이전 회전 목마 항목이 작동하지 않는 버튼

Question

<div class="row" style="padding-below:20px"> 
       <div class="col-md-12"> 
        <div class="carousel slide" id="carousel" data-ride="carousel"> 
         <ol class="carousel-indicators"> 
          <li data-target="#carousel" data-slide-to="0" class="active"></li> 
          <li data-target="#carousel" data-slide-to="1"></li> 
          <li data-target="#carousel" data-slide-to="2"></li> 
         </ol> 
         <div class="carousel-inner" role="listbox"> 
          <div class="item active"> 
           <img src="#"> 
           <div class="carousel-caption"> 
            <h2 class="media-heading"> 
             Workshop/event name 
            </h2> 
            <p>Description in a few lines and click on more to see details of the workshop. Or maybe not keep the more button only.</p> 
            <p><a href="#"><button class="btn btn-info">More &raquo;</button></a></p> 
           </div> 
          </div> 
          <div class="item"> 
           <img src="#"> 
           <div class="carousel-caption"> 
            <h2 class="media-heading"> 
             Workshop/event name 
            </h2> 
            <p>Description in a few lines and click on more to see details of the workshop. Or maybe not keep the more button only.</p> 
            <p><a href="#"><button class="btn btn-info">More &raquo;</button></a></p> 
           </div> 
          </div> 
          <div class="item"> 
           <img src="#"> 
           <div class="carousel-caption"> 
            <h2 class="media-heading"> 
             Workshop/event name 
            </h2> 
            <p>Description in a few lines and click on more to see details of the workshop. Or maybe not keep the more button only.</p> 
            <p><a href="#"><button class="btn btn-info">More &raquo;</button></a></p> 
           </div> 
          </div> 
         </div> 
         <a class="left carousel-control" href="#carousel" role="button" data-slide="prev"> 
         <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>Previous 
         </a> 
         <a class="right carousel-control" href="#carousel" role="button" data-slide="next"> 
         <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>Next 
         </a> 
         <div class="btn-group" id="cbuttons"> 
          <button class="btn btn-danger btn-xs" id="cpause"><span class="glyphicon glyphicon-pause"></span></button> 
          <button class="btn btn-danger btn-xs" id="cplay"><span class="glyphicon glyphicon-play"></span></button> 
         </div> 
        </div> 
       </div> 
      </div> 

나는 회전 목마를 만들었습니다. 그러나 클릭 할 수 있고 이전 회전식 항목으로 이동해야하는 '이전'글리프콘 화살표가 작동하지 않습니다. 그것은 전혀 표시되지 않습니다. 내 코드가 어디에서 잘못 되었습니까? 다음 회전 목마 항목을 핑 (pint)하는 데 사용되는 버튼과 글리 핀콘 화살표는 정상적으로 작동하지만 '이전'항목은 표시되지 않습니다.

Answer 1

Try this below code. 
<!-- Carousel 
================================================== --> 
<div id="myCarousel" class="carousel slide" data-ride="carousel"> 
    <!-- Indicators --> 
    <ol class="carousel-indicators"> 
    <li data-target="#myCarousel" data-slide-to="0" class=""></li> 
    <li data-target="#myCarousel" data-slide-to="1" class="active"></li> 
    <li data-target="#myCarousel" data-slide-to="2" class=""></li> 
    </ol> 
    <div class="carousel-inner" role="listbox"> 
    <div class="item"> 
     <img class="first-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="First slide"> 
     <div class="container"> 
     <div class="carousel-caption"> 
      <h1>Example headline.</h1> 
      <p>Note: If you're viewing this page via a <code>file://</code> URL, the "next" and "previous" Glyphicon buttons on the left and right might not load/display properly due to web browser security rules.</p> 
      <p><a class="btn btn-lg btn-primary" href="http://getbootstrap.com/examples/carousel/#" role="button">Sign up today</a></p> 
     </div> 
     </div> 
    </div> 
    <div class="item active"> 
     <img class="second-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Second slide"> 
     <div class="container"> 
     <div class="carousel-caption"> 
      <h1>Another example headline.</h1> 
      <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p> 
      <p><a class="btn btn-lg btn-primary" href="http://getbootstrap.com/examples/carousel/#" role="button">Learn more</a></p> 
     </div> 
     </div> 
    </div> 
    <div class="item"> 
     <img class="third-slide" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Third slide"> 
     <div class="container"> 
     <div class="carousel-caption"> 
      <h1>One more for good measure.</h1> 
      <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p> 
      <p><a class="btn btn-lg btn-primary" href="http://getbootstrap.com/examples/carousel/#" role="button">Browse gallery</a></p> 
     </div> 
     </div> 
    </div> 
    </div> 
    <a class="left carousel-control" href="http://getbootstrap.com/examples/carousel/#myCarousel" role="button" data-slide="prev"> 
    <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span> 
    <span class="sr-only">Previous</span> 
    </a> 
    <a class="right carousel-control" href="http://getbootstrap.com/examples/carousel/#myCarousel" role="button" data-slide="next"> 
    <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span> 
    <span class="sr-only">Next</span> 
    </a> 
</div><!-- /.carousel -->