{"html":"<!DOCTYPE html>\n<html>\n\n<head>\n    <meta charset=\"UTF-8\">\n    <style>\n       .box {\n    width: 100px;\n    height: 100px;\n    /*补全代码*/\n    position:fixed;/*相对于浏览器视口进行定位*/\n    left:0;\n    top:0;\n    background-color:lightblue;/*背景颜色*/\n    \n}\n    </style>\n</head>\n\n<body>\n  <div class='box'></div> \n    <script type=\"text/javascript\">\n        /* 填写JavaScript */\n        \n    </script>\n</body>\n\n</html>","css":"","js":""}