JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://api.trello.com/1/client.js?key=00f1dd1e00000f1dd1e00000f1dd1e00&amp;dummy=.js"></script>
<div id="loggedout">
    <a id="connectLink" href="#">Connect To Trello</a>
</div>

<div id="loggedin">
    <div id="header">
        Logged in to as <span id="fullName"></span> 
        <a id="disconnect" href="#">Log Out</a>
    </div>
    
    <div id="output"></div>
</div>

CSS

body {
    font-family: arial;
    font-size: 12px;
}

#loggedout {
    text-align: center;
    font-size: 20px;
    padding-top: 30px;
}
#loggedin { 
    display: none; 
}

#header {
    padding: 4px;
    border-bottom: 1px solid #000;
    background: #eee;
}

#output {
    padding: 4px;
}

.board { 
    display: block; 
    padding: 2px;
    cursor: pointer;
}

JavaScript

/* 
Create a card in a list, and add a blue label to it

NOTE: The Trello client library has been included as a Managed Resource.  To include the client library in your own code, you would include jQuery and then

<script src="https://api.trello.com/1/client.js?key=your_application_key">...

See https://trello.com/docs for a list of available API URLs

The API development board is at https://trello.com/api

The &dummy=.js part of the managed resource URL is required per http://doc.jsfiddle.net/basic/introduction.html#add-resources
*/

var onAuthorize = function() {
    updateLoggedIn();
    $("#output").empty();
    
    Trello.members.get("me", function(member){
        $("#fullName").text(member.fullName);
    
        var $boards= $("<div>")
            .text("Loading Cards...")
            .appendTo("#output");

        // Output a list of all of the cards that the member 
        // is assigned to
        Trello.get("members/me/boards", function(boards) {
            $boards.empty();
            $("<div>").text("Click a board to add a comment to it").css("font-weight", "bold").appendTo($boards);
            
            $.each(boards, function(ix, board) {
                $("<a>")
                .addClass("board")
                .text(board.name)
                .appendTo($boards)
                .click(function(){
                    Trello.get("/boards/" + board.id + "/lists", function(lists) {
                        Trello.post("lists/" + lists[2].id + "/cards", { name: "Hello from jsfiddle.net!" }, function(card) {
                            Trello.post("cards/" + card.id + "/labels", { value: "blue" }); 
                        });
                    });
                })
            });  
        });
    });

};

var updateLoggedIn = function() {
    var isLoggedIn = Trello.authorized();
    $("#loggedout").toggle(!isLoggedIn);
    $("#loggedin").toggle(isLoggedIn);        
};
    
var logout = function() {
    Trello.deauthorize();
   ...