require([
'jquery',
'mage/validation'
], function($){
var dataForm = $('#form-validate');
var ignore = null;
dataForm.mage('validation', {
ignore: ignore ? ':hidden:not(' + ignore + ')' : ':hidden'
}).find('input:text').attr('autocomplete', 'off');
$('button#my-button').click( function() { //can be replaced with any event
dataForm.validation('isValid'); //validates form and returns boolean
});
});
#form-validate – Replace with your form id
#my-button – Replace with your button id

