RegEx Pattern to Match Only Certain Characters

user_159710 0
Viewed 112389

I'm a newbie to RegEx, and this particular issue is flummoxing me. This is for use with a JavaScript function.

I need to validate an input so that it matches only these criteria:

  • Letters A-Z (upper and lowercase)
  • Numbers 0-9
  • The following additional characters: space, period (.), comma (,), plus (+), and dash (-)

I can write a pattern easily enough for the first two criteria, but the third one is more difficult. This is the last pattern I managed, but it doesn't seem to work with the test string Farh%%$$+++,

Here's the pattern I'm trying 

[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\\+\\.\\,\\s]*$

It's failing in that it's letting characters other than those specified in the text field when submitting the form.

Any help would be greatly appreciated.

javascript regex
5 Answers

For validate selector as ID only (according to allowed characters https://www.w3.org/TR/html4/types.html#type-id): 

var isValidIdSelector = function (str) {
    var regex = new RegExp(/^[A-Za-z][A-Za-z0-9_\-\:\.]*$/gm);
    return regex.test(str);
};
user_100269260 
ng-pattern="/^[a-zA-Z0-9/&quot&quot\\\]\[:;|=,+*?<>]+$/"

allows: alphanumeric + " / \ [ ] : ; | = , + * ? <>

user_13314490
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