题解 | #CSS选择器——伪元素#
CSS选择器——伪元素
https://www.nowcoder.com/practice/b647425a1b464aff825a45d2b1825638
{"html":"<!DOCTYPE html>\n<html>\n\n<head>\n <meta charset=\"UTF-8\">\n <style>\n /* 填写样式 */\n div::after {\n content:\"\";\n display:block;\n width: 20px;\n height: 20px;\n background-color: rgb(255, 0, 0);\n }\n </style>\n</head>\n\n<body>\n <div></div> \n <script type=\"text/javascript\">\n /* 填写JavaScript */\n \n </script>\n</body>\n\n</html>","css":"","js":""}
display和content一个都不能少
