On the CSS for each browser compatibility has been a cliché, the network of tutorials everywhere. The following content is not too novel, purely personal summary, I hope to have some help for beginners.
First, CSS HACK
The following two methods can solve almost all hack today.
1,!important
With the support of IE7 to!important, the!important method is now targeted only at IE6 hack. (Note the wording. Remember that the claim position needs to be advanced.)
<style>
#wrapper
{
Width:100px!important; * IE7+FF * *
width:80px; * IE6 * *
}
</style>
2, Ie6/ie77 to Firefox
*+html and *html is the unique label of IE, Firefox is not supported. And *+html is IE7 unique label.
<style>
#wrapper
{
#wrapper {width:120px}/* FireFox/*
*html #wrapper {width:80px}////* IE6 fixed */
*+html #wrapper {width:60px}//* IE7 fixed, note order * *
}
</style>
Attention:
*+html to IE7 hack must ensure that the top of the HTML has the following declaration:
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
Second, universal float closure
The principle of clear float can be found in [how to clear floats without structural Markup]
Add the following code to the global CSS, to the need to close the div plus class= "clearfix" can be, once and for all.
<style>
/* 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 * *
</style>
Third, other compatibility skills
1, under the FF to the DIV set padding will cause the width and height increase, but IE will not. (Available!important solution)
2, center problem.
1). vertically centered. Set the line-height to the same height as the current Div, and then pass the Vertical-align:middle. (Note that the content is not wrapped.)
2). Horizontally centered. margin:0 Auto; (certainly not omnipotent)
3, if you need to add a style to the contents of a label, you need to set display:block (common to navigation tags)
4, FF and IE on the BOX understanding of the difference between the 2px is also set for float div in IE under the margin doubling and so on.
5, the UL label below the FF default has List-style and padding. It is best to make a statement beforehand to avoid unnecessary trouble. (Common in navigation labels and content lists)
6, as an external wrapper div do not set dead height, preferably plus overflow:hidden. To achieve a high degree of adaptability.
7, about the hand-shaped cursor. Cursor:pointer. And hand only applies to IE.
1 CSS styles for Firefox IE6 IE7
Now most of them are using!important to hack, and for IE6 and Firefox tests to be displayed properly,
But IE7 to!important can correctly explain, will cause the page does not appear according to the request! Find a needle
To IE7 good hack way is to use "*+html", now with IE7 browsing, should have no problem.
Now write a CSS can do this:
#1 {color: #333;}/* Moz/*
* HTML #1 {color: #666}/* IE6 * *
*+html #1 {color: #999;}/* IE7 * *
Then in Firefox font color display for #333,ie6 under the font color display for #666,ie7 under the font color display as #999.
2 centering problems in CSS layouts
The main style definitions are as follows:
body {text-align:center;}
#center {Margin-right:auto; Margin-left:auto; }
Description
First, the parent element defines text-align:center, which means that the content within the parent element is centered, and for IE this setting is OK.
But you can't center in Mozilla. The solution is to add "Margin-right:auto" when the child element definition is set; Margin-left:auto; ”
To be sure, if you want to use this method to make the entire page centered, it is recommended not to be nested in a div, you can split the multiple div in turn,
Just define Margin-right:auto in each div that is pulled out; Margin-left:auto; It's OK.
3 box models different interpretations
#box {width:600px;//for ie6.0-w\idth:500px;//for ff+ie6.0}
#box {width:600px!important//for ff width:600px;//for ff+ie6.0 width/**/:500px;//for ie6.0-}
4 double distance generated by the floating IE
#box {float:left; width:100px; margin:0 0 0 100px; In this case, IE will produce 200px distance display:inline; Make floating Ignore}
Let's go over the block,inline. Two elements, the block element is characterized by: always start on a new line, height, width, row height, margin can be controlled (blocks elements); Inline element is characterized by: and other elements on the same line,... Not controllable (inline element);
#box {display:block//can simulate an inline element as a block element display:inline//effect diplay:table the same row arrangement;
IE does not recognize the definition of min-, but in fact it treats the normal width and height as having min. This is a big problem, if you only use width and height,
In the normal browser, these two values will not change, if only with Min-width and min-height, ie below is not set width and height.
For example, to set the background picture, this width is more important. To solve this problem, you can do this:
#box {width:80px; height:35px;} Html>body #box {width:auto; height:auto; min-width:80px; min-height:35px;}
6 minimum width of the page
Min-width is a handy CSS command that specifies that the element should be minimal or less than a certain width, so that the layout will always be correct. But IE doesn't recognize this,
And it actually turns the width to the minimum. To make this command available on IE, you can put a <div> under the <body> tab, and then assign a class to the DIV:
Then CSS is designed like this:
#container {min-width:600px width:expression (Document.body.clientWidth < 600?) "600px": "Auto");
The first min-width is normal, but the width of line 2nd uses JavaScript, which only IE recognizes, which also makes your HTML document less formal. It actually achieves the minimum width through JavaScript's judgment.
7 Clear Floating
. hackbox{display:table;//Display the object as a table at the block element level} or. hackbox{Clear:both;
or add: After (Pseudo object), set in the object after the occurrence of content, usually with content with use, IE does not support this pseudo object, not IE browser support,
So it doesn't affect the Ie/win browser. This is the most troublesome ... #box: after{content: "."; display:block; height:0; clear:both; visibility:hidden;}
8 Div Floating IE text produces 3 pixel bugs
The left side of the object floating on the right side of the outer patch to locate the left margin, the right object within the text will be left with 3px spacing.
#box {float:left; width:800px;} #left {float:left; width:50%;} #right {width:50%;} *html #left {margin-right:-3px;//This sentence is the key}
HTML code <div id= "box" > <div id= "left" ></div> <div id= "right" ></div></div>
9 Property Selector (This is not compatible, is a hidden CSS bug)
p[id]{}div[id]{}
This is hidden from the IE6.0 and IE6.0 versions, and the FF and opera functions
There is a difference between the property selector and the child selector, and the scope of the child selector shrinks from the form, and the property selector is larger in scope, as in P[id], and all of the P tags have the same type of ID.
The question of IE hide-and-seek
When the div application is complex, there are some links in each column, div and so on this time is prone to hide and seek.
Some content does not show up when the mouse selects this area is found to be true on the page.
WORKAROUND: Use Line-height attribute for #layout or use fixed height and width for #layout. The page structure is as simple as possible.
11 Height Not suitable
Height is not adaptable when the height of the inner object changes when the outer height can not be automatically adjusted, especially when the inner object is used
When margin or paddign.
Cases:
<div id= "box" >
Content in the <p>p object </p>
</div>
CSS: #box {background-color: #eee;}
#box p {margin-top:20px;margin-bottom:20px; text-align:center;}
Workaround: Add 2 empty div object CSS code to and from the P object:. 1{height:0px;overflow:hidden;} Or add the border attribute to the Div.
