jQuery的变化检测值

Question

我用下面的教程来填充从JSON列表下拉菜单：http://loopj.com/jquery-tokeninput/

我特别用下面的代码：

$(document).ready(function() { 
     $("#demo-input-local").tokenInput([ 
      {name: "Ruby"}, 
      {name: "Python"}, 
      {name: "JavaScript"}, 
      {name: "ActionScript"}, 
      {name: "Scheme"}, 
      {name: "Lisp"}, 
      {name: "C#"}, 
      {name: "Fortran"}, 
      {name: "Visual Basic"}, 
      {name: "C"}, 
      {name: "C++"}, 
      {name: "Java"}, 
      {name: "Taranto"} 
     ]); 

     $("#demo-input-local").change(function(){ 
      var city = // get the selected value on change 
      console.log(city); 
     }); 

    }); 

我希望能够选择值一旦一个新的选项被选中

Answer 1

this.value持有所选项目的价值。

Answer 2

用途：

$("#demo-input-local").change(function(){ 
     var city = $(this).val(); 
     console.log(city); 
}); 

演示：http://jsfiddle.net/FlameTrap/uAhGJ/