javascript - 使用jquery在循环中分页上一个和下一个

Question

我正在对单击 next increment 和 prev decrement 结果值进行分页。我已经试过了，谁能建议我该怎么做。

$(document).ready(function() {
  var num = 5;
  $('.prev').on('click', function() {
    alert('dsdsd');
    for (var i = 0; i <= num.length; i--) {
      console.log(num);
      $('.result').append(num);
    }
  });

  $('.next').on('click', function() {
    for (var i = 0; i <= num.length; i++) {
      $('.result').append(num);
    }

  });
});

.prev,
.next {
  cursor: pointer;
}

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

Answer 1

你不需要循环来增加或减少点击按钮的次数

$(document).ready(function() {
  var num = 5;
  $('.prev').on('click', function() {
    alert('dsdsd');
   
   num--;
   $('.result').text(num);
  });

  $('.next').on('click', function() {
    num++;
   $('.result').text(num);

  });
});

.prev,
.next {
  cursor: pointer;
}

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