id) { var i = 0; var n = findNode(id); while (i < links.length) { if ((links[i]['source'] == n) || (links[i]['target'] == n)) links.splice(i, 1); else i++; }