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

问题

I have Multiselect dropdown. Whenever there is a select or deselect, I need to get the value. I am using change event, but struggling to get which option was selected/deselected.

回答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;
});

In the foo array are the selected values

In the de array are the unselected values

回答2:

Try this,

$('#selectId').on('change',function(){ 
    console.log($(this).val());// this will give you an array
});

来源：https://stackoverflow.com/questions/18627643/jquery-multiselect-how-to-know-which-value-was-selected-deselected