<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> div{ width: 500px; height: 500px; background-color: salmon; border: 1px solid black; text-align: center; } p{ font-style: italic; } span{ font-size: 60px; } </style> </head> <body> <div> hello world! <br> <p>hello world!<span>你好呀世界!</span></p> </div> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> #div{ width: 500px; height: 500px; background-color: salmon; border: 1px solid black; text-align: center; } #p{ font-size: 60px; } </style> </head> <body> <div id="div"> hello world! <br> <p id="p">hello world!<span id="p">你好呀世界!</span></p> </div> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> *{ background-color: lawngreen; } .one{ background-color: seagreen; font-style: italic; } .two{ background-color: slateblue; font-size: 70px; } </style> </head> <body> <ul class="one"> <li>aaaaaaaaaa</li> <li>bbbbbbbbbb</li> <li>cccccccccc</li> </ul> <ul class="two"> xixixi <li>rrrr</li> <li>tttt</li> <li>yyyy</li> </ul> <ul class="one"> <li>qqqqqqq</li> <li>wwwwwww</li> <li>bbbbbbb</li> </ul> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> table tr{ background-color: lawngreen; } div>p{ background-color: mediumblue; }/*改变了所有的<p>而且<p>中的<span>也改变了*/ div>span{ background-color: lightpink; }/*没有改变<p>里面的<span>改变了<p>外面的<span> 选择的是直接子元素*/ </style> </head> <body> <table> <div> hello <br> <p>world <br> <span>喜喜</span> </p> <p>看看你改变不改变</p> <span> 那你呢</span> </div> <tr> <td>dsvfv</td> <td>fdsfd</td> <td>fdsvd</td> <td>sfdsd</td> </tr> <tr> <td>你好</td> <td>谢谢</td> <td>再见</td> <td>抱歉</td> </tr> </table> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> div{ border: 1px solid red; } div~p{ border:2px solid green; } div+p{ border:1px solid black; } </style> </head> <body> <div id="obn"> <p>hhhhhhhhhhhhhh <span>123</span></p> <p>xixixixiixiixiixi</p> </div> <p>fsgrv;dhajoewdisdkjfocidsjvoiefhkd</p> <p>覅绿化我是我欸的女警</p> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> div #one.one{ background-color: blue; font-size: 70px; } </style> </head> <body> <table> <div> hello <br> <p id="one" class="one">world <br> <p class="one">svrvsrv</p> </p> <p id="one" class="two">看看你改变不改变</p> <span> 那你呢</span> </div> </table> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> div,#ds,.o{ background-color: blue; } </style> </head> <body> <table> <div> hello <br> <p>world <br> <span>喜喜</span> </p> <p>看看你改变不改变</p> <span> 那你呢</span> </div> <tr> <td id="ds">dsvfv</td> <td>fdsfd</td> <td>fdsvd</td> <td>sfdsd</td> </tr> <tr> <td class="o">你好</td> <td>谢谢</td> <td>再见</td> <td class="o">抱歉</td> </tr> </table> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> [id]{ background-color: blue; } [class=‘o‘]{ background-color: red; } [class*=‘o‘]{ background-color: yellow; } [class~=‘o‘]{ background-color: brown; } </style> </head> <body> <table> <div> hello <br> <p>world <br> <span>喜喜</span> </p> <p>看看你改变不改变</p> <span> 那你呢</span> </div> <tr> <td id="ds">dsvfv</td> <td class="pq d o">fdsfd</td> <td>fdsvd</td> <td>sfdsd</td> </tr> <tr> <td class="o">你好</td> <td class="pqo">谢谢</td> <td>再见</td> <td class="o">抱歉</td> </tr> </table> </body> </html>
原文:https://www.cnblogs.com/bxynlbyx/p/14288779.html