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 const reg = /.[a-zA-z]+$/ return filename.match(reg) } </script> </body> </html>