如何将我的字符串 '310519' 转换为日期 object？

Question

I have strings with dates in format '310519' ( it's 05/31/2019 ). How to convert my strings to date object? new Date('310519') not working.

Answer 1

Use a regex to reformat the string, then use new Date(s) :

 var s = "310519"; s = s.replace(/(\d{2})(\d{2})(\d{2})/, '$2/$1/$3'); console.log(new Date(s));

With .replace(/(\d{2})(\d{2})(\d{2})/, '$2/$1/$3') , you reformat the groups of two digits, bascally, swap the first and second group and insert / separators. \d{2} matches any two digits, (...) creates capturing groups that are referenced to with the help of placeholders like $1 , $2 , $3 from the replacement part.

Answer 2

The moment library can handle dates in whatever format you specify:

 const source = "310519"; const date = moment(source, "DDMMYY"); console.log(date);

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js"></script>