javascript - 通过 jQuery 选择 Previous 和 next 选项

Question

单击下一个或上一个按钮时出现错误。这是我的 HTML

$("#nextPage").click(function() {
  $('#pagination option:selected').next().attr('selected', 'selected');
  console.log("hahaha next");
})

$("#prevPage").click(function() {
  $('#pagination option:selected').prev().attr('selected', 'selected');
  console.log("prev");
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="button" value="prev" id="prevPage">
<select id="pagination">
    	<option value="1" selected>1</option>
    	<option value="2">2</option>
    	<option value="3">3</option>
    	<option value="4">4</option>
    	<option value="5">5</option>
    	<option value="6">6</option>
    </select>
<input type="button" value="next" id="nextPage">

Here is my jsfiddle

谢谢

Answer 1

使用 prop 而不是 attr 并且它的工作完美。

$("#nextPage").click(function() {
  $('#pagination option:selected').next().prop('selected', 'selected');
  console.log("hahaha next");
})

$("#prevPage").click(function() {
  $('#pagination option:selected').prev().prop('selected', 'selected');
  console.log("prev");
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="button" value="prev" id="prevPage">
<select id="pagination">
  <option value="1" selected>1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
</select>
<input type="button" value="next" id="nextPage">