How to match all characters after nth character with regex in JavaScript?

Question

I want to match all characters after 8th character. And not include first 8!

I need exactly a regular expression cause a framework (Ace.js) requires a regexp, not a string. So, this is not an option:

var substring = "123456789".substr(5);

Can I match everything after nth character using regex in JavaScript?

Updates: I can't call replace(), substring() etc because I don't have a string. The string is known at run time and I don't have access to it. As I already said above the framework (Ace.js) asks me for a regex.

Why don't you use .{8} in front of the rest of your regex? — ComFreek
– ComFreek, Commented Dec 9, 2013 at 16:36
You can't. This would require a lookbehind assertion which javascript doesn't support. — georg
– georg, Commented Dec 9, 2013 at 16:46
@thg435, yes, I've read about that. So, there is no other way? — Aleksei Chepovoi
– Aleksei Chepovoi, Commented Dec 9, 2013 at 16:47
@AlekseiChepovoi: I'd look into their source code how they're using the regex. Is it always match(...)[0]? — georg
– georg, Commented Dec 9, 2013 at 16:50
@thg435, to create custom highlight mode github.com/ajaxorg/ace/wiki/Creating-or-Extending-an-Edit-Mode I need to pass regex to it and I'm unable to modify their source code. Ho could I? Suppose I will need to reference it from cdn. — Aleksei Chepovoi
– Aleksei Chepovoi, Commented Dec 9, 2013 at 17:03

demongolem · Accepted Answer · 2014-05-20 15:55:27Z

21

(?<=^.{8}).*

will match everything after the 7th position. Matches 89 in 0123456789

or IJKLM in ABCDEFGHIJKLM

etc

edited May 20, 2014 at 15:55

demongolem

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answered May 20, 2014 at 15:33

David Berndt

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Comments

Niko Sams · Accepted Answer · 2013-12-09 16:37:37Z

5

console.log("123456789".match(/^.{8}(.*)/)[1])

answered Dec 9, 2013 at 16:37

Niko Sams

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1 Comment

Aleksei Chepovoi Over a year ago

/.{8}/ this selects a whole string if it's length >= 8. Check my question again please. I don't have access to the string, I need a regex, so I'm unable to use match(), subtr() or other methods

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