How to manually trigger validation with jQuery validate?

Or one can simply use: $('#myElem').valid()

if ($('#myElem').valid()){
   // will also trigger unobtrusive validation only for this element if in place 
   // add your extra logic here to execute only when element is valid
}

Note that validate() needs to be called on the form before checking it using this method.

Documentation link: https://jqueryvalidation.org/valid/

My approach was as below. Now I just wanted my form to be validated when one specific checkbox was clicked/changed:

$('#myForm input:checkbox[name=yourChkBxName]').click(
 function(e){
  $("#myForm").valid();
}
)

That library seems to allow validation for single elements. Just associate a click event to your button and try the following:

$("#myform").validate().element("#i1");

Examples here:

https://jqueryvalidation.org/Validator.element