如何在进行自定义分页时动态应用类

我提供了一个完整的例子，防止箭头(prev, next)选择

$('ul.pagination').on('click', 'a', function() { // listen for click on pagination link
    if($(this).hasClass('active')) return false;
  
    var active_elm = $('ul.pagination a.active');
  
    if(this.id == 'next'){
      var _next = active_elm.parent().next().children('a');
      if($(_next).attr('id') == 'next') {
        
        // appending next button if reach end
        var num = parseInt($('a.active').text())+1;
        active_elm.removeClass('active');
        $('<li><a class="active" href="#">'+num+'</a></li>').insertBefore($('#next').parent());
        return; 
      }
      _next.addClass('active');   
      
      
      
      
    }
    else if(this.id == 'prev') {
      var _prev = active_elm.parent().prev().children('a');
      if($(_prev).attr('id') == 'prev') return false;
      _prev.addClass('active');   
    } else {
      $(this).addClass('active');
    }
    active_elm.removeClass('active');
    
});

ul.pagination {
    display: inline-block;
    padding: 0;
    margin: 0;
}
ul.pagination li {display: inline;}
ul.pagination li a {
    color: black;
    float: left;
    padding: 8px 16px;
    text-decoration: none;
    transition: background-color .3s;
    border: 1px solid #ddd;
}
ul.pagination li a.active {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
}
ul.pagination li a:hover:not(.active) {background-color: #ddd;}
div.center {text-align: center;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="center">
  <ul class="pagination">
    <li><a id="prev">«</a></li>
    <li><a id="test1" href="#">1</a></li>
    <li><a id="test2" class="active" href="#">2</a></li>
    <li><a href="#">3</a></li>
    <li><a href="#">4</a></li>
    <li><a href="#">5</a></li>
    <li><a href="#">6</a></li>
    <li><a href="#">7</a></li>
    <li><a href="#" id="next">»</a></li>
  </ul>
</div>

$('ul.pagination li a').on('click', function () {
  var $this = $(this),
      $active = $('ul.pagination li a.active'),      
      $elem;
  if ($this.is($active)) {
    return;
  }
  switch ($this.attr('id')) {
    case 'prev':
      $elem = $active.parent().prev().children('a');
      if ($this.is($elem)) {
        return;
      }
      $elem.addClass('active');
      break;
    case 'next':
      $elem = $active.parent().next().children('a');
      if ($this.is($elem)) {
        return;
      }
      $elem.addClass('active');
      break;
    default: 
      $this.addClass('active');
      break;
  }
  $active.removeClass('active');
});

/*Pagination CSS*/      
ul.pagination {
    display: inline-block;
    padding: 0;
    margin: 0;
}
ul.pagination li {display: inline;}
ul.pagination li a {
    color: black;
    float: left;
    padding: 8px 16px;
    text-decoration: none;
    transition: background-color .3s;
    border: 1px solid #ddd;
}
ul.pagination li a.active {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
}
ul.pagination li a:hover:not(.active) {background-color: #ddd;}
div.center {text-align: center;}
/*Pagination CSS Ends here*/

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="center">
  <ul class="pagination">
    <li><a href="#" id="prev">«</a></li>
    <li><a href="#">1</a></li>
    <li><a class="active" href="#">2</a></li>
    <li><a href="#">3</a></li>
    <li><a href="#">4</a></li>
    <li><a href="#">5</a></li>
    <li><a href="#">6</a></li>
    <li><a href="#">7</a></li>
    <li><a href="#"id="next">»</a></li>
  </ul>
</div>

首先给li添加一个active class，然后改变css样式，在li下面的a标签上应用active class

在test函数中这样写:

var index = $(".pagination > li.active").index();
$(".pagination > li.active").removeClass("active")
$(".pagination > li").eq(index-1).addClass("active")

，当你点击特殊的分页项时，这样做:

$(".pagination > li").on("click",function(){
      $(".pagination > li.active").removeClass("active");
      $(this).addClass("active");
})

首先，我建议在test函数中有一个参数，该参数将通知下一个/上一个。然后，你应该搜索current element，然后在相应的方向移动。

我还添加了选择任何页面的处理。

$('.pagination li').on('click', function() {
  var $this = $(this)
  if ($this.data('action')) {
    $this.removeClass('active');
    if (index > 0) {
      $this.closest('li').next().find('a').addClass('active');
    } else {
      $this.closest('li').prev().find('a').addClass('active');
    }
  } else {
    $('.pagination li a').removeClass('active');
    $this.find('a').addClass('active')
  }
})

ul.pagination {
  display: inline-block;
  padding: 0;
  margin: 0;
}
ul.pagination li {
  display: inline;
}
ul.pagination li a {
  color: black;
  float: left;
  padding: 8px 16px;
  text-decoration: none;
  transition: background-color .3s;
  border: 1px solid #ddd;
}
ul.pagination li a.active {
  background-color: #4CAF50;
  color: white;
  border: 1px solid #4CAF50;
}
ul.pagination li a:hover:not(.active) {
  background-color: #ddd;
}
div.center {
  text-align: center;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div class="center">
  <ul class="pagination">
    <li><a href="#" onclick='test(-1)'>«</a>
    </li>
    <li><a href="#">1</a>
    </li>
    <li><a class="active" href="#">2</a>
    </li>
    <li><a href="#">3</a>
    </li>
    <li><a href="#">4</a>
    </li>
    <li><a href="#">5</a>
    </li>
    <li><a href="#">6</a>
    </li>
    <li><a href="#">7</a>
    </li>
    <li><a href="#" onclick="test(1)">»</a>
    </li>
  </ul>
</div>