check form is valid in bootstaap jquery code example

Example 1: check if form bootstrap is valid js

function form_validate(attr_id){
    var result = true;
    $('#'+attr_id).validator('validate');
    $('#'+attr_id+' .form-group').each(function(){
        if($(this).hasClass('has-error')){
            result = false;
            return false;
        }
    });
    return result;
}

Example 2: bootstrap 4 form validator with jquery

$(document).ready(function() {
  $("#submitButton").click(function() {
    //Fetch form to apply custom Bootstrap validation
    var form = $("#signup-form");

    if (form[0].checkValidity() === false) {
      event.preventDefault();
      event.stopPropagation();
    }
    
    form.addClass('was-validated');

    //Make ajax call here
  })
})