nekrochan/static/js/captcha.js

$(function () {
    $("#get-captcha").click(function () {
        let btn = $(this);

        let board = btn.attr("data-board");
        let reply = btn.attr("data-reply");
        let req_url = `/captcha?board=${board}&reply=${reply}`;

        btn.text("Získat CAPTCHA");
        btn.prop("disabled", true);
        btn.addClass("loading");

        $.get(req_url, function (data, _) {
            try {
                $("#captcha-id").prop("value", data.id);
                $("#captcha").html(`<img src="data:image/png;base64,${data.png}">`);
            } catch {
                btn.append(" [Chyba]");
            }

            btn.prop("disabled", false);
            btn.removeClass("loading");
        });
    });
});