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'2017-6-5'.replace(/-(\d{1})$|-/g,'0'),返回为什么是20170605，少了"-"，我要的结果是2017-06-05
闭关修行中......
'2017-6-5'.replace(/-(d{1})/g,'-0$1') Try writing it like this.
'2017-6-5'.replace(/-(d{1})/g,'-0$1')
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
'2017-6-5'.replace(/-(d{1})/g,'-0$1')Try writing it like this.