RegEx for maximum length in JavaScript

Question

How can I limit the length of a string matching a RegEx

I assumed that var sixCharsRegEx = /^.{6,7}/ would only match strings of lengths 6 or 7

but no: http://jsfiddle.net/FEXbB/

What am I missing?

Arkadiusz 'flies' Rzadkowolski · Accepted Answer · 2012-07-16 19:27:39Z

56

You are missing closing dollar at the end. Correct one is: /^.{6,7}$/

answered Jul 16, 2012 at 19:27

Arkadiusz 'flies' Rzadkowolski

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1 Comment

Arkadiusz 'flies' Rzadkowolski Over a year ago

$ in this case means, that the 6th or 7th char will the last one.

Madara's Ghost · Accepted Answer · 2012-07-16 19:27:47Z

9

Match the start and the end.

var sixCharsRegEx = /^.{6,7}$/;

Your improved example

answered Jul 16, 2012 at 19:27

Madara's Ghost

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Comments

burning_LEGION · Accepted Answer · 2012-07-16 19:28:46Z

6

you must use end of string symbol $

like this ^.{6,7}$

answered Jul 16, 2012 at 19:28

burning_LEGION

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Esailija · Accepted Answer · 2012-07-16 19:28:07Z

5

You are missing the end anchor:

var sixCharsRegEx = /^.{6,7}$/

answered Jul 16, 2012 at 19:28

Esailija

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