A complete list of tips for making div+css compatible with all browsers

CSS技巧

1.div的垂直居中问题 vertical-align:middle; 将行距增加到和整个DIV一样高 line-height:200px; 然后插入文字，就垂直居中了。缺点是要控制内容不要换行? 

2. margin加倍的问题?设置为float的div在ie下设置的margin会加倍。这是一个ie6都存在的bug。解决方案是在这个div里面加上display:inline;?例如：?<#div id=”imfloat”>?相应的css为?#IamFloat{?float:left;?margin:5px;/*IE下理解为10px*/?display:inline;/*IE下再理解为5px*/}?

3.浮动ie产生的双倍距离?#box{ float:left; width:100px; margin:0 0 0 100px; //这种情况之下IE会产生200px的距离 display:inline; //使浮动忽略}?这里细说一下block与inline两个元素：block元素的特点是,总是在新行上开始,高度,宽度,行高,边距都可以控制(块元素);Inline元素的特点是,和其他元素在同一行上,不可控制(内嵌元素);?#box{ display:block; //可以为内嵌元素模拟为块元素 display:inline; //实现同一行排列的效果 diplay:table;?

 

4 IE与宽度和高度的问题 IE 不认得min-这个定义，但实际上它把正常的width和height当作有min的情况来使。这样问题就大了，如果只用宽度和高度，正常的浏览器里这两个值就不会变，如果只用min-width和min-height的话，IE下面根本等于没有设置宽度和高度。?比如要设置背景图片，这个宽度是比较重要的。要解决这个问题，可以这样：?#box{ width: 80px; height: 35px;}html>body #box{ width: auto; height: auto; min-width: 80px; min-height: 35px;}?

 

5.页面的最小宽度?min -width是个非常方便的CSS命令，它可以指定元素最小也不能小于某个宽度，这样就能保证排版一直正确。但IE不认得这个，而它实际上把width当做最小宽度来使。为了让这一命令在IE上也能用，可以把一个

 放到  标签下，然后为div指定一个类, 然后CSS这样设计：?#container{ min-width: 600px; width:expression(document.body.clientWidth < 600? "600px": "auto" );}?第一个min-width是正常的；但第2行的width使用了Javascript，这只有IE才认得，这也会让你的HTML文档不太正规。它实际上通过Javascript的判断来实现最小宽度。

6.DIV浮动IE文本产生3象素的bug?左边对象浮动，右边采用外补丁的左边距来定位，右边对象内的文本会离左边有3px的间距.?#box{ float:left; width:800px;}?#left{ float:left; width:50%;}?#right{ width:50%;}?*html #left{ margin-right:-3px; //这句是关键}?

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7.IE捉迷藏的问题?当div应用复杂的时候每个栏中又有一些链接，DIV等这个时候容易发生捉迷藏的问题。?有些内容显示不出来，当鼠标选择这个区域是发现内容确实在页面。 解决办法：对#layout使用line-height属性 或者给#layout使用固定高和宽。页面结构尽量简单。?

 

8.float的div闭合;清除浮动;自适应高度;?

 

① 例如：<#div id=”floatA” ><#div id=”floatB” ><#div id=” NOTfloatC” >这里的NOTfloatC并不希望继续平移，而是希望往下排。(其中floatA、floatB的属性已经设置为 float:left;)?这段代码在IE中毫无问题，问题出在FF。原因是NOTfloatC并非float标签，必须将float标签闭合。在 <#div class=”floatB”> <#div class=”NOTfloatC”>之间加上 < #div class=”clear”>这个div一定要注意位置，而且必须与两个具有float属性的div同级，之间不能存在嵌套关系，否则会产生异常。 并且将clear这种样式定义为为如下即可： .clear{ clear:both;}?

 

②作为外部 wrapper 的 div 不要定死高度,为了让高度能自动适应，要在wrapper里面加上overflow:hidden; 当包含float的 box的时候，高度自动适应在IE下无效，这时候应该触发IE的layout私有属性(万恶的IE啊！)用zoom:1;可以做到，这样就达到了兼容。?例如某一个wrapper如下定义：?.colwrapper{ overflow:hidden; zoom:1; margin:5px auto;}?

 

③对于排版,我们用得最多的css描述可能就是float:left.有的时候我们需要在n栏的float div后面做一个统一的背景,譬如:?

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?比如我们要将page的背景设置成蓝色,以达到所有三栏的背景颜色是蓝色的目的,但是我们会发现随着left center right的向下拉长,而 page居然保存高度不变,问题来了,原因在于page不是float属性,而我们的page由于要居中,不能设置成float,所以我们应该这样解决?

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?再嵌入一个float left而宽度是100%的DIV解决之?

 

④万能float 闭合(非常重要!)?关于 clear float 的原理可参见 [How To Clear Floats Without Structural Markup],将以下代码加入Global CSS 中,给需要闭合的div加上class="clearfix" 即可,屡试不爽.?/* Clear Fix */?.clearfix:after { content:"."; display:block; height:0; clear:both; visibility:hidden; }?.clearfix { display:inline-block; }?/* Hide from IE Mac */?.clearfix {display:block;}?/* End hide from IE Mac */?/* end of clearfix */?或者这样设置：.hackbox{ display:table; //将对象作为块元素级的表格显示}?

 

11.高度不适应?高度不适应是当内层对象的高度发生变化时外层高度不能自动进行调节，特别是当内层对象使用margin 或paddign 时。?例：?#box {background-color:#eee; }?#box p {margin-top: 20px;margin-bottom: 20px; text-align:center; }?

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p对象中的内容

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?Solution: Add two empty div objects above and below the P object. CSS code: .1{height:0px;overflow:hidden;} or add the border attribute to the DIV.

12. Why is there a gap under the image under IE6? There are many ways to solve this bug. You can change the layout of the html, or set the img to display:block or set the vertical-align attribute to vertical-align:top | bottom |middle |text-bottom can be solved.

13. How to align text and text input box by adding vertical-align:middle;

14. What is the difference between id and class defined in web standards? 1. Repeating IDs is not allowed in web standards, such as div id="aa"? It is not allowed to be repeated twice, and class defines a class, which can theoretically be repeated infinitely, so that definitions that require multiple references can be used He. 2. Priority issue of attributes. The priority of ID is higher than class. See Example 3 above. It is convenient for client scripts such as JS. If you want to perform script operations on an object in the page, you can define a ID, otherwise you can only find it by traversing the page elements and specifying specific attributes. This is a relative waste of time and resources, and is far less simple than an ID.

15. How to display the content in LI with ellipses after it exceeds the length This method is applicable to IE and OP browsers

16. Why can’t IE set the scroll bar color in web standards? The solution is to replace the body with html < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

17. Why can't I define a container with a height of about 1px? This problem under IE6 is caused by the default line height. How to solve it There are many, such as: overflow:hidden | zoom:0.08 | line-height:1px

18. How to make the layer display on top of FLASH? The solution is to set transparency for FLASH

19. How to vertically center a layer in the browser. Here we use percentage absolute positioning, and use the method of patching negative values. The size of the negative value is divided by its own width and height. With two ?

FF and IE?

1. Div centering problem?div setting margin-left , margin-right is already centered when it is auto. IE does not work. IE needs to set the body to be centered. First define text-algin: center in the parent element; this means that the content within the parent element is centered. ?

2. The border and background of the link (a tag)? For the a link to add a border and background color, you need to set display: block, and set float: left to ensure no line breaks. Referring to menubar, setting the height of a and menubar is to avoid dislocation of the bottom edge display. If height is not set, a space can be inserted in menubar.

3. The problem that the hover style does not appear after the hyperlink is visited. The hyperlink style that is clicked and visited no longer has hover and active. Many people should have encountered this problem. The solution is to change the arrangement of CSS attributes. Sequence: L-V-H-A Code:

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/* intLen){?strTemp+=strContent.substr(0,intLen)+" ";?strContent=strContent.substr(intLen,strContent.length);?}?strTemp+=" "+strContent;?obj.innerHTML=strTemp; } if(document.getElementById?&&?!document.all)?toBreakWord("ff", 37); /* ]]> */

 

13.为什么IE6下容器的宽度和FF解释不同呢 

让FireFox与IE兼容

The difference in the problem is whether the overall width of the container includes the width of the border. Here IE6 interprets it as 200PX, while FF interprets it as 220PX. So what exactly causes the problem? If you remove the xml at the top of the container, you will find that the original problem lies here. The statement at the top triggers IE's qurks mode

IE6, IE7, FF? IE7.0 is out, and there are new problems with CSS support. There are more browsers, and the compatibility of web pages is getting worse. We are still struggling. In order to solve the compatibility problem of IE7.0, I found the following article: Now I mostly use !important to hack, for IE6 and Firefox The test can be displayed normally, but ie7 can correctly interpret !important, which will cause the page not to be displayed as required! The following is a compatibility collection of three browsers.?

The first one is the CSS HACK method?height:20px; /*For Firefox*/?*height:25px; /*For IE7 & IE6*/ ?_height:20px; /*For IE6*/?Pay attention to the order. ?This is also a CSS HACK, but it is not as simple as the above. ?#example { color: #333; } /* Moz */?* html #example { color: #666; } /* IE6 */?*+html #example { color: #999; } /* IE7 */ ?

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The third method is the css filter method. The following is a classic translation from a foreign website. .?Create a new css style as follows:?#item {?width: 200px;?height: 200px;?background: red;?}?Create a new div and use the previously defined css style:?

some text here

?Add the lang attribute here in the body performance, the Chinese is zh:??Now define another style for the div element:?*:lang(en) #item{? background:green !important;?}? This is done to overwrite the original css style with !important. Since the :lang selector ie7.0 does not support it, it will not have any effect on this sentence, so it has also reached ie6. .0, but unfortunately, safari does not support this attribute, so you need to add the following css style: ?#item:empty {?background: green !important?}?:empty selector is css3 Specification, although Safari does not support this specification, this element will still be selected, regardless of whether this element exists, and the green color will now appear on browsers other than IE versions. ?For compatibility with IE6 and FF, you can consider the previous one!important Personally, I prefer to use it

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