Jquery多选: How to know which value was selected/deselected

Question

我有多选下拉菜单。每当有选择或取消选择时，我都需要获取该值。我正在使用更改事件，但很难确定选择/取消选择了哪个选项。

Answer 1

//all options

var all=[];
$('#multiple').each(function(i, selected){ 
    all[i] = $(selected).text(); 
});

//selected options  
var foo = []; 
$('#multiple :selected').each(function(i, selected){ 
    foo[i] = $(selected).text(); 
});

// unselected options
var de= $.grep(all, function(element) {
    return $.inArray(element, foo) !== -1;
});

foo 数组中是选定的值

在de数组中是未选择的值