VWO does not collect or store sensitive user information, for instance, a checkout page where visitors type a credit card number. By default, VWO automatically ignores all password input fields and never transmits, stores, or replays what is typed. For all input and non-input types that you want to ignore, add
nls_protected class to the element.
For example, the following code tells VWO to ignore a credit card number field:
<input type="text" name="cc_number" class="nls_protected"/>