$(owl[i]).owlCarousel();let owl = $(".owl-elem");
owl.each(function() {
$(this).owlCarousel();
});let owl = documentQuerySelectorAll(".owl-elem");
for (let i = 0; i < owl.lenght; i++) {
$(owl[i]).owlCarousel();
}<form>
<input type="text" name="otprav">
<button>Отправить</button>
</formdocument.querySelector("form").addEventListener("submit", function(e) {
e.preventDefault();
const data = new FormData(this);
alert("Учи основы форм! \n MSG: " + data.get("otprav"));
});Notice: Undefined variable: data in C:\Server\www\gen\index.php on line 12body.loading p {
color: #2C62B3;
}if (allLoaded())
{
document.body.classList.remove("loading");
}