字符串时间20180210转化为2018-02-10

效果

20180210->2018-02-10

 

核心

str.replace(/^(\d{4})(\d{2})(\d{2})$/, "$1-$2-$3 ") ;

 

封装

function timeFormat(str) {
   return str.replace(/^(\d{4})(\d{2})(\d{2})$/, "$1-$2-$3 ")
}

 

源码

格式化字符串时间