CODEWITHSUNDEEP
javascriptregex
noclist
noclist

Reputation: 1819

Regular Expression: Matching a non digit character BESIDES a certain character

I have a regular expression I'm using to autoformat a date field in a text box. I am replacing every non digit value the user attempts to enter with an empty string. How can I restrict them from entering non digit characters BESIDES the slash character ( / )?

i.e. Users should be able to enter in any digit and a slash /

var val = this.value.replace(/\D/g, '');
val = val.replace(/^([\d]{2})([\d]{2})([\d]{4})$/, "$1/$2/$3");

Upvotes: 1

Views: 2348

Answers (2)

Federico Piazza
Federico Piazza

Reputation: 30985

You can use a negated regex character class like this:

[^\d\/]

Working demo

Quoting your code you code use:

var val = this.value.replace(/[^\d\/]/g, '');
                              ^^^^^^^ ---- Replace everything but digits and /

Upvotes: 2

N. Leavy
N. Leavy

Reputation: 1074

If you wish to replace everything but a digit [0-9] or a slash [\/] then should use something like [^0-9\/] or if you prefer [^\d\/]

Upvotes: 1

Related Questions