求个优雅的格式时间的方法

Question

问题遇到的现象和发生背景

时间字符串："20211118213035"
目标时间字符串："2021-11-18 21:30:35"
尝试用过死方法：如下
"20211118213035".replace(/(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/, '$1-$2-$3 $4:$5:$6')

求个优雅一点。

Answer 1

这个已经很优雅了，我见过不优雅的用substring去拼字符串的呢