RegEx for maximum length in JavaScript

问题

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?

回答1:

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

回答2:

Match the start and the end.

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

Your improved example

回答3:

you must use end of string symbol $

like this ^.{6,7}$

回答4:

You are missing the end anchor:

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

来源：https://stackoverflow.com/questions/11511154/regex-for-maximum-length-in-javascript