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盒子模型:
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>盒子模型</title> <style type="text/css"> /*盒子模型*/ body{border: 1px solid black;} div{border: 1px solid red;margin: 20px;padding: 20px;} div{border: 1px solid red;margin: 0px 0px 20px 20px;padding: 20px;} </style> </head> <body> <div> 我是盒子 </div> </body> </html>
内联元素与块级元素 :
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>内联元素与块级元素</title> <style type="text/css"> /*内联元素与块级元素*/ *{border: 1px solid red;} div{border: 1px solid black;} </style> </head> <body> <a href="#">百度一下</a> <i>1</i> <u>23</u> <b>456</b> <div>div</div> </body> </html>
内联元素与块级元素 :
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>内联元素与块级元素</title> <style type="text/css"> /*内联元素与块级元素*/ /*块级元素独占一行,可以设置宽高、内外边距等,比如div。内联元素不能设置宽高、内外边距等,比如span。*/ /*.box01{border: 1px solid red;width: 300px;height: 300px;padding:30px;margin: 30px;}*/ body{border:1px solid red; } </style> </head> <body> <div class="box01"> 我是第一个盒子 </div> <span>第一个span</span> <span style="width:200px;height:200px;margin-left:100px;padding-bottom:100px;margin-top:100px;">第二个span</span> <span>第三个span</span> </body> </html>
相对定位与绝对定位 :
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>相对定位与绝对定位</title> <style type="text/css"> /*相对定位与绝对定位*/ .div01{border: 1px solid red;width: 200px;height: 100px;} .div02{ border: 1px solid blue; width: 200px; height: 100px; background: yellow; position: relative; /*相对定位*/ top: 30px; left: 50px; } .div03{border: 1px solid green;width: 200px;height: 100px;} </style> </head> <body> <div class="div01">第一个div</div> <div class="div02">第二个div</div> <div class="div03">第三个div</div> </body> </html>
相对定位与绝对定位 :
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>相对定位与绝对定位</title> <style type="text/css"> /*相对定位与绝对定位*/ body{border: 2px solid black;} .div01{border: 1px solid red;width: 200px;height: 100px;} .div02{ border: 1px solid blue; width: 200px; height: 100px; background: yellow; position: absolute; /*绝对定位*/ top: 30px; left: 50px; } .div03{border: 1px solid green;width: 200px;height: 100px;} /*.box{margin-left: 200px;border: 2px solid pink;position: relative;}*/ .box{margin-left: 200px;border: 2px solid pink;} </style> </head> <body> <div class="box"> <div class="div01">第一个div</div> <div class="div02">第二个div</div> <div class="div03">第三个div</div> </div> </body> </html>
相对定位与绝对定位 :
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>相对定位与绝对定位</title> <style type="text/css"> /*相对定位与绝对定位*/ .box{border: 1px solid red;width: 500px;height: 200px;position: relative;} .box01{ background: green; width: 50px; height: 50px; position: absolute; right: 0;bottom: 0; z-index: 9999 /*z-index 属性设置元素的堆叠顺序。*/ } .box02{background: blue;width: 50px;height: 50px;position: absolute;right: 40px;bottom: 40px;} </style> </head> <body> <div class="box"> <div class="box01">第一个div</div> <div class="box02">第二个div</div> <div class="box03">第三个div</div> </div> </body> </html>
浮动:
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>浮动</title> <style type="text/css"> /*浮动*/ .box{border: 1px solid red;} .box01{border: 1px solid blue;width: 100px;height: 100px;float: left;} .box02{border: 1px solid green;width: 200px;height: 100px;float: left;} /*.clear{clear: both;}*/ /*清除浮动both*/ /*.clear{clear: block;overflow: hidden;} */ /*清除浮动*/ .box01:after{content: "haha";} /*下面这个,很NB的清除浮动方法,兼容99.99%浏览器*/ .clear:after{display: block;clear: both;content: ".";visibility: hidden;height: 0;} .clear{zoom:"1";} </style> </head> <body> <div class="box clear"> <div class="box01">第一个div</div> <div class="box02">第二个div</div> <div>第三个div</div> </div> </body> </html>
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