如何使用jquery获取下拉菜单中所选选项的值？

Question

  <select id="testSelection">
           <option> test1 </option> 
           <option> test2 </option> 
           <option> test3 </option> 
           <option> test4 </option> <--- selected this one from the pull down menu 
           <option> test5 </option> 
           <option> test6 </option> 
  </select>

             $("#testSelection").change(function()
             {
                    alert($(this).text());
             });

对我来说很奇怪,警报消息显示所有选择,但我希望它只显示test4文本.

Answer 1

<select id="testSelection">
    <option value="1">test1</option>
    <option value="2">test2</option>
    .....
</select> 

这真的取决于你想要的东西:

$("#testSelection").on('change', function() {
    // if you just want the text/html inside the select (ie: test1, test2, etc)
    alert($(this).find('option:selected').text()); 

    // or you want the actual value of the option <option value="THISHERE">
    alert($(this).val()); 
});?

jsFiddle DEMO