Hi @sergeysh,

You can toggle class via jQuery.

jQuery

$(document).ready(function($) {
  let alterClass = function() {
    let ww = document.body.clientWidth;
    if (ww < 400) {
      $('#YOUR-ELEMENT').addClass('no-gutters');
    } else if (ww >= 401) {
      $('#YOUR-ELEMENT').removeClass('no-gutters');
    };
  };
  $(window).resize(function(){
    alterClass();
  });
  //Fire it when the page first loads:
  alterClass();
});

That's what I did, please advice if you know better solution:

<div class="row no-gutters">
<div class="col-12 col-md-4 px-md-2">