一、class的使用html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> /*#p1{ font-size: 30px; color: green; } #p2{ color: green; text-decoration: underline; } #p3{ font-size: 30px; text-decoration: underline; }*/ .lg{ font-size: 30px; } .lv{ color: green; } .un{ text-decoration: underline; } </style> </head> <body> <!-- 公共類 --> <p id="p1" class="lg lv">張孕康1</p> <p id="p2" class="lv un">張孕康2</p> <p id="p3" class="lg un">張孕康3</p> </body> </html>
二、後代選擇器佈局
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .father .wu{ color: green; } </style> </head> <body> <div class="father"> <p>alex</p> <ul> <li> <p class="wu">wusir</p> </li> </ul> </div> <p class="wu">日天</p> </body> </html>
三、子帶選擇器spa
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> /*.father>p{ color: red; }*/ .father>ul>li{ width: 100px; } .container{ color: red; } </style> </head> <body> <div class="father"> <p>alex</p> <p>alex</p> <p>alex</p> <p>alex</p> <div class="content"> <p>wusir</p> </div> <ul> <li> alex2 <ul> <li>wusir</li> </ul> </li> </ul> </div> <div class="container"> <p>日天</p> </div> </body> </html>
四、屬性選擇器code
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <style> form input[type='text']{ background-color: red; } form input[type='password']{ background-color: yellow; } form #user{ background-color: green; } </style> </head> <body> <form action=""> <input type="text" id="user"> <input type="password"> </form> </body> </html>
五、僞類選擇器orm
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <style> /*a:hover{ color: #ff6700 }*/ /*愛恨準則 LoVe HAte*/ /*沒有被訪問的a標籤的顏色*/ a:link{ color: green; } /*訪問事後的a標籤的顏色*/ a:visited{ color: yellow; } /*鼠標懸停的時候a標籤的顏色*/ a:hover{ color: red; } a:active{ color: blue; } span:hover{ color: red; font-size: 24px; text-decoration: underline; } .child{ display: none; } .father:hover .child{ color: red; display: block; } </style> </head> <body> <a href="#">百度一下</a> <span>alex</span> <div class="father"> wusir <p class="child">alex</p> </div> </body> </html>
六、僞元素選擇器htm
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> p:first-letter{ color: red; font-size: 26px; } /*用僞元素 屬性必定是content*/ /*僞元素選擇器與後面的佈局有很大關係*/ p:before{ content: '$' } p:after{ content: '.' } .box2{ /*需求:這個盒子必定是塊級標籤 span==>塊 而且再也不頁面中佔位置。將來與佈局有很大關係 */ /*隱藏元素 不佔位置*/ /*display: none;*/ display: block; /*display: none;*/ /*隱藏元素 佔位置*/ visibility: hidden; height: 0; } </style> </head> <body> <p class="box"> <span>alex</span> </p> <span class="box2">alex</span> <div>wusir</div> </body> </html>
七、盒模型blog
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .box{ width: 200px; height: 200px; background-color: red; padding: 50px; border: 10px solid green; /*margin-left: 50px;*/ } </style> </head> <body> <!-- width:內容的寬度 height:內容的高度 padding:內邊距 border:邊框 margin:外邊距 --> <div class="box"></div> </body> </html>