minecraft-launcher-registration/public/js/chat.js

$(document).ready(() => {
    const sendData = async () => {
        alert(1);
    }

    $("#send-message-button").click(sendData);

    $('#chat-input').keyup(function(e){
        if(e.keyCode == 13)
        {
            $(this).trigger("enterKey");
        }
    });

    $("#chat-input").bind("enterKey", sendData);
});