Question

I am using the jQuery validation plugin. Great stuff! I want to migrate my existing ASP.NET solution to use jQuery instead of the ASP.NET validators. I am missing a replacement for the regular expression validator. I want to be able to do something like this:

$('Textbox').rules('add', { regularExpression: '^[a-zA-Z'.\s]{1,40}$' }) 

How do I add a custom rule to achieve this?

Answer 1

Thanks to the answer of redsquare I added a method like this:

$.validator.addMethod(   "regex",   function(value, element, regexp) {     var re = new RegExp(regexp);     return this.optional(element) || re.test(value);   },   "Please check your input." ); 

Now all you need to do to validate against any regex is this:

$("#Textbox").rules("add", { regex: "^[a-zA-Z'.\\s]{1,40}$" }) 

Additionally, it looks like there is a file called additional-methods.js that contains the method "pattern", which can be a RegExp when created using the method without quotes.

---

Edit

The pattern function is now the preferred way to do this, making the example:

$("#Textbox").rules("add", { pattern: "^[a-zA-Z'.\\s]{1,40}$" }) 

• https://cdnjs.com/libraries/jquery-validate
  • https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.2/jquery.validate.min.js
  • https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.2/additional-methods.min.js