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<head>\n <meta charset=\"UTF-8\">\n <style>\n div::after{\n content:\"\";\n\t\twidth: 20px;\n\t\theight: 20px;\n\t\tbackground-color: rgb(255, 0, 0);\n display:block;\n\t}\n </style>\n</head>\n<body>\n <div></div> \n</body>\n</html>","css":"","js":""}
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