How to check for alphanumeric characters

Question

I'm writing a custom method for a jQuery plugin:

jQuery.validator.addMethod("alphanumeric", function(value, element) {
        return this.optional(element) || (/*contains "^[a-zA-Z0-9]*$"*/);
});

I know the regexp for what I want, but I'm not sure how to write something in JS that will evaluate to True if it contains the alphanumeric characters. Any help?

Answer 1

See test RegExp method.

jQuery.validator.addMethod("alphanumeric", function(value, element) {
        return this.optional(element) || /^[a-zA-Z0-9]+$/.test(value);
});