CODEWITHSUNDEEP
angularjsregexangularjs-directive
Praveen
Praveen

Reputation: 235

Regex to Allow a Special Character (:) and numbers and alphabets only

I am using AngularJS directive for my form input validation .Is there a way to make my regex allow only one special character(:)along with numbers and alphabets . This is the directive i found on stackoverflow.

        myapp.directive('noSpecialChar', function() {
    return {
        require: 'ngModel',
        restrict: 'A',
        link: function(scope, element, attrs, modelCtrl) {
            modelCtrl.$parsers.push(function(inputValue) {
                if (inputValue == null)
                    return ''
                    cleanInputValue = inputValue.replace(/[^\w\s]/gi, '');
                    cleanInputValue = cleanInputValue.toUpperCase();
                if (cleanInputValue != inputValue) {
                    modelCtrl.$setViewValue(cleanInputValue);
                    modelCtrl.$render();
                }
                return cleanInputValue;
            });
        }
    }
});

I tried adding colon at the end , but i'm unable to reach my solution .

Upvotes: 2

Views: 2340

Answers (2)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626689

Use .replace(/^([^:]*:)|\W/g, function($0,$1) { return $1 ? $1.replace(/\W+/g,'')+':' : ''; }) instead of .replace(/\W/gi, '')

See the following demo:

var s = "(*a word : 156,567-354 *)";
console.log(s.replace(/^([^:]*:)|\W/g, function($0,$1) { return $1 ? $1.replace(/\W+/g,'')+':' : ''; }));

The /^([^:]*:)|[^\w\s]/g regex will match and capture into Group 1 0+ chars other than : and a :, OR will match any char that is not a word or whitespace. If Group 1 matched, the whole contents is stripped from the chars other than word and whitespace chars and a : is added, else, the matched chars with [^\w\s] are removed.

Upvotes: 1

jj27
jj27

Reputation: 178

Based on your current code, you're looking to replace everything that is not a letter, number, or white space character.

That said, the regex [^\w\s:] should work.

\w = a-z, A-Z, 0-9

\s = white space characters \r\n\t\f\v

I would even consider removing the \s as it would allow spaces in your input, unless that is your intention.

Upvotes: 2

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