ng-pattern to allow alpha and certain special characters

Question

In form - name field I want to do a validation against

I tried,

 ng-pattern="/^[a-z]+[_+\+/+-+.+’][a-z]*$/"

Looks like I have missed out something as its not working!

Wiktor Stribiżew · Accepted Answer · 2016-12-01T08:36:26.043

6

Let's see:

So, combining all that, the pattern will look like:

ng-pattern="/^[a-zA-Z _\\\/.’'-]+$/"

This matches 1 or more (+) chars from the allowed set.

To disallow leading/trailing whitespace, use

ng-pattern="/^[a-zA-Z_\\\/.’'-]+(?: +[A-Za-z_\\\/.’'-]+)*$/" ng-trim="false"

The ng-trim="false" will prevent from trimming the input sent to the regex engine. The new regex will match:

^ - start of string
[a-zA-Z_\\\/.’'-]+ - 1 or more letters or allowed symbols other than space
(?: +[A-Za-z_\\\/.’'-]+)* - zero or more sequences of:
- + - (or, \s+) - 1 or more spaces (whitespaces)
- [A-Za-z_\\\/.’'-]+ - see above
$ - end of string.

edited Dec 01 '16 at 08:36

answered Dec 01 '16 at 08:09

Wiktor Stribiżew

It failed for name - Dinesh D'Soza – monda Dec 01 '16 at 08:12
Then just add the single quote to the character class. Just keep in mind that the hyphen must be at the end, right before `]`. – Wiktor Stribiżew Dec 01 '16 at 08:13
Can we restrict leading/trailing whitespace ? – monda Dec 01 '16 at 08:34
So, the requirement changed ? :) Yes, it is easy. – Wiktor Stribiżew Dec 01 '16 at 08:35

yuxhuang · Answer 2 · 2016-12-01T15:57:33.183

1

/^([a-z _\/.'-])+$/i would do. If you want any space character instead of just space, use /(^[a-z_\/.'-]|\s)+$/i.

edited Dec 01 '16 at 15:57

answered Dec 01 '16 at 08:12

yuxhuang

Your regex will match more than you think. See [Why is this regex allowing a caret?](http://stackoverflow.com/a/29771926/3832970) – Wiktor Stribiżew Dec 01 '16 at 08:19

2 Answers2