redirect and post json data using forms

post.js

function post(url, data) {
    var form = $(document.createElement('form'));
    $(form).attr("action", url);
    $(form).attr("method", "POST");
    $(form).prop("hidden", true);

    for (const key in data) {
        var input = $("<input>")
            .attr("type", "text")
            .attr("name", key)
            .val(data[key]);
        $(form).append($(input));
    }

    form.appendTo(document.body);
    $(form).submit();
}