如何在javascript中将两个正则表达式合二为一？

Question

How to combine two regex in one in Javascript?

First regex: /^(?:36[0-4]|3[0-5]\\d|[12]\\d{2}|[0-9]\\d?)$/

Second regex: /^0[0-9].*$/

I tried with this and does not work:

• /^(?:36[0-4]|3[0-5]\\d|[12]\\d{2}|[0-9]\\d?)$ | ^0[0-9].*$/
• /^(?:36[0-4]|3[0-5]\\d|[12]\\d{2}|[0-9]\\d?)$|^0[0-9].*$/
• /^(?:36[0-4]|3[0-5]\\d|[12]\\d{2}|[0-9]\\d?)|^0[0-9].*$/

Answer 1

You need to wrap alernative ( | ) branches in groups. Try this one:

/(?:^(?:36[0-4]|3[0-5]\d|[12]\d{2}|[0-9]\d?)$)|(?:^0[0-9].*$)/

Or to simplify:

/^(36[0-4]|3[0-5]\d|[12]\d{2}|[0-9]\d?)|(?:0[0-9].*)/