css选择器
<html><head lang="en"> <meta charset="UTF-8"> <title></title> <style> /*标签选择器*/ div{ color: red; } p{ color: blue; } /*类选择器*/ .one{ color: yellow; } /*id选择器*/ #main{ font-size: 40px; } /*后代选择器*/ #test2 div{ color: green; } </style> </head> <body> <div id="main">1111111111</div> <div>1111111111</div> <div>1111111111</div> <p>2222222222222</p> <div class="one">222222</div> <p class="one">444444444</p> <div id="test2"> <p> </p><div class="test1"> rewgrgrtwgrt </div> <p></p> </div> </body></html>