Marketo web form character limit

Question

Is there a way to set a limit on a form so that the user is prompted that they have written too much?
 
We recently had a user complete a form with roughly 4k characters inc spaces. Whilst the form was found on the backend of Marketo, we weren't sent an email notification.
 
We need to be able to restrict the character count as ideally, we don't want them submitting lots of information. 
 
Thanks!

SanfordWhiteman · Accepted Answer

MktoForms2.whenReady(function (mktoForm) {
   let formEl = mktoForm.getFormElem()[0],
       messageEl = formEl.querySelector("[name='message']");

   let maxLength = messageEl.getAttribute("maxlength");

   messageEl.addEventListener("input", function (e) {
      let currentLength = this.value.length;
      // do whatever you want with `currentLength` and `maxLength`
   });
});

(Replace message with the exact name of your form field.)

Example:

MktoForms2 :: Textarea counter

SanfordWhiteman · Answer

Are you talking about a single field, or the entire form?

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