처음/마지막 요소에 특정 클래스가 있는지 어떻게 확인할 수 있습니까?

Question

나는 탭 네비게이션 작업을하고 있으며 문제가있다. 활성 탭이 첫 번째 버튼 인 경우 이전 버튼을 비활성화하고 마지막 탭이 활성화 된 경우 다음 버튼을 비활성화하고 싶습니다.

첫 번째/마지막 탭이 여기에서 활성화되어 있는지 어떻게 확인할 수 있습니까?

$(document).ready(function() { 
 

 
    $('ul.tabs li').click(function() { 
 
    var tab_id = $(this).attr('data-tab'); 
 

 
    $('ul.tabs li').removeClass('current'); 
 
    $('.tab-content').removeClass('current'); 
 

 
    $(this).addClass('current'); 
 
    $("#" + tab_id).addClass('current'); 
 
    }) 
 

 
    $('#previous').click(function() { 
 
    if($('ul.tabs li.current').prev().length != 0){ 
 
    $('ul.tabs li.current').removeClass('current').prev().addClass('current').click(); 
 
} 
 
    }) 
 

 
    $('#next').click(function() { 
 
\t if($('ul.tabs li.current').next().length != 0){ 
 
    $('ul.tabs li.current').removeClass('current').next().addClass('current').click(); 
 
\t \t } 
 
    }); 
 
})

body { 
 
    margin-top: 100px; 
 
    font-family: 'Trebuchet MS', serif; 
 
    line-height: 1.6 
 
} 
 

 
.container { 
 
    width: 800px; 
 
    margin: 0 auto; 
 
} 
 

 
ul.tabs { 
 
    margin: 0px; 
 
    padding: 0px; 
 
    list-style: none; 
 
} 
 

 
ul.tabs li { 
 
    background: none; 
 
    color: #222; 
 
    display: inline-block; 
 
    padding: 10px 15px; 
 
    cursor: pointer; 
 
} 
 

 
ul.tabs li.current { 
 
    background: #ededed; 
 
    color: #222; 
 
} 
 

 
ul.arrownavigation { 
 
    list-style: none; 
 
} 
 

 
ul.arrownavigation li { 
 
    display: inline-block; 
 
    background: #111; 
 
    color: #fff; 
 
    padding: 10px; 
 
    cursor: pointer; 
 
} 
 

 
ul.arrownavigation li:active { 
 
    background: #444; 
 
} 
 

 
ul.arrownavigation li.disabled { 
 
    opacity: 0.7; 
 
} 
 

 
.tab-content { 
 
    display: none; 
 
    background: #ededed; 
 
    padding: 15px; 
 
} 
 

 
.tab-content.current { 
 
    display: inherit; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="container"> 
 

 
    <ul class="arrownavigation"> 
 
    <li id="previous">Previous</li> 
 
    <li id="next">Next</li> 
 
    </ul> 
 

 
    <ul class="tabs"> 
 
    <li class="tab-link current" data-tab="tab-1">Tab One</li> 
 
    <li class="tab-link" data-tab="tab-2">Tab Two</li> 
 
    <li class="tab-link" data-tab="tab-3">Tab Three</li> 
 
    <li class="tab-link" data-tab="tab-4">Tab Four</li> 
 
    </ul> 
 

 
    <div id="tab-1" class="tab-content current"> 
 
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
 
    </div> 
 
    <div id="tab-2" class="tab-content"> 
 
    Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. 
 
    </div> 
 
    <div id="tab-3" class="tab-content"> 
 
    Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. 
 
    </div> 
 
    <div id="tab-4" class="tab-content"> 
 
    Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
 
    </div> 
 

 
</div> 
 
<!-- container -->

Answer 1

처럼 클릭 기능을 변경할 수 있습니다. 약간 수정 된 스크립트 (더 보편적 인, 재사용 가능한) 아래 : JSFiddle에 또한

$('.tabs-container').each(function(i) { 
 

 
    var tabsContainer = $(this); 
 
    var tabsNavigation = tabsContainer.find('.arrownavigation'); 
 
    var tabsLinks = tabsContainer.find('.tab-link'); 
 
    var tabLinkFirst = tabsContainer.find('.tab-link:first-child'); 
 
    var tabLinkLast = tabsContainer.find('.tab-link:last-child'); 
 
    var tabsContent = tabsContainer.find('.tab-content'); 
 
    var tabsPrevious = tabsContainer.find('.tab-previous'); 
 
    var tabsNext = tabsContainer.find('.tab-next'); 
 
    
 
    /* This is the function you need: */ 
 
    function checkArrows() { 
 
    \t tabsPrevious.toggleClass('tab-disabled', tabLinkFirst.hasClass('current')); 
 
     tabsNext.toggleClass('tab-disabled', tabLinkLast.hasClass('current')); 
 
    }; 
 
    checkArrows(); 
 

 
    tabsLinks.click(function() { 
 
     var tabSelector = $(this).data('tab'); 
 
     $('ul.tabs li').removeClass('current'); 
 
     $('.tab-content').removeClass('current'); 
 
     $(this).addClass('current'); 
 
     $(tabSelector).addClass('current'); 
 
     checkArrows(); 
 
    }); 
 

 
    tabsPrevious.click(function() { 
 
     var currentTab = tabsContainer.find('.tabs li.current'); 
 
     if (currentTab.prev().length > 0) { 
 
      currentTab.removeClass('current').prev().addClass('current').trigger('click'); 
 
     } 
 
    }); 
 

 
    tabsNext.click(function() { 
 
     var currentTab = tabsContainer.find('.tabs li.current'); 
 
     if (currentTab.next().length > 0) { 
 
      currentTab.removeClass('current').next().addClass('current').trigger('click'); 
 
     } 
 
    }); 
 

 
})

body { 
 
    margin-top: 100px; 
 
    font-family: 'Trebuchet MS', serif; 
 
    line-height: 1.6 
 
} 
 

 
.tabs-container { 
 
    width: 800px; 
 
    margin: 0 auto; 
 
} 
 

 
ul.tabs { 
 
    margin: 0px; 
 
    padding: 0px; 
 
    list-style: none; 
 
} 
 

 
ul.tabs li { 
 
    background: none; 
 
    color: #222; 
 
    display: inline-block; 
 
    padding: 10px 15px; 
 
    cursor: pointer; 
 
} 
 

 
ul.tabs li.current { 
 
    background: #ededed; 
 
    color: #222; 
 
} 
 

 
ul.arrownavigation { 
 
    list-style: none; 
 
} 
 

 
ul.arrownavigation li { 
 
    display: inline-block; 
 
    background: #111; 
 
    color: #fff; 
 
    padding: 10px; 
 
    cursor: pointer; 
 
} 
 

 
ul.arrownavigation li:active { 
 
    background: #444; 
 
} 
 

 
ul.arrownavigation li.disabled { 
 
    opacity: 0.7; 
 
} 
 

 
.tab-content { 
 
    display: none; 
 
    background: #ededed; 
 
    padding: 15px; 
 
} 
 

 
.tab-content.current { 
 
    display: inherit; 
 
} 
 

 
ul.arrownavigation li.tab-disabled { 
 
    background: none #ccc; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="tabs-container"> 
 

 
    <ul class="arrownavigation"> 
 
     <li class="tab-arrow tab-previous">Previous</li> 
 
     <li class="tab-arrow tab-next">Next</li> 
 
    </ul> 
 

 
    <ul class="tabs"> 
 
     <li class="tab-link current" data-tab=".tab-1">Tab One</li> 
 
     <li class="tab-link" data-tab=".tab-2">Tab Two</li> 
 
     <li class="tab-link" data-tab=".tab-3">Tab Three</li> 
 
     <li class="tab-link" data-tab=".tab-4">Tab Four</li> 
 
    </ul> 
 

 
    <div class="tab-content tab-1 current"> 
 
     Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
 
    </div> 
 
    <div class="tab-content tab-2"> 
 
     Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. 
 
    </div> 
 
    <div class="tab-content tab-3"> 
 
     Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. 
 
    </div> 
 
    <div class="tab-content tab-4"> 
 
     Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
 
    </div> 
 

 
</div>

.

Answer 2

당신은 당신이해야 할 것은 첫 번째와 마지막 탭은 current 클래스가 있는지 확인하는 것입니다이

$('ul.tabs li').click(function() { 
    var tab_id = $(this).attr('data-tab'); 
    var index = $(".tabs li").index(this); 

    if (index == 0) 
    { 
     $('#previous').hide(); 
    } 
    else if (index + 1 == $(".tabs li").length) 
    { 
     $('#next').hide(); 
    } 
    else 
    { 
     $('#next').show(); 
     $('#previous').show(); 
    } 

    $('ul.tabs li').removeClass('current'); 
    $('.tab-content').removeClass('current'); 

    $(this).addClass('current'); 
    $("#" + tab_id).addClass('current'); 
})