题解 | 文件扩展名
文件扩展名
https://www.nowcoder.com/practice/01ca4c6aa14249c2911f89baba9dc023
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
</head>
<body>
<script>
const _getExFilename = (filename) => {
// 补全代码
return "." + filename.split(".")[1];
};
</script>
</body>
</html>
