Liehuo.. Net) the CSS course is sometimes a headache for browser compatibility. If you understand the skills and principles in the tutorial, it will not be difficult. You have collected IE7 from the Internet, 6. Solve the problem of compatibility with Fireofx and sort it out. for Web, try to write code in xhtml format, and DOCTYPE affects CSS processing. As the W3C standard, DOCTYPE must be well known.
CSS skills
1. vertical-align: middle of the div vertical center problem; Increase the line spacing to the line-height: 200px as high as the entire DIV; then insert the text, and the vertical center is formed. The disadvantage is that you need to control the content rather than line feed.
2. The problem of margin doubling is that the margin set for div of float under ie will be doubled. This is a bug in ie6. The solution is to add display: inline to the div. For example, <# div id = "imfloat"> the corresponding css is # IamFloat {float: left; margin: 5px; /* IE: 10px */display: inline;/* IE: 5px */}
3. double distance produced by floating ie # box {float: left; width: 100px; margin: 0 0 0 100px; // in this case, IE will generate a PX distance display: inline; // ignore floating} Here I will elaborate on the two elements block and inline: The block element is always starting on a new line, with the height, width, and Row Height, margins can be controlled (block elements). The Inline element is not controllable on the same line as other elements (embedded elements); # box {display: block; // The embedded element can be simulated as the block element display: inline; // the result of the same row arrangement is dilay: table;
4 IE and width and height problems IE does not recognize min-, but in fact it treats normal width and height as min. In this case, the problem is big. If only the width and height are used, the values in the normal browser will not change. If only min-width and min-height are used, the width and height under IE are not set at all. For example, to set a background image, the width is important. To solve this problem, you can: # box {width: 80px; height: 35px;} html> body # box {width: auto; height: auto; min-width: 80px; min-height: 35px ;}
5. The min-width of the page is a very convenient CSS command, which can specify the minimum or no less than a certain width of the element, so as to ensure that the layout is always correct. But IE does not recognize this, but it actually uses width as the minimum width. To make this command usable on IE, you can place <div> under the <body> label and specify a class for div. Then, CSS is designed as follows: # container {min-width: 600px; width: expression (document. body. clientWidth <600? "600px": "auto");} The first min-width is normal, but the width of row 2nd uses Javascript, which is recognized only by IE, this will also make your HTML documents less formal. It actually achieves the minimum width through Javascript judgment.
6. DIV floating IE text generates a 3-pixel bug. The left object float is located on the right side using the left margin of the outer patch. The text in the right object is 3 px away from the left. # box {float: left; width: 800px; }# left {float: left; width: 50% ;}# right {width: 50% ;} * html # left {margin-right:-3px; // This sentence is critical} <div id = "box"> <div id = "left"> </div> <div id = "right"> </div> </div>
7. Internet Explorer: When the div application is complicated, there are some links in each column. When DIV and so on, it is prone to the "hide and seek" issue. Some content cannot be displayed. When you select this area, the content is displayed on the page. Solution: Use the line-height attribute for # layout or use fixed height and width for # layout. The page structure should be as simple as possible.
8. float div closure; clear floating; adaptive height;
① For example, <# div id = "floatA"> <# div id = "floatB"> <# div id = "NOTfloatC"> the NOTfloatC here does not want to continue translation, instead, we want to move it down. (The attributes of floatA and floatB have been set to float: left;) This code has no problem in IE, and the problem lies in FF. The reason is that NOTfloatC is not a float label and must be closed. Add <# div class = "floatB"> <# div class = "NOTfloatC"> <# div class = "clear"> the position of the div, it must be at the same level as the two div with the float attribute. No nested relationship exists between them; otherwise, an exception occurs. And define the clear style as follows:. clear {clear: both ;}
② Do not set the height of the external wrapper div. In order to make the height automatically adapt, overflow: hidden should be added to the wrapper; when the box containing float is included, the height auto-fit is invalid in IE. In this case, the private attribute layout of IE should be triggered (the Internet Explorer !) Zoom: 1; can be used to achieve compatibility. For example, a wrapper is defined as follows:. colwrapper {overflow: hidden; zoom: 1; margin: 5px auto ;}
③ For typographical layout, the most commonly used css description may be float: left. sometimes we need to make a unified background behind the float div in the n column, for example: <div id = "page"> <div id = "left"> </div> <div id = "center"> </div> <div id = "right"> </div> for example, we want to set the background of the page to blue, the background color of all three columns is blue, but we will find that with the left center right extending down, and the page actually keeps the height unchanged, the problem is that, the reason is that the page is not a float attribute, and because the page is centered, it cannot be set to float, therefore, we should solve <div id = "page"> <div id = "bg" style = "float: left; width: 100% "> <div id =" left "> </div> <div id =" center "> </div> <div id =" right "> </div> </div> </div> embed a float left and the DIV with a width of 100%.
④ Universal float closure (very important !) For details about the principle of clear float, see [How To Clear Floats Without Structural Markup]. Add the following code To Global CSS and add class = "clearfix" To the div To be closed. /* 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 */or set as follows :. hackbox {display: table; // display an object as a table at the block element level}
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