单击其他按钮时如何删除标签的类别

Question

The html code is:

<div style="border:1px solid black;border-radius:10px;padding:3px;">
    <a id="tblBtn" status="10" data-id="1" href="#" class="btn btn-default">10</a>
    <a id="tblBtn" status="2" data-id="2" href="#" class="btn btn-default">2</a>
    <a id="tblBtn" status="1" data-id="3" href="#" class="btn btn-default">1</a>
    <a id="tblBtn" status="3" data-id="4" href="#" class="btn btn-default">3</a>
    <a id="tblBtn" status="12" data-id="5" href="#" class="btn btn-default">12</a>
</div>

And the js is:

$("body div#tablesAvailable div a").click(function () {
    var attrClass = $(this).attr("class");

    if (attrClass == "btn btn-primary") {
        $(this).attr("class", "btn btn-default");
        $("#lblTableNo").html("Table No:");
    }
    if (attrClass == "btn btn-default") {
        newno = $(this).html();
        $("#lblTableNo").html("Table No:" + newno);//replaceWith("<label id='lblTableNo'>Table No:" + newno + "</label>");
        //$("#lblTableNo").append($(this).html());
        $(this).attr("class", "btn btn-primary");
    }  
});

I only need class primary of button which is clicked and remove class primary of previously clicked classes but the code is working for double click of button only.

Answer 1

Your logic is much more complicated than necessary, I presume because you're trying to work around the issue with dynamically changing the class at runtime means the selectors stop working. A much better way to achieve that is to use a delegated event handler.

Then you can split the events on the buttons by class. You can also use toggleClass() to amend the classes, and you can target the existing .btn-primary elements to remove that class when another is clicked.

Also note that id attributes must be unique. If you need to group elements by behaviour, use a class . I removed the id in the example below as it's irrelevant. In addition, status is not a valid attribute for an a element and would mean your HTML is invalid. If you want to store metadata in an element, use a data attribute, exactly as you are for data-id . Lastly, put CSS in an external stylesheet, not inline.

With all that said, try this:

 $('div').on('click', 'a.btn-primary', function() { $(this).toggleClass('btn-primary btn-default'); $("#lblTableNo").html("Table No:"); }); $('div').on('click', 'a.btn-default', function() { $('a.btn-primary').add(this).toggleClass('btn-primary btn-default'); $("#lblTableNo").html("Table No:" + $(this).html()); }); 

 .btn-container { border: 1px solid black; border-radius: 10px; padding: 3px; } .btn { margin: 5px; padding: 5px; border: 1px solid #888; display: inline-block; border-radius: 10px; min-width: 20px; text-align: center; background-color: #CCC; text-decoration: none; } .btn-primary { color: #EEE; background-color: #C00; border-color: #C00; } 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="btn-container"> <a data-status="10" data-id="1" href="#" class="btn btn-default">10</a> <a data-status="2" data-id="2" href="#" class="btn btn-default">2</a> <a data-status="1" data-id="3" href="#" class="btn btn-default">1</a> <a data-status="3" data-id="4" href="#" class="btn btn-default">3</a> <a data-status="12" data-id="5" href="#" class="btn btn-default">12</a> </div> <div id="lblTableNo"></div> 

Answer 2

You can't have duplicate ids so try using common class name If you are just trying to toggle the class btn-primary . Try this solution

 $("a.btn-default").off().on('click', function() { $("a.btn-default").removeClass('btn-primary'); $(this).addClass('btn-primary'); }); 

 .btn-primary { color: green; } 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div style="border:1px solid black;border-radius:10px;padding:3px;"> <a status="10" data-id="1" href="#" class="btn btn-default">10</a> <a status="2" data-id="2" href="#" class="btn btn-default">2</a> <a status="1" data-id="3" href="#" class="btn btn-default">1</a> <a status="3" data-id="4" href="#" class="btn btn-default">3</a> <a status="12" data-id="5" href="#" class="btn btn-default">12</a> </div> 

I haven't mentioned your other codes such as $("#lblTableNo").html("Table No:"); because I don't have any idea exactly what you're trying to do