将两个正则表达式合二为一

Question

there I apply two regular expression to javascript string:

url.replace(/(^https?\:\/\/)?(www\.)?/i, '').replace(/\/$/, '')

how can I combine them into one replace function?

Answer 1

Since the replacement is the same, you can use alternation to match/replace "this" or "that":

 let url = 'http://www.example.com/'; console.log(url.replace(/^(?:https?\\:\\/\\/)?(?:www\\.)?|\\/$/gi, ''));