CODEWITHSUNDEEP
javascriptregex
RHPT
RHPT

Reputation: 2650

RegEx Pattern to Match Only Certain Characters

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:

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.

Upvotes: 43

Views: 143545

Answers (5)

nilecrocodile
nilecrocodile

Reputation: 385

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);
};

Upvotes: 2

nivas
nivas

Reputation: 53

ng-pattern="/^[a-zA-Z0-9/&quot&quot\\\]\[:;|=,+*?<>]+$/"

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

Upvotes: -4

Mitchel Sellers
Mitchel Sellers

Reputation: 63126

I just tested this out, and it seems to work at least from my first round testing.

^[a-zA-Z 0-9\.\,\+\-]*$

Upvotes: 67

Asaph
Asaph

Reputation: 162771

The dash needs to be first in order not to be interpreted as a range separator. Also, make sure you anchor your regex with a ^ and $ at the beginning and end respectively so that your entire test string gets swallowed by your regex.

/^[-+., A-Za-z0-9]+$/

Upvotes: 18

SilentGhost
SilentGhost

Reputation: 319531

/^[a-z0-9 .,+-]+$/i

Upvotes: 4

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